Over Pressure Prediction (2 day course)
Anomalous pressures typically in excess of expected hydrostatic values cost the industry hundreds of millions of dollars a year. Shallow water hazards are a class of over pressure problems which dramatically impact production costs and safety. Our ability to predict pressures has improved with time, dating to the early work of Eaton to modern routine services offered by contractors. An algorithm designed to predict pressure must be calibrated against normal expectations for a particular geological setting. This calibration is fundamental to any scheme. The most important aspect of pore pressure prediction is the clarity of the dependent variable observation. Typical variables are seismic velocity, resistivity, shale density, etc. You will understand what drives the over pressure signature in rocks and sediments. You will learn of resolution and possible ancillary attributes for pressure detection. Standard methods will be discussed. Future or emerging technologies will be discussed. You will also develop an understanding of the over pressure mechanisms and the effects on associated properties such as porosity and temperature.

  Topics to be covered:

1)  Review of over pressure concepts (mineralogic phase transitions, compartments, etc.)
2)  Review of pore pressure prediction methods (post- and pre-diction)
3)  Review of normal compaction trends
4)  Seismic models for pore pressure prediction
5)  Emerging technologies for pore pressure prediction

 

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Last modified: 08/14/04