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Book Chapter

The Geological Scheme

Published:
January 01, 2009

Abstract

A major role for the production geologist is to establish the geological scheme for the field. This is the conceptual scheme, which depicts the sedimentological and structural configuration of the reservoir. Once a geological scheme is in place, it can be integrated with production data to produce a flow geology scheme. This is a description of how the various geological elements in the reservoir control the patterns of fluid flow. The conceptual geological scheme for the larger fields will be represented as a geological model on a computer to be used by the geologist and the rest of the subsurface team. A computer representation can be built either as a series of 2-D maps or as a 3-D geological model (Figure 39).

The geologist will use these models to locate and target the remaining hydrocarbons within a field. Any large 10 pockets of oil identified in this way will be the basis for infill well drilling. The geological model can also be used to provide the framework for the reservoir engineer’s simulation model. The reservoir simulation tracks fluid flow within the reservoir and is the basis for predicting future production and reserves.

The workflow given here follows through from establishing a geological scheme to building a geological

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Contents

AAPG Memoir

Oil Field Production Geology

Mike Shepherd
Mike Shepherd
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American Association of Petroleum Geologists
Volume
91
ISBN electronic:
9781629810294
Publication date:
January 01, 2009

GeoRef

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