--> Abstract: Truncated Piurigaussian Method: A Case Study, by A. Galli, G. Le Loc'h, R. Eschard, and F. Geffroy; #90937 (1998)
[First Hit]

Datapages, Inc.Print this page

Abstract: Truncated Piurigaussian Method: A Case Study.

GALLI, Previous HitALAINTop, GAELLE LE LOC'H, REMI ESCHARD, FRANCOIS GEFFROY

The truncated plurigaussian simulation method has been developed to simulate complex heterogeneities in petroleum reservoirs. It uses classical experimental tools as proportion curves and indicator variograms, and further developments could be done which use improvements of these tool descriptions (non stationarity, use of seismic constraints). In this paper, the method will be briefly recalled. Even in the simplest case, it offers a lot of modeling possibilities. Applying it on real data, we will try several hypotheses, and then test the adequacy of these hypotheses compared to the data and to the geologist's implicit representation of the field. We will discuss how it can help to confront the geologist's qualitative ideas to the quantitative data, and to confirm them or not.

We will focus on two key points; the transformation of the lithotype into gaussian functions, which depends on the relationship between the lithotypes, and the characterization of the gaussian functions, which gives the anisotropies. Both steps imply a close collaboration between geologist and geostatistician. This collaboration will be illustrated on a detailed outcrop study in the penman series of the Paradox basin (Utah) which made it possible to build a conceptual model describing the transitions between aeolian, alluvial, fluvial and lacustrine environments. This geological model has been used to infer some parameters of this truncated plurigaussian method.

Finally, examples of simulations with several geological hypotheses are shown, and the adequation with the data is discussed.

AAPG Search and Discovery Article #90937©1998 AAPG Annual Convention and Exhibition, Salt Lake City, Utah