PetRos EiKon News

June 2012 News

PetRos EiKon — Fri, 22 Jun 2012 13:57:16 -0000

Magnetotelluric Developments

New Import Facilities

.edi format: There is now an import facility for .edi format into QCTool for all data elements and processed elements. QCTool can then be used to quality control and edit your data. Impedance and Tipper data can then be imported to EMIGMA via the import facility for such data using the .qct format.

Stratagem data: Native Stratagem files can now be imported to QCTool through the Stratagem import facility. Once you have analysed and appropriately edited your data in QCTool, it can then be imported to EMIGMA from the .qct format.

1D Inversion: We have utilized Occam type inversions to date, but as a process of upgrading our MT tools, we have added a parameter constrained “Marquardt” style inversion. These inversion tools are quite different from the original Marquardt inversion techniques yet similar. It is an under-parametrized inversion approach and uses analytic gradients and numeric curvature terms but the actual minimization approach is much closer to our other documented inversions. (See downloads page).

Display Capabilities: Some significant work has been done on plotting, gridding and visualization displays for natural field data.

3D Tipper Inversion: A 3D tipper inversion in available but is not part of the standard license. Please contact sales if you are interested in such algorithms.

3D Impedance Inversion: We are in the last stages of testing and hope to have something available for September. This will be part of the standard MT license and will be free as an upgrade to all clients having licenses under maintenance.

CSAMT Developments

For many years, EMIGMA has contained 3D CSAMT modeling. However, it was quite distinct from standard CSAMT modeling in that the actual geometry of the transmitting wire was used including not only the injected currents but the currents induced in the ground due to the magnetic fields emanating from the wire.

A few years ago, with UN support, we upgraded our CSAMT tools to import Zonge data including both impedances and the synchronized measured fields (ie. Voltage and Magnetic fields). At this time, we also added constrained 1D inversion using the full source effects. These developments combined to allow the use of data not only in the far field but also in the near field thus allowing the use of all measured frequencies.

Recently, we have upgraded our CSAMT tools again and are in the middle of more extensive developments. First, we have upgraded the import tools through the .qct format thus essentially allowing any data that can be formatted to a spreadsheet or .xyz format to be imported. Also, as part of new developments to more closely support all Phoenix instruments, we have developed imports to EMIGMA for their .avg format which includes impedances and fields.

Generally, we upgraded our display and survey design tools for CSAMT so as to move closer to having the combination of EMIGMA and QCTool be a comprehensive tool for survey design, QC/QA, processing and interpretation for CSAMT. This is motivated by what we see as a strong growth in the wish to use such data and by the limitations of being forced to interpret such data as MT data but also due to our involvement as consultants in such projects.

We have reworked our CSAMT 1D inversions to be more rugged, accurate and fast. 3D CSAMT inversion is in development and likely to be released in the fall of 2012.

March 2012 News

PetRos EiKon — Fri, 09 Mar 2012 21:39:32 -0000

We are excited to present to you some of the many new features have been added to our products in the fall of 2011 and the early winter of this year.

Enhanced 3D Inversion: There have been extensive improvements to the 3D Gravity Inversion algorithms allowing for much larger problems to be solved. In addition, the new algorithms are about 10 times faster than the previous algorithms. In addition, the 3D Gravity inversion interface has been extensively modified and improved so that its appearance and functions are more consistent with that of the other inversion tools. Some improvements have been made to the Magnetic Inversion to bring both the interface and algorithms inline with the capabilities of the Gravity inversion. Similar changes have been made to the 3D Resistivity Inversion.

Chinese language documentation: We are currently translating some of our manuals, tutorials and videos from English to Chinese. Look on the Chinese page of our website for the materials that are available.

Importing Data
• FEM Dipole-Dipole data can now be imported from QCTool files. As well, extensive improvements have been made to import the GTK fixed wing AEM data.
• MT data stored in Zonge’s .avg file format can now be imported
• Moving loop TEM data in a Crone format can now be imported.

Xhole Modeling Tools: A number of updates have been made to the capabilities in EMIGMA for modeling different types of transmitters and receivers for Xhole applications.

GeoElectric CrossSections Display: Significant improvements have been made to our display capabilities for sections produced by 1D inversion applications within EMIGMA.

CDI processing can be interrupted before completion so that the processing can be resumed at a later time. Improvements have been made to the accuracy and stability for apparent resistivity and apparent depth for FEM data.

Exporting inversion models: Two formats are now offered for exporting 3D inversion models to QCTool and thus to ASCII.

New QCTool features
• More advanced tools for UTM coordinate and longitude/latitude conversion with many new datums and projections added.
• KML file format used with Google Earth and Google Maps can be both be imported and exported from QCTool
• AutoCAD DXF can also be imported for use in QCTool

Other new features include being able to copy a profile from another survey and new capabilities for manipulating polyhedra within EMIGMA’s Visualization environment. Many other small improvements have been made to the Visualization tools.

Upcoming Features
3D Inversion for MT and CSAMT is coming very soon: The CSAMT inversion will utilize the 3D aspects of the source and thus there is no requirement to be in the far-field. Also, the Voltage measurement and the Magnetic measurement in the CSAMT inversion can be used individually, together as a joint inversion or as an impedance ratio. Obviously, E and H in a CSAMT survey are sensitive to different 3D features.

3D CAD Import/Exports

PetRos EiKon — Mon, 31 Oct 2011 18:48:22 -0000

We have augmented our tools for interacting with 3D CAD applications. In particular, we have added compatibility with AUTOCAD 3D, Surpac and Vulcan. The user may import or export 3D .dxf formats, Surpac .str format and Vulcan .asc format. The AutoCAD format has been tested with AUTOCAD 3D but we understand that the .dxf can also be imported to Surpac, Vulcan, Datamine and other 3D CAD applications. The VULCAN .asc file must be convert to the .00t binary format prior to importing to VULCAN and vice versa before importing to EMIGMA. Vulcan provides a standalone application for these functions to licensed users. The .str format is limited by Surpac to descriptions of 2D polygons in 3D. While somewhat limited it is quite useful for importing/exporting thin structures. These tools are available in our latest upgrades.

QCTool Version 2.3 released

PetRos EiKon — Tue, 27 Sep 2011 16:27:47 -0000

This new version comes with following major new features:

Recompiled and optimized for use with Windows Vista and Windows 7
Contains all new features and fixes from update patches created since the release of version 2.2
Support for Scintrex ENVI/ENVI PRO data import format
Add new line functionality
Many memory allocation errors are fixed

Users with a current license may run the update utility in order to use this new product. Others may go to the download page for a 30 day trial.

Sept 2011 News

PetRos EiKon — Thu, 01 Sep 2011 19:32:07 -0000

New Release of Algorithms for Resistivity: New versions of these algorithms have recently been released which improve speed significantly as well as accuracy and stability. These improvements affect all forms of 3D Reisistivity Modeling in EMIGMA including ground, surface to borehole, borehole to borehole, underground as well as both surface and borehole MMR.

Improvements to the use of Crone data: We have released a range of new as well as improved functionality for working with Crone borehole and ground data including TEM, DC Magnetics and MMR. For example, we import the 3-component DC magnetic data from the horizontal components’ file and de-rotate the data and import so that the user may directly model this data. We also now work directly with the .raw files as well as .tem files. The .raw files allow the user to import repeats for examination of noise levels. Later, the repeats may be stacked in EMIGMA for interpretation purposes. For the borehole data, the .raw files allows the de-rotation of the data within EMIGMA. This is useful when there are de-rotations issues with the Crone implementation and we may directly examine the issues within EMIGMA and provide quick fixes if required.

Modeling Crone TEM data: We have been working extensively with Crone surface and borehole TEM data carrying out numerous calibration tests and believe that we are able to more correctly simulate their data than has previously been available both within EMIGMA as well as other software. Working closely with our client with underground intercept results and drill logs, we have been able to determine how other common software mis-represents Crone data in their models thus leading to grossly incorrect interpretations. You may want to contact us on these issues at support.

TEM Inversion Enhancements: Previously, we had released versions of our inversion software which allowed the use of multiple data points to determine an inversion model. These tools allowed the user to move along flight lines with a moving selectable window which provides much enhanced and more reliable inversion results. But, for fixed loop results, the user could only gain 1 inversion model from an inversion. Now, the user may select a moving window and move along profile lines inverting for 1 model per window position. This brings to full play our knowledge that multiple stations do not suffer a lack of uniqueness to the same extent as single stations models.

Magnetic Inversions: While we have previously released 3D magnetic inversions which allow the use of both airborne and ground data to derive a model significantly reducing the uncertainty in the inversion especially when utilizing derivatives ( either measured or processed), we are now experimenting with the joint use of airborne, ground and borehole data for better resolution at depth. This capability adds to our ability to constrain with core results. The results appear very successful and should be available for our client’s use in the near future.

MT/ZTEM and CSAMT Inversions We are well on our way in our progress towards 3D inversion of MT and ZTEM data as well as 3D inversion of CSAMT utilizing the 3D source characteristics. Look for availability of the first of these algorithms in early Fall, 2011.

July 2011 - New MMR tools and license

PetRos EiKon — Wed, 06 Jul 2011 21:37:50 -0000

New simulation algorithms have been developed in our EMIGMA geophysics software for MMR surveys both ground and borehole. These algorithms allow stable, accurate and rapid 3D modeling at DC for ground current sources and well as current sources which have one electrode down a borehole. The modeling allows for the simulation of 3 components of the magnetic field. The algorithms allow for a complex representation of the source as well as actual borehole geometries. A many-layered background is allowed. Targets may be large to represent variations in the resistivity of the background rocks or small to represent targets. Extreme ranges of conductivities are allowed. Import of measured data with comparison to forward models is allowed. At the moment, only the Crone format is available but should you require a different format, we would be happy to provide this for you. The new algorithms also allow new faster and more stable simulations of underground current sources and underground electric field measurements.

The MMR license includes both ground and surface-to-borehole MMR capability as well as underground or Xhole DC resistivity capability. In addition, this license includes borehole DC magnetic modeling.

EMIGMA 8.6 is now available

PetRos EiKon — Fri, 24 Jun 2011 23:24:54 -0000

Licensed users with an up to date maintenance may download the latest release of our geophysics software here.

March 2011 News

Petros Eikon — Fri, 04 Mar 2011 23:16:00 -0000

There are always new improvements coming to EMIGMA but we mention here some of the more notable additions during the fall of 2010 and early winter 2011.

New Magnetic Inversion Algorithms and Tools
Partially because of our own needs for improved magnetic inversions for our extensive consulting work in the gold exploration industry, we have done a complete re-work of the inversion tools including many new improvements.

Last year, we released 2 new fast matrix inversions tools to allow both faster and larger inversion processes. Last fall the inversion algorithms were reworked to be faster, more stable and allow larger inversion tasks. But even more importantly they were upgraded to allow joint inversion of multiple data sets. Thus, the user can now jointly invert, for example, both ground and airborne data with or without magnetic gradients either measured or derived from FFT grids. Additionally, we have entirely re-worked the interface to allow an easier grid definition with visual aids. In addition, we have added to the ability to use both linear and exponential vertical grid definition, the ability to mix different linear depth thicknesses for different vertical depths of the inversion grids. Thus, one can define thin shallow grid definition with intermediate thicknesses at intermediate depths and thicker thicknesses at depth.

Additionally to these improvements, we have added the ability to constrain the model with borehole susceptibility information as well as ground samples of susceptibility. Also, added is the ability to process the inversion grids to remove cells of defined sensitivity. Thus, one can remove weak susceptibility cells to focus on the main structures, view the refined grid and re-compute the response of the refined grid.

The result is a fast, stable, accurate and flexible inversion product which is very suited to enhanced resolution of the derived structures.

Static Borehole Data and Borehole Geometry Imports

For a longtime, we have been able to model borehole total field magnetic and vector data as well as gravity data. Now, you may import the data for comparison to models and utilize in your gravity and magnetic inversions.

In addition, we have augmented our tools for importing the borehole geometries which also allows you to import other borehole data. This allows you to view the borehole geometries in conjunction with your models as well as with our new tools for importing mine workings into your visual displays.

New Polyhedral Structure Builders

We have added three new tools for importing structure into a complex polyhedral volume. First, we have augmented and upgraded our tools for importing GEMCOM .tri files allowing one to import geological models from several applications most notably from GEMCOM and GoCad. Secondly, we have added the ability to import three dimensional volumes from a QCTool grid. This for example, allows one to build a topography model in QCTool and then export to EMIGMA as a 3D volume. But, generally it allows one to import a 3D surface into EMIGMA and give it an arbitrary thickness. Finally, one is able to import a polyhedral model based upon an ASCII 2D geometry and give the structure a radius. This is most useful in importing such things as mine workings into EMIGMA to view in combination with models and borehole geometries.

Additionally, we have moved these tools into a direct capability from the main EMIGMA database interface.

Crone Borehole TEM and Magnetic Data imports: Crone TEM data offers some very large advantages to other impulse data in that it provides accurate and reliable measurements during the ramp (on-time) with the advantages of impulse measurements as well as offering 3-component magnetic data.

We have augmented our imports and functionality in several ways. First, the user may import the raw (un-averaged TEM) data and perform the borehole rotations either from Crone data information or other borehole geometry information. Secondly, one can import the borehole magnetic data from the raw files and de-rotate without the need for Crone processed magnetic files.

We have been using Crone data extensively in our own consulting services and find these tools extremely convenient and effective.

Shortly, the user will be able to import the Crone MMR data and use it with our new MMR modeling and display tools to be available by summer 2011. If you have need to model this type of MMR data please contact us at services@petroseikon.com

Data Processing

We are always augmenting our processing tools to meet the need for enhanced data processing. Recently, we have added 3 new tools

Convert units: This allows the user to convert units of both measured and simulated data to other data units and then continue with processing, modeling or inversion.

Data Outlier Removal: a convenient tool for removing outliers in your data. User selectable ranges are allowed.

Vector Rotations: Often it is necessary to rotate your vector data. This tool allows an accurate, flexible and user-friendly way to perform these operations.

PROMIS FEM imports and tools: The new PROMIS FEM equipment is easy to use and accurate piece of equipment allowing one to rapidly collect accurate multi-frequency and multi-separation FEM data to replace the aging Max-Min instrument. Our own tests of the instrument show it to be a reliable and efficient instrument. As such, we have improved our tools to import and utilize the data both for modeling and inversion.

Vector Magnetic Data Imports, Modeling and Inversions: We have extended our magnetic imports to allow import of vector magnetic data for either ground, airborne or borehole data. The imported data then allows easy modeling and inversion setups.

Gradient Gravity Data Imports, Modeling and Inversions: We have improved our gravity imports to allow import of any or all of the tensor components and then the data can be used directly in our modeling and inversion tools.

Upgrades to Resistivity/IP Imports: Upgrades have been made to import such data in either the generic Geosoft formats or ELREC 6 formats or Zonge GDP_32 formats. This allows quick access to our display tools whether as plots, sections or 3D visualization as well as for use with our 2D/3D IP/Resistivity modeling or 1D or 3D Resistivity inversions.

Survey Editor Upgrades: Our survey editor tool is very useful for reviewing and editing your surveys. New tools allow displays of sources as well as the co-ordinates of the vertices of your source.

Mapping Upgrades: New tools allow the integration of maps particularly with transparencies and then outputting to MapInfo or Arc Map Geotiff formats.

We trust you will enjoy and appreciate these new features in our sub-release EMIGMA V8.5.5.

EMIGMA V8.5 has been released

PetRos EiKon — Thu, 29 Jul 2010 22:53:18 -0000

We are pleased to announce the immediate release of version 8.5 of EMIGMA. EMIGMA users with a license currently under maintenance are eligible for a free upgrade to this latest version. It is available for download in the Downloads area of our website. With this release, we took the opportunity to clean up a large number of small items that were in the previous version of EMIGMA. The more notable new features include:

Magnetic Data Import: extension for multi-sensors
UTEM3: Point-Normalization option
Airborne TEM: Upgrades to handle HeliTEM including imports and rotation of receiver unit
Airborne TEM: Upgrades to allow normalization by current channel
Mapping overlays/underlays and transparency upgrades for Grid Presentation and Profile Modifier tools
CSAMT: New CSAMT 1D inversion with 3D source, inversion for impedance, E-field or H-field as well as inversion for multiple stations
SMARTTEM data import in Amira format
3D Magnetics and Gravity inversions: Extensive enhancements to improve stability, speed, size of inversion grid and size of data set
3D Resistivity Inversion: A new addition to the 3D inversions that EMIGMA offers
Plotter: Addition of error bars if error data exists
Plotter: Improvements to MT display allowing direct plotting of 1D and 2D estimators from the loaded impedances. This includes Strike Angle, Skew Angle, Principal Impedances, 1D Impedance average and determinant estimators
Visualizer: Now supports visualization of huge inversion grids
Apparent Resistivity Calculation for TEM: Improvements to invert each time channel for halfspace apparent resistivity
Aeromagnetic Compensation: This functionality is no longer supported in V8.5, however it is still supported in QCTool.
Inversion Model Export: 1D and 3D inversion results can be exported to a QCTool file
Database Export: Added option to select a group of data sets that can be compressed to a single file

What's new in EMIGMA

Fri, 29 Jan 2010 03:03:32 -0000

Here are some highlights of the features that were included in EMIGMA during the fall of 2009.

Zonge Data Imports in native format: EMIGMA has been augmented to allow direct import of the Zonge .avg format from the GDP32 for CSAMT, Resistivity/IP (frequency domain and time domain) as well as TEM data. The CSAMT import allows import of Efields and Hfields as well as the impedance data.

CSAMT Inversions: We have added the inversion of CSAMT data to our suite of one-dimensional inversions but with some twists. First, the true 3D source is utilized allowing the effective use of non-farfield data and secondly, the user may invert impedances, Efields or Hfields. Thus, in this manner, one may actually effectively utilize your CSAMT data without regard to farfield assumptions which almost never occur over the entire range of utilized frequencies and the separation of the e- and h-measurements.

VTEM waveform: We have augmented EMIGMA to allow a much more accurate representation of the VTEM waveform. This can be utilized for much more accurate inversions as well as 3D simulations. Both the new waveform and the traditional waveform are now offered.

Moving System TEM inversions: Our extremely effective TEM inversions have been further extended to allow horizontally constrained inversions. In this implementation of horizontally constrained TEM inversions, the user is ask to select the length of a moving window of stations along a line or flight as well as the weights assigned to each location in the moving window. The inversion then moves along the line inverting jointly all the stations with weights to produce a model that fits all the stations within the windows, stores that model and moves the window along. The windows may be overlapping or disjoint.

Revised Exports: There is an ever-increasing demand to export EMIGMA results to other applications for such things as our processed data, grids, inversions and model results. We augmented most aspects of these export capabilities.

Resistivity Inversion: In the fall, we augmented our 1D resistivity inversion significantly including inversions for gradient data. Now, we are hard at work on our first 3D resistivity inversion application. We are hoping to see this released before the end of February 2010. This inversion will form the basis for other 3D inversions of galvanic applications such as CSAMT, MT and ZTEM data where the focus will be on inverted only galvanic and magnetostatic scattering effects.

Feel free to contact us for further details on any of the above items.

New features in EMIGMA and QCTool

PetRos EiKon — Wed, 08 Jul 2009 17:18:09 -0000

Here are some of the many new capabilities that have been added to our products:

Freespace EikPlate Algorithm: We are pleased to announce the release of a new 3D algorithm which we call Freespace EikPlate. The solution is only for inductive sources and magnetic receivers providing both dB/dt and B(t). Our solutions are based upon the doctoral thesis of Peter Annan and expands upon the older algorithm called UTPLATE which was used for many years in the 1980â€™s and 1990â€™s. It is a very fast algorithm but provides a more complete inductive solution than other ring current solutions which require relatively square plates and uniform excitation. At present, the solution is only for 3D inductive sources but we will later be extending for plane wave sources such as in MT and AFMAP/ZTEM.
Import from QCTool, gdb to QCTool: We have been augmenting more and more of our data import tools to read QCTool files. This allows for user pre-processing of data as well as more stable and rapid importing of large data files. To this end, we have added the ability to directly import Geosoft .gdb files into QCTool.
MT imports: We have provided significant expansion of the MT data and Induction vector data that can be imported into EMIGMA through the QCTool format. This allows very arbitrary formats to be first imported into QCTool, re-organized and then imported into EMIGMA.
GDP32 imports: We are rapidly expanding our import capabilities for the Zonge GDP32 system. At present, we have added CSAMT and TEM imports through the older .avg format and will be shortly releasing the same capabilities for the newer .avg format. Later in the summer and early fall, we will be releasing import capabilities for IP that support both old and new .avg formats. Importing of Resistivity, frequency domain IP and time domain IP data will be available as well.
Phoenix data imports: Users may now import Phoenix TEM data through the .usf file format as well as the CSAMT data via QCTool.
Topography imports and simulation: We have simplified the steps needed to import XYZ topography data for modeling purposes. Simulation of the topographic effects particularly for potential field has been made easier as well. In addition, we have provided more extensive topography import capability through the use of a QCTool grid file. The user simply needs to import the topographic information to QCTool, grid as desired and then import the resulting grid (.egr) file into EMIGMA to reproduce the topography. The topography may then be subdivided if desired for different material properties.
Magnetic effects in MT, Induction vectors and ZTEM/AFMAG: Due to the nature of the source, magnetic structures can be very important in natural field responses particularly for induction vectors (Tipper responses) for both ground and airborne data. We have augmented our simulation of plane wave sources to include magnetostatic and current channeling effects on the fields, particularly the magnetic fields.
ZTEM/AFMAG: EMIGMA is now capable of importing, analyzing and simulating these systems. We have not yet released the tools but these capabilities are now available through our consulting services. Once we are satisfied with the stability of our tools and its representation with field data as represented by the manufacturer, these tools will be available.
Polyhedral simulation capabilities: We have recently completed a large revamp of these capabilities and performed extensive testing. These upgrades are available through the Update functionality in EMIGMA.
Terrain in Gravity and Magnetics: The terrain or topographic effects in Gravity and Magnetics are of continuing importance to our developments. Several new capabilities have been made available including: Improved terrain corrections in QCTool, Improved terrain modeling in EMIGMA and the inclusion of terrain in our 3D gravity and magnetics inversion.

Feel free to contact us for further details on any of the above items.

Time Domain Inversion

PetRos EiKon — Mon, 06 Jul 2009 16:15:12 -0000

While EMIGMA has contained one-dimensional inversion for TEM for a few years now, we have recently released two significantly enhanced versions.

EMIGMA has offered a range of capabilities for tdem inversion including:

In-loop and out-of-loop configurations
Transmitter and receiver on different elevations
Vertical and horizontal receiver orientations
Occam overparametrized and Marquardt underparametrized models
Full parameter constraints including selection of parameters for inversion
Multi-layer starting models
Rapid approximate (theoretical) current waveforms and true system waveforms
Incorporation of system filters
Storage of synthetic data from each location
User control of time windows for inversion

However, we have expanded the functionality to now allow more flexibility for production including:

Recovery of inversion settings from a log file
Recovery of inversion processing from either a user initiated stop or a crash. Inversions processed prior to a user initiated stop are saved as synthetic model data so the user may later start up the inversion from the last processed position. Inversions and synthetic data are saved automatically every 100 locations so if there is a crash, you may start from the previous automatic save.
The use of multiple starting models in any inversion processing procedure
The use of the prior data point inverse model as the starting model for the next data point giving the user a style of lateral constraint
Export of inversion models to formats suitable for import to 3D visualization applications and other mapping software

New:

On July 2, 2009, a new version was released allowing the use of multiple datapoints and/or multiple components. This capability is based on several obvious physical reasons but also on experience of many inversions calibrated to known structure. Among these are:

Multi-component inversion for the same data location provides increased signal to noise aspects in the inversions but also allows more detailed resolution in the underparametrized model.
In-loop data provides more accurate shallow resolution than out-of-loop data while the reverse is true for deeper structure. Thus combining in-loop and out-of-loop data provides significant overall shallow and deep structural resolution.
If the earth is approximately 1D then a combined inversion of multiple data points provides the overall best structural definition. This is particularly useful when needing to do 3D modeling in a non-resistive environment where the determination first of the overall background resistivity versus depth is first required. This is also particularly important when inverting for long offset data where the receivers are far from the centre of the loop thus providing very accurate depth/resistivity inversions. As an example, you may download recent papers from our Downloads page.

For later release in summer 2009:

We are working on new inversion capabilities for moving TEM configurations where multiple data stations may be used. The user will be allowed to define the width of the data station window and the weighting of the stations in the inversion. This will allow a smooth laterally inline constraint on the inversions.

Updated Demo Databases

PetRos EiKon — Fri, 17 Apr 2009 22:07:58 -0000

The demo databases available in the downloads area of this website have received some substantial modifications. Also, a new database focusing on airborne FEM data has been added. These databases are for use with both the licensed and demo versions of EMIGMA.

New TDEM Demo Database

PetRos EiKon — Wed, 25 Mar 2009 15:37:46 -0000

A new demo database exclusively containing time domain data for ground and borehole surveys is available. This latest addition to our group of sample databases can be downloaded from the sample database page of this website. All these databases can be used with the EMIGMA demo.

QCTool Price Increase

PetRos EiKon — Thu, 05 Mar 2009 19:34:52 -0000

As of April 1, 2009, the price for QCTool will be $200 CAD.

Download GeoTutor IV

PetRos EiKon — Fri, 20 Feb 2009 23:08:35 -0000

GeoTutor IV is now available for download from our website. You may use all the functions of this EMIGMA based product free of charge for 30 days if unregistered. Install it today.

Magnetic Compensation Plug-In

PetRos EiKon — Fri, 16 Jan 2009 23:47:29 -0000

We now offer a plug-in for Geosoft Oasis to perform magnetic compensation on aeromagnetic data contained within your .gdb files. The compensation coefficients are still computed within EMIGMA from box data but now you may perform the compensation directly through a .GX plug-in to Oasis. The data is recovered automatically from the .gdb file and the compensated channels stored in the .gdb file. The compensation can still be performed in QCTool or EMIGMA. QCTool offers the ability to perform compensation in the field with a low cost product without requiring expensive licenses to be allocated to the field. For a review of our extensive compensation capabilities please refer to the papers #15, 16 and 17 in the technical papers section of our website.

EMIGMA video now available

PetRos EiKon — Tue, 02 Dec 2008 17:15:52 -0000

A training video demonstrating the power of EMIGMA can now be downloaded for free from the Downloads section of our website. This fully narrated 40 minute video will walk you through certain tasks such as importing measured data, building a model for simulation, inversion, grid interpolation and viewing processed data. If you are new to EMIGMA, this exploration of its various tools will help deepen your knowledge of the software.

Note: You will need a player which can play the avi format to view this video (e.g. Windows Media Player, VLC Media Player)

Download the EMIGMA video

New Modeling Capabilities

PetRos EiKon — Mon, 10 Nov 2008 20:06:54 -0000

Petros Eikon now offers several new modeling capabilities. We now offer forward modeling capabilities for MTEM and CSEM as well as for airborne MT applications such as ZTEM. These techniques offer 1D, 2D and 3D forward models via all of our algorithms and via our standard model building capabilities. Data import and inversion for MTEM are also available but are subject to certain proprietary agreements for another year. Consulting inversion of MTEM is however provided by us. Please contact us for further information.

Interested users should note that these capabilites are add-on capablilites to several of our products. Pricing for these add-ons are not included in our prices. Interested parties should request a quote or send an email to us regarding pricing.

New terraTEM import and functionality added

PetRos EiKon — Thu, 26 Jun 2008 21:40:58 -0000

EMIGMA now has the ability to import data generated by the terraTEM instrument.

Note: This import functionality will allow the import of Phoenix Instruments TEM data using the .usf format with slight modifications.

GeoTutor IV is now available

PetRos EiKon — Wed, 11 Jun 2008 21:11:36 -0000

We are proud to announce the immediate release of GeoTutor IV. This new version introduces the ability to register online using a customized serial number in the same way as Petros Eikon's QCTool. Other enhancements include additional import file types, a more intuitive interface and updated video tutorials. Two levels of GeoTutor IV licenses are available: Standard or Cross Borehole. To order, click here or contact sales.

EMIGMA V8.1 is now available

PetRos EiKon — Mon, 28 Apr 2008 21:29:13 -0000

We are happy to announce the immediate release of EMIGMA V8.1, which brings with it complete compatibility with Windows Vista as well as a number of new capabilities and improvements. Current owners of EMIGMA licenses may download this latest version from the Downloads area of our website. Instructions will be provided for you there on how to install our exciting new release.

New features:

Full Vista compatibility: Many hours have been spent to ensure that this version is fully compatible with Windows Vista and EMIGMA's compatibility extends to Vista's 64 bit edition. While EMIGMA, being a 32 bit based software package, will not utilize the full capability of the 64bit chipset and CPU, its design will enable some utilization of the 64bit capability. Many applications in EMIGMA run on their own thread and thus it is possible to make good use of a multiple core chip if you have such hardware installed.
Online updates: EMIGMA's update capability, which allows you to download and install updates for the software has been improved. Clients in certain geographic areas, such as China, who have been unable to use this capability before can now take advantage of this feature.
Contouring: The 3D visualizing contour tool has been completely redesigned to be much more robust and effective. Contours can now be integrated with a 3D surface and the interface has been simplified for ease of use. This tool allows for 3D volume rendering of your magnetic, gravity and EM inversions.
FEM 1D Inversion: The inversion algorithm has been altered to recognize additional relevant factors such as displacement currents resulting in a more accurate inversion. A new constrained Marquardt style inversion has been added to allow you to use a starting model and parameter constraints. These upgrades for high frequency effects have been added to the apparent resistivity and apparent depth calculations.
TEM 1D Inversion: Joint inversion of a customizable combination of components and separations for both Occam and Marquardt inversion types has been added. Incorporating more varied data into the process will provide better signal-to-noise ratios within the inversion. Being able to carefully select data that contain information about different geological structures may enhance the resolution of the inverted models and result in more meaningful models.
Upgrades have also been added for the inloop approximate forward OCCAM inversion.
The TEM Inversion is a full, correct forward modeled based inversion utilizing full parameterization constraints. It also utilizes a type of locally constrained inversion and is developed for production. Thus, inversions are stored after every 500 points and can be stopped and resumed at any time. Multiple starting models and constraints may also be defined for any inversion run.
MT/CSAMT/VLFR Import: EMIGMA has been upgraded for import of table formats for MT and there is an entirely new import added which allows for you to import MT/CSAMT and VLFR data into EMIGMA from QCTool. Organization of ASCII files in QCTool is simple and thus any ASCII file can be reorganized in QCTool for import of these data.
Airborne TEM imports: Airborne TEM imports have been entirely re-done with a new easier and more intuitive interface. For those of you working with large datasets, we have added the ability to import from QCTool.
QCTool imports: We are moving more and more towards importing from QCTool. With its low price (and 30-day free use), it is possible to have your contractor deliver your data, import into QCTool to reorganize, edit and process, followed by interpretation in EMIGMA. Also, it is easy to transfer from a .gdb file into QCTool and vice-versa. Remember that you can process and reduce all of your magnetic, gravity and EM data in QCTool and if you are using the the IP12 series or lower of IP instruments, you can use QCTool for initial processing prior to import into EMIGMA.
FASTTEM: EMIGMA has been upgraded to allow import and use of the FASTTEM system. TerraTEM data may be imported through the AMIRA format but a native TerraTEM import is coming in the next few weeks.
MTEM: MTEM capability has been added. However, licensing is controlled by the company who paid for this development, so you will have to contact us if you are interested.
Bug fixes and minor enhancements: Moving to 8.1 allowed us the opportunity to redesign some overall enhancement to functionality. In the interim, while enabling Vista compatibility, we were able to clean up a number of bugs and irregularities. Several new enhancements have been made. For example, you may pin the main page for ease of use when operating dual monitors and there is very nice right mouse click toggle from profile to decay in the plotter.

Buy Our Software Online

PetRos EiKon — Mon, 11 Feb 2008 22:30:20 -0000

Recently added to our Price page is the ability to securely purchase various PetRos EiKon products online using PayPal. Software items now available via this convenient feature are QCTool, PetrosSuite, EMIGMA for Near Surface, EMIGMA Professional for FEM and GeoTutor. You can use any major Credit Card without creating a PayPal account. You could also create a PayPal account, and use it to pay through your bank. Click here to confirm what PayPal options are available in your country.

EMIGMA V8.1 Coming Soon

PetRos EiKon — Mon, 04 Feb 2008 18:08:55 -0000

We are very pleased to announce the upcoming release of EMIGMA 8.1 on March 31. This will be the first EMIGMA product to be fully compatible with Windows Vista. Also, our online update function which allows you to download and install updates to the software has been improved. Clients in certain geographic areas, such as China, who have been unable to use this capability before can now take advantage of this feature as well. Contact sales to preorder.

Improved TEM Inversion

PetRos EiKon — Fri, 04 Jan 2008 00:02:56 -0000

While EMIGMA has contained one-dimensional inversion for TEM for a few years now, we have recently released a dramatically enhanced version.

EMIGMA has offered significant capabilities for its inversion for sometime including

Inloop and out-of-loop configurations
Transmitter and receiver on different elevations
Vertical and horizontal receiver orientations
Occam overparametrized and Marquardt underparametrized models
Full parameter constraints including selection of parameters for inversion
Multi-layer starting models
Rapid approximate (theoretical) current waveforms and true system waveforms
Incorporation of system filters
Storage of synthetic data from each inversion model
User control of time windows for inversion

However, we have expanded the functionality to now allow more flexibility for production including

Recovery of inversion settings from a log file
Recovery of inversion processing from either a user initiated stop or a crash. This is achieved by saving the synthetic model data from the completed inversions at regular intervals so the user may start up the inversion from the position stopped
The use of multiple starting models in any inversion processing procedure
The use of the prior datapoint inverse model as the starting model for the next datapoint
Export of inversion models to formats suitable for import to 3D visualization applications and other mapping software

Contact sales for information on how to purchase Emigma and start making use of these exciting new features.

TEM-FAST added to EMIGMA

PetRos EiKon — Fri, 07 Dec 2007 21:22:24 -0000

Petros Eikon has enhanced one of its flagship products with TEM-FAST electromagnetic geophysical data capabilities. More specifically, EMIGMA is able to import native TEM-FAST data with associated plotting, gridding and filtering of that data. In addition, this system can take advantage of EMIGMA's excellent modeling and inversion capabilities. Contact sales for further details.

PetRos EiKon Services

PetRos EiKon — Wed, 21 Nov 2007 16:24:18 -0000

Make our experience and expertise work for you! Let us interpret and process and understand your data. PetRos EiKon has many geophysical services that can conform to your needs. We are especially experienced with geophysical data for ground, airborne or borehole applications in the areas of electromagnetics, magnetics and gravity.

Through our associations with consultants, instrument manufacturers and survey companies, we can recommend, supervise and quality control your survey requirements. With our years of experience in data interpretation combined with our understanding of the measuring equipment together and our mathematical expertise, we are able to provide a unique insight and understanding of your data. We can perform the processing of your data with a number of the industry's most exceptional software packages. Consequently, we are able to produce accurate inversions and 3D models to help you meet your exploration objectives. As a team, we are especially adept and quick at developing software which require special mathematical operations. However, as we have skills in visualization and database development, we also provide clients with solutions for these types of requirements. Geophysical data interpretation training is also provided.

Visit the services section of our website for more details on all that we offer.

QCTool V2.2 Now Available

PetRos EiKon — Fri, 09 Nov 2007 23:44:18 -0000

Visit our downloads area to obtain QCTool so you can experience this latest version first hand. Present users can upgrade their software for free for a limited time.

Included among the new features of this version is its support for Windows Vista. Internet capabilities have also been added in the form of the ability to register your license online as well as the ability to obtain the latest enhancements to QCTool through an internet update tool. Another addition is the convenient function of being able to merge and separate subsets of data. The spreadsheet feature can now insert rows and has improved printing capabilities. The user interface of PEGeoMap, our GIS mapping utility, has been entirely redesigned and is able to read and write to several file formats.

EMIGMA V7.8 - New Features

PetRos EiKon — Mon, 20 Aug 2007 22:37:09 -0000

Note: This article is updated in this PDF file.

It has been five years since PetRos EiKon first released Version 7.5 of its interpretation software package. The product is being received internationally with increasing popularity for its integration of software tools for non-seismic geophysical data. Initially released as EMIGMA V7.7 in May of 2004 and now (May/2006) in its third major release, EMIGMA V7.8, has an impressive array of new functions as well as improvements to almost all the older capabilities. In addition, many new features are in development to be released as upgrades later in 2006.

The new version continues to strengthen EMIGMA's historical focus of data simulation from 3D models:

our first 3D gravity modeling algorithms
3D gravity inversion algorithms
gravity and magnetics gradient modelling
increased capabilities for magnetics including the ability to use gradients either measure or processed in the inversion tools modelling
a new more accurate and faster 3D resistivity modelling algorithm
a new release of layered inversion for resistivity including both Occam and Marquardt types inversions
improvements to its electromagnetic modeling and inversion algorithms
enhanced features to the frequency domain transform to handle several new TEM systems
upgrades to our CDI tools for FEM and TEM
many upgrades to our TEM inversions for both ground and airborne systems
extended batch mode simulation
greens' functions interpolation for faster multiple models
model suite generation and automatic "best model" analyzer
new helicopter TEM waveforms - AeroTem and VTEM
inversion for magnetization vectors
new Extended Euler solutions for both gravity and magnetics

The research team continues to add and improve functionality for inversion:

1D TDEM inversion for for both in-loop and out-of-loop configurations, including airborne systems (now available with either Occam or Marquardt techniques)
Conductivity Depth Imaging improvements for ground and airborne TEM data
enhanced 1D inversion capabilities for Resistivity (now available)
new tools for Titan24 modeling
extended and improved the 3D magnetics inversion capabilities
3D Euler Deconvolutions with Rodin Post-Processing including use of gradients and vector components (now available)with either grid or profile data

Of course, we are always working towards including new imaging and processing algorithms:

V7.8 now has 3D Euler depth estimation for both magnetics and gravity data
New visualization of Euler solutions, Rodin and Cluster post-processing of Euler solutions as well as vector magnetization displays
3D magnetic inversion utilizing total field and gradients
3D gravity inversion is now available (inversions for airborne gradiometry available on request)
borehole gravity modelling
3D resistivity inversion available on request

But the vast majority of V7.8's increased functionality is directed towards providing the user with data processing, filtering and mapping functions. For example, this version provides:

an array of FFT tools for both gravity and magnetic data
several new reduction-to-the pole algorithms
wavelength filters plus upward/downward continuation.
FFT tools may be performed on both measured and simulated data for evaluation of user processing
digital and spatial data filtering techniques allowing user-selectable filter sizes for both 1D and 2D filters
many new mapping capabilities
new gridding algorithms and grid analyses tools.
a wide selection of datums for UTM and Lambert projections as well as projections for polar latitudes.
import and calibration of raster maps to UTM coordinates or latitude/longitude
raster map overlays with data grids
new graphical data editing tools
improved data and survey editing capabilities
many new data imports as well as extended data and model export capabilities
aeromagnetic compensation techniques
magnetic base station corrections
standard gravity data processing is now available in QCTool which is included with all Gravity licenses
many new processing features are now in QCTool which is bundled with EMIGMA to provide all pre-processing to your interpretations

New visualization capabilities have been developed:

a new tool for viewing data versus pseudo-depths
a new tool for analyzing 1D inversions as geoelectric sections
new tools for building 3D models in conjunction with data
improved image exports in both raster and vector formats
a new MULITIGRID tool
coordinate system transformations - (e.g. local grid to a world grid and vice-versa)
data stacking to allow data analyses for data repeats

New release of QCTool (August, 2007)

PetRos EiKon — Mon, 20 Aug 2007 22:36:06 -0000

The new release (August, 2007) offers further functionalities enhancing QCTool's capabilities and facility. The standard version now includes all gravity corrections, trend removals, IGRF corrections, Lambert projections as well as increased facility with spreadsheet functionalities. The plotter has been enhanced to provided more flexibility and ease when viewing large amounts of data. The survey mode edit and display capabilities have been enhanced and in general there has been a re-working to make the product easier to use, more stable and more functional.

In January, 2006, the new release offered further spreadsheet functionalities facilitating work within large data sets. You can now specify the font of the spreadsheet and easily perform various manipulations with data, such as Copy and Paste or adding different files to each other. The latter feature is especially useful when your data have been collected at different times and you want to put them all together. Also added are two new channels providing time and date information for each row of data.

Included in the Fall/2005 release are point by point IGRF calculations for magnetics using the latest coefficients. Now in QCTool you may perform your "diurnal" and IGRF and drift corrections. Extensions have also been made to the "Append and Merge files" functions.

EMIGMA Update

PetRos EiKon — Wed, 01 Aug 2007 18:32:08 -0000

Users with an active maintenance contract can now download a new EMIGMA update for July 27.

Purchase QCTool via PayPal

PetRos EiKon — Fri, 23 Jun 2006 18:41:07 -0000

You can now purchase a QCTool license online via PayPal. You can use either a credit card or, if you live in USA or Canada, your bank account.

PetrosSuite Teaching & Research Software

PetRos EiKon — Wed, 31 May 2006 16:30:50 -0000

PetrosSuite includes three of PetRos EiKon's software products, EMIGMA Complete Professional, GeoTutor III and QCTool providing the user with the functionalities required for the entire cycle of non-seismic data processing from quality control to sophisticated modeling and interpretation. This bundle sells at the price of US$2999 and is valid only for educational institutes. Being useful for any level of research, PetrosSuite may also become your best choice in teaching. Incorporating it into your course will make the latter more attractive for the modern computer-friendly generation of students. Multiple license packages are available at significantly reduced price. In addition, if you need to work with airborne data, you may upgrade your PetrosSuite to include EMIGMA Premium Complete for only $1000US.

New Data Processing and Interpretation Services

PetRos EiKon — Wed, 31 May 2006 16:27:54 -0000

Due to the extent of EMIGMA's new capabilties, we have been providing services for the last two years particularly for airborne EM and magnetics data but also for ground TEM data. With this experience for a few of our closest customers, we are now offering general processing and imaging services to the public.

In particular, we are offering our exceptional airborne TEM and FEM inversions at very competitive prices as well as 3D inversions of airborne magnetic and gravity data. Our specialty, however, is still in the inversion and modelling of ground TEM data. We also offer quality control services for your airborne and ground EM data. Please contact Sales if you are interested in discussing these services.

Aeromagnetic Compensaton now available in QCTool

PetRos EiKon — Wed, 31 May 2006 16:24:10 -0000

Petros Eikon has offered aeromagnetic compensation for several years in EMIGMA.

While our capabilities to calculate exception coefficients for the compensation were well accepted in EMIGMA, many users felt that the actual processing of the survey data was too awkward, slow and difficult to integrate back to other databasing software. Since, QCTool has proven to be exceptional in its ease of use, extent of its functionality and ease of migrating to other databasing software, we have added the survey data correction function to QCTool.

The calculation of the coefficients still lies in EMIGMA with its varied tools both for cleaning and visualizing but the coefficients are easily exported for use in QCTool. This also offers the benefit that the EMIGMA dongle need not be carried to the survey area as the coefficients can be calculated at your home office and sent via the internet to the field.

Two New Technical Papers

PetRos EiKon — Tue, 30 May 2006 23:20:46 -0000

Two new papers have been posted in the Technical Papers section.

Live Chat and Support

PetRos EiKon — Mon, 08 May 2006 23:15:44 -0000

You can now talk to us live during our work hours (9:30am-7:30pm EST/EDT). Feel free to ask us any questions you may have, but please be patient. It may take a while for someone to answer.

To use the chat system, choose a nickname and click "Login". If the nickname you chose is not available, you can set a new one with "/nick newname" (without the quotes) or just reload the page and retry.

New release of EMIGMA V7.8 now available

PetRos EiKon — Mon, 30 May 2005 17:45:08 -0000

The new (01-12-05) release of EMIGMA again offers increased capabilities for gravity, magnetic and resistivity modeling and inversion, new upgrades to 1D TDEM inversion for both in-loop and out-of-loop configurations, new Conductivity Depth Imaging (CDI) for ground and airborne TEM data, improved 1D inversion capabilities and CDI's for FDEM and Resistivity, extended 3D magnetic inversion capabilities, 3D Euler Deconvolutions with statistical and Rodin post-processing. The range of processing, filtering and mapping functions has also been extended to include tie-line corrections, trend removal, coordinate system transformations, accurate anomaly placement in UTMs, several new reduction-to-the-pole algorithms, aeromagnetic compensation, magnetic base station corrections, standard gravity corrections, new gridding algorithms, improved graphical data editing tools and many many others. The new release has better visualization capabilities including new tools for viewing data versus pseudo-sections, tools for analyzing 1D inversions as geoelectric sections, building 3D models in conjunction with data, etc.

Update for 2005-05-30 10:14:34

PetRos EiKon — Mon, 30 May 2005 17:14:34 -0000

Conductivity Depth Imaging now available in EMIGMA V7.8.

Update for 2005-05-30 10:13:55

PetRos EiKon — Mon, 30 May 2005 17:13:55 -0000

New Impulse to Step Processing now available in EMIGMA V7.8.

Update for 2005-05-30 10:12:53

PetRos EiKon — Mon, 30 May 2005 17:12:53 -0000

QCTool now available for Scintrex CG5.

Update for 2005-05-30 09:43:05

PetRos EiKon — Mon, 30 May 2005 16:43:05 -0000

Imports, Modelling, Inversion, CDI's available for VTEM and AeroTeM systems.