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Interactive structural interpretation of dip data


 

Geodes Software

 (Geological Dip Examination System)

Problem

Even great looking seismic can be misleading. And seismic quality is often fair or poor in many prolific petroleum provices (e.g., sub-salt, sub-volcanics, complex structure). Moreover, many important structural features fall below the resolution of even modern, 3D seismic.

That's why you've spent a small fortune acquiring image logs and dip logs, which provide direct, in-hole control on your structure. But what happens away from the wellbore? Tadpole plots only indicate the dip at the wellbore and image logs only show the inside of the wellbore. What's worse, tadpole plots can be difficult (or impossible) to interpret; inaccurate; or completely misleading.


Solution

With our Geodes software, now you can see what's really down there! Geodes implements several innovative techniques in dipmeter analysis, including SCAT , enabling you to analyze your dipmeter data quickly, accurately, and completely. But that's not all. Geodes allows you to predict structure away from your well by converting the results of your dipmeter analyses to local structure sections and maps.

Features

. Identify and remove false data points (processing artifacts) from machine-picked image logs and dip logs;
. Filter the data; and
. Identify domain boundaries (surfaces across which the structural axis changes abruptly).
. For each domain:
   o Determine the structural setting (planar or folded);
   o Determine the strike and dip (planar domains) or trend and plunge (folded domains);
   o Generate plots of apparent dip vs. depth parallel (Longitudinal or "L" Plot) and perpendicular (Transverse or "T"    Plot) to
      strike or trend;
   o Fit trend lines to the data on the T and L Plots;
   o Pick important structural surfaces (crest, trough, hinge, inflection, plunge-reversal) from the geometries of the T- and
      L-Plot trend-lines;
   o Pick potential unconformities and faults (including those that are difficult or impossible to see on Tadpole Plots, seismic,
      and log correlations); and
   o Semi-automatically remove structural dip on a foot-by-foot basis to examine the depositional dips.
. Convert the analysis of the dip data into local cross sections;
. From the local cross sections, compute local structure maps;
. Export the local structure maps to other mapping and modeling packages so that all of the structural control extracted from the dip data by Geodes can be incorporated in the maps and models generated with these other packages.