PowerLog 3.0

Well Log Petrophysical Analysis

PowerLog® is used every day by petrophysicists, geologists, reservoir engineers and others involved in oil field appraisal and development. Unlike other products on the market, PowerLog works the way you do—letting you drive the order of actions and the amount of guidance provided. You can work on multiple wells, data physically located anywhere in the world, and as an individual or as part of a team. PowerLog is truly multi-well and multi-user. Its ease of use and intuitive interface are a testament to the feedback customers have provided over the past 20 years.

"With its user programming, data editing, multi-well interpretation and batch processing capabilities considered, PowerLog is perhaps the best value-for-the-dollar of any formation evaluation software product on the market today."—Paul Connolly, Chief Petrophysicist, EOG Resources Houston

Tuned for Standard Petrophysical Workflows

PowerLog has everything you need to perform petrophysical analysis and view the results. All standard data formats are supported and easily loaded including array data.

Once data is loaded it can be inspected in a variety of viewers, including logplots, crossplots, basemaps, and histograms. The Basemap viewer allows you to see your wells relative to one another with an overlay of cartography, contours and attributes.

To assist in correcting and analyzing the data, PowerLog provides processors and leading algorithms such as Archie, Dual Water, Waxman Smits, and Juhasz. Every action in PowerLog is tuned to run fast and work the way you do.

"For our business, the multi-well capability is very powerful. We can literally process thousands of wells at one time. PowerLog's multi-well capability is far superior to any other program that I have seen to date. We just finished a 100-well project in four days. That's the power of PowerLog for you!"—Jim Wallace, Principal and Petrophysicist, Hunt Wallace and Associates

On Top of Your Data

Data is the heart of petrophysical analysis—and PowerLog. All data are available for your inspection, in both graphical and tabular form. Any item managed by PowerLog—from a well to a top, curve or other—can be selected, viewed and edited. Any collection of items can be grouped together, and these groups are also managed as items that can be selected, viewed and edited.

Every change you make in PowerLog, whether through a process, viewer or table, automatically updates everywhere the data appears. A change made in the crossplot viewer, for example, will cause an update to the histogram view. Likewise, a change in one process will update others that share the data.

PowerLog honors the original imported data and automatically links key non-log data to processes based on user selection. Log data is commonly available in a mixture of increments between 6 inches and as little as 1/10 inch. PowerLog honors these measures and handles interpolation and extrapolation during processing and output so you don't have to do so. Both units and measures are preserved, making the analysis as true to the data as possible. For example, when data such as R_m appears in the log header, it can be captured and fed directly to the associated process so that when a correction is needed the parameter is already set.

Quick to Action

Petrophysical analysis by its very nature is a highly visual process. When you see a problem in a logplot or histogram, it makes sense that you would want to make a correction right there. PowerLog makes it easy for you to do just that. All changes are immediately reflected everywhere the affected data appears.

When viewing a logplot, for example, you may see a need to make a depth shift. All you need to do is select editing mode and make your adjustment. This is very fast and completely logical.

Normalization is another change that is easily made through either the crossplot or histogram. For example, if the calibration was off in one well, you can fix it with a bulk shift or gain and offset. PowerLog supports dual interval display during multi-well editing—you simply identify a soft interval and a hard interval and use them to calibrate the entire log. PowerLog can even auto-normalize if you have a series of wells that require the same fix.

As a final example, the Synthetic Curve Generator allows you to predict curves in wells where data is missing and to automate bad-data editing. For a curve that has problems, select a good section and PowerLog uses linear regression analysis to fix the problem. PowerLog outputs the equations, which you can cut and paste in to a MathPack if you want. The Synthetic Curve Generator can also be used for facies classification.

Advanced interpretation capabilities let you calculate clay volume, porosity, lithology and water saturation with a variety of simple and complex lithology and shaly sand modules. PowerLog also provides environmental corrections from all of the major logging companies including Schlumberger, Halliburton, Baker Atlas, and Sperry-Sun.

Adaptive & Flexible

Every project is different. Petrophysicists need the flexibility to approach each one in the most effective manner for that project. PowerLog works the way you do. No structured workflow manager is required. The menu bar and user interface guide you through the processing steps to complete your analysis. These natural processing steps follow common practice, but allow deviation at any point. PowerLog proposes structure, it does not impose it.

At every step of your analysis, PowerLog provides processes and algorithms that you can use to correct, process and display data. Among the processors are basic, Vshale calculator, simple and complex shaly sand analyses, and multimin lithology. Correction editors include depth shift, baseline shift, trend and square, patch, splice and environmental corrections.

Because critical decisions depend on your analysis, a clear and detailed history of your actions is imperative. PowerLog keeps a record of every action taken that affects the data. You do not need to undertake a massive documentation effort to ensure that months or years later the project methodology is still understood.

You can also undo or redo actions, and recover items from the trash. These safeguards turn potential disasters into easily reversed mistakes. You can feel free to experiment knowing that you can change your mind if you don't like the result.

Customizable & Extensible

PowerLog provides the means to go beyond its standard capabilities through user programming and optional integrated products. APIs are available for C# and VB.Net. With these APIs, you can create custom interpretation routines, call specialty algorithms, and integrate with other software, for example.

PowerLog works across a network and can link to data anywhere. You can use one computer to access PowerLog on another and work with data on yet another. PowerLog is also completely portable. All you need is a laptop to carry PowerLog to the well site, out to the rig or onto an airplane. When you reopen the application it will open where you left off, with all the viewers and data just as you left them. PowerLog works the way you do.

Two optional integrated products are available to extend PowerLog capabilities:

• Statmin uses a probabilistic model to calculate lithology, mineralogy, and/or porosity and can easily adapt to the needs of the analyst. Any well log or computed curve that responds to formation bulk volumes can be used as an input. Statmin solves balanced, over-determined, and under-determined models. In addition to the mineral volumes, a reconstructed version of each input curve is computed and output.

• PowerLog - RPM integrates the log analysis of PowerLog with rock physics elastic modeling. RPM enables a fundamental modeling approach—a petrophysical rock model is used to derive the effective elastic rock properties from fluid and mineral parameters, as well as rock structure information. The model parameters are calibrated by comparison of the synthetic to the available elastic sonic logs. RPM supports inclusion models and contact models including Stanford cemented spheres scheme and 2. Industry standard methods include Xu & White, self-consistent, and Krief-Gurevich-Goldberg. Bound models include Voigt, Reuss, and Hill. RPM supports Hahin-Shtrikman upper and lower bounds, plus in-house velocity models. Gassmann fluid substitution and complete anisotropy support are also provided.

In addition, PowerLog is available in a limited edition as PowerLogGEO, which is designed primarily for geologists and engineers who want to get a quick look analysis of their logs, as well as techs who just need to do data importing, editing and presentation. The results from PowerLogGEO can then be taken by PowerLog and further processed.

PowerLog Features

PowerLog is a Microsoft Windows-based product with a wide array of features, including:

• Import (LAS, DLIS, LIS ASCII)
• Import and view image files (tif, jpg, emf, etc.)
• Logplot
• Crossplot and Multi-well Crossplot
• Histogram and Multi-well Histogram
• Basemap
• Tabular Listing
• Visual Collage / Cross Section
• Journal File Manager
• Edit (Rescale and Fill Gap)
• Edit (Depth Shift, Baseline Shift, Splice)
• Edit (Patch, Trend/Square, Filter)
• "Quicklook" Interpretation
• Synthetic Curve Generator
• Reports (Curve Stats, Summation, Sensitivity)
• Batch Reports (Curve Stats, Sum, Sensitivity)
• Export (LAS, LAS Batch, LIS, ASCII)
• Mathpack and standard log functions
• N-D and N-S Crossplot Porosity and Neutron Matrix
• TVD, TST, TVT
• User Programming
• Environmental Corrections
• Clay Volume
• Multimin/Complex Lithology
• Shaly Sand
• Water Saturation
• Powerbatch