--> Abstract: Pre-Drill Pressure Prediction Provided by Multi-Dimensional Basin Modelling Techniques, by S. J. Duppenbecker, M. J. Osborne, and J. R. Bunney; #90923 (1999)
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DUPPENBECKER, S.J., M.J. OSBORNE, J.R. BUNNEY, R.A.B. Duncan (BP Exploration)

Abstract: Pre-Previous HitDrillNext Hit Pressure Prediction provided by multi-dimensional Basin Modelling techniques

Basin modeling tools were traditionally used to study basin development, source rock maturation, petroleum generation and expulsion.The emphasis was very much on understanding processes at the regional to semi-regional scale, and references to fluid flow was taken to mean migration of petroleum fluids. More recently, the same tools have been used more at a prospect-specific scale.

Relatively little attention has been given to the reconstruction of the pressure regime in basin modeling studies.The main overpressure generating mechanisms are disequilibrium compaction and gas generation, both of which can be quantitatively modeled. Understanding the past and present day fluid flow regime in the basin is an essential step to prediction of pressures at a prospect well location. In BPX calibration of models to observed data such as pressures, temperatures, measured in the borehole are an integral step in any basin modeling study. When the modeling techniques accurately reproduce the observed fluid pressures at known points of control, the models are able to predict pressures ahead of drilling at new locations in the basin.

In BPX such prediction of subsurface pressure and temperature is used by drillers and engineers for well planning and highlights potential drilling hazards.The presentation will concentrate on application of 2D and 3D basin modeling for predicting subsurface conditions (Pressure and Temperature) ahead of the Previous HitdrillTop bit. The results show why numerical models gained the respect of the wider user community - exploration geologists, geophysicists and drilling engineers.

AAPG Search and Discovery Article #90923@1999 International Conference and Exhibition, Birmingham, England