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DATA STORAGE TECHNOLOGIES (THREE OAKS SOFTWARE)

This company offers software to reformat petrophysical data sets to and from various formats. Output formats include LAS, LIS, and DLIS. The company also offers facilities and services to store data sets on CD-ROM's from tapes and/or floppies.

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Digital Formation, Inc.

LESA (Log Evaluation System Analysis)

LESA is a comprehensive, service company independent, interpretation system for open/cased hole logs, designed for a PC running under Microsoft^® Windows™. Data input/output is from LAS/ASCII files (LIS may be imported through a conversion step). The system will accept English, Metric or mixed-unit input. Full shaley formation and complex lithology deterministic models are available, together with extensive core-log comparisons. For evaluation of oil and gas potential, both quick-look and in-depth analytic modules are included. Extensive on-line help is available, describing all interpretive procedures. User-defined routines and plots allow customized interpretation. Additional modules include time lapse neutron interpretation for gas storage, evaluation of coal bed methane potential, calculations of oil shale organic carbon content and multi-mineral analysis. LESA also has various command line options, DDE connections and OLE automation to allow the software to be linked to other applications.

Esteem (Neural Network Curve Generation)

Esteem is a module to the Windows^® based LESA software that allows the user to generate data, or produce pseudo data from known good data. Using the Esteem module, you can select multiple input curves from one or more wells to be used to predict the values of one or more output curves.

Using a neural network type approach, the input values of a "training set" are used to predict the values of the output curves within the "training set". Once the neural network has completed training, the results can be applied to other wells with similar input curves to predict the desired outputs. The technique may be used, for example, to predict sonic curves from other logs, such as the GR, Resistivity and Density logs. Esteem may also be used for rock typing. The presentation of resultant rock types on application allows quick identification of new rock types that were not provided to the training set.

Minerva (Petrophysical Inversion Modeling)

Minerva is a module to the Windows^® based software LESA that can be used to perform a simultaneous solution of a series of response equations. The technique may be applied to a series of logs to solve for mineral and fluid components using inverse modeling.

The theory behind Minerva is that the user provides a series of log inputs, with associated linear response equations, and then chooses the number of output components to solve. The number of components to be solved must be equal to or less than the number of input logs. If the number is equal, then Minerva can directly determine the number of output components using a matrix inversion. If there are more inputs than outputs, Minerva uses a minimization of an appropriate cost function using an appropriate optimization method.

Minerva also automatically calculates a series of reconstructed logs based on the inversion, which may be used to detect uncertainties or areas in the logs where the inversion does not work, and may require separate treatment.

Synthetica (Synthetic Logs & Seismograms)

Synthetica is Windows^® based software that creates and displays synthetic seismograms from sonic logs through our LESA software. The program gives the user the ability to specify filters and phase rotation. You can use either AGC scaling or constant scaling.

Various filters are available for cleaning up your sonic logs, including free-form editing and automatic despiking routines. Additional features include the ability to create synthetic logs deterministically from other logs. These include synthetic sonic from GR/density/neutron, and density from GR/sonic/neutron. These may be used to verify the validity of original sonic and density logs.

Synthetica allows you to import seismic traces from 2D or 3D SEGY files and display them next to the generated synthetics. When creating a synthetic you will also be able to display other new items that have been created, including; time/depth curve from sonic integration, an interval velocity curve, an average velocity curve and the reflection coefficients. All of the curves can be displayed in time or depth.

Synthetica also adds another dimension to LESA. By using LESA and Synthetica together you have a 1D seismic modeling system allowing the user to model the seismic response of petrophysical edits made to sonic and density logs. This editing feature will give you the ability to create a more accurate/reliable synthetic.

Users can now perform forward seismic modeling. Modify your logs to include any projected sonic log changes as a consequence of changing porosity, grain density and fluid saturations. You can then regenerate your synthetic to see the seismic response created by these modifications.

RIS-Info (Reservoir Integrated System Information)

RIS-Info is a highly flexible presentation package for well information (wireline logs, drilling, mud log, geological and engineering data) designed for a PC running under Microsoft^® Windows™. Data may be imported from multiple LIS/LAS/ASCII files. Even increment data is not required - i.e. core data is kept at discreet depth points. The user may setup customized depth plot templates using a nearly unlimited number of tracks and curves. The user may color fill between curves. The setup of templates is designed to be very easy, making use of Wizards. The user may also annotate lithology, geologic modifiers, engineering symbols and text. All annotations are saved into the database for later retrieval. RIS-Info has various command line options, DDE connections and OLE automation to allow the software to be linked to other applications. Output may be sent to any Windows supported device, in either full color or black and white.

RIS-View (Reservoir Integrated System Viewer)

RIS-View is a quick and simple file viewer designed for a PC running under Microsoft^® Windows™. RIS-View provides the ability to open files in LIS, LAS, LBS, and various raw ASCII formats. The user may use RIS-View to visualize raw data or data analyzed in other applications. Data may be presented in color on provided depth plot templates, or user may setup customized templates using a nearly unlimited number of tracks and curves. The user may color fill between curves. The setup of templates is designed to be very easy, making use of Wizards. RIS-View has various command line options, DDE connections and OLE automation to allow the software to be linked to other applications. Output may be sent to any Windows-supported device, in either full color or black and white.

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DIGIRULE INC.

FastLog

This well log digitizing system is a software package specifically designed to take full advantage of the features of the Rat, a hand held digitizer invented by digiRULE. Speeds of up to 100,000 per 8 hour shift have been reported.

The software uses a proprietary regridding technique which compensates for poorly reproduced copies and provides constant tracking, scale checking and correction as the log is digitized. Any length of the log can be digitized on any flat surface without taping down and with only one initial calibration. Our unique foot pedal Rat Pad allows the operator to input data by pressing on the Rat Pad with a foot. Switch from point mode to stream mode by simply pressing down on the Rat Pad. The interactive graphics display allows the operator to always have a visual verification of the log data as it is digitized and hard copy plots can be produced to any scale and report quality.

Synthetic Seismograms

The synthetic seismogram program produces results in a quick, cost effective manner. It includes full CAD capability for editing or addition of objects and text. Features include: unlimited number of wavelets, amplitude and phase spectra are plotted, smooth interpolation used for wave resampling, templates allow for reconfiguration of plot layouts.

Crosslog Suite

A complete log cross section generation system with built in CAD capability for maximum flexibility in drawing structural or
stratigraphic cross sections. There is no need to set up maps or projects, just select the logs and go. Crosslog allows you to use either digitized logs in LAS format or scanned logs in TIF format or both. Includes LogEdit (raster version) and RED (raster editor for depth registration).

Donovan Enterprises Ltd.

Telephone: (403) 286-7055
email: Harold@petrolog.org
Dynamic Link: http://www.petrolog.org/

What is LAS log analysis?

This is a Windows (95 and greater) or NT based log analysis program that uses the Canadian Well Logging Society LAS (log ascii standard) files for data input. The user is prompted for the required parameters. Analysis is accomplished using simultaneous equations to a maximum of 8 input values (logs), solving for 9 unknowns. The results are displayed in spreadsheets containing graphics and numerical data (input and calculated values). This is a single well/single zone stand-alone program. The output spreadsheet (name.xls) and output file (name.las) can be used in conjunction with other programs. The output parameters from the cut-off/summary are mappable. Included with the download is a Demo.las that can be used to test the program. Also a text file named DemoCore.txt is included to test the core/log functionality with a text file as input. Core data can also be input via name.las files.

What is Manual Entry log analysis?

This is a Windows (95 and greater) or NT based log analysis program that prompts the user for; information about the well, from-to log values, logging units, and other parameters. The entered data is saved for: editing, appending and analyzing. Analysis is accomplished using simultaneous equations to a maximum of 8 input values (logs), solving for 9 unknowns. The results are displayed in spreadsheets containing graphics and numerical data (input and calculated values). This is a single well/single zone stand-alone program. The output spreadsheet (name.xls) and output file (name.las) can be used in conjunction with other programs. The output parameters from the cut-off/summary are mappable.

Future enhancements

If you have suggestions, which you are willing to give and they have broad applicability and can be incorporated in the programs, I will attempt to include them in future releases.

Why are they free?

I wrote the programs for my personal use and reasons. Now I feel others should take advantage of their value. The programs were written with, a short learning curve and ease of use being among the primary objectives. Optionally, in-depth instruction is available for a fee, which is another reason for the programs being available free of charge.

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