--> ABSTRACT: Integration of Geostatistical Techniques and Intuitive Geology in the 3-D Modeling Process, by Christian J. Heine and D. H. Cooper; #91019 (1996)
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Integration of Geostatistical Techniques and Intuitive Geology in the Previous Hit3-DNext Hit Modeling Process

Christian J. Heine and D. H. Cooper

The development of Previous Hit3-DNext Hit geologic models for reservoir description and simulation has traditionally relied on the computer derived interpolation of well data in a geocelluar stratigraphic framework. The quality of the interpolation has been directly dependent on the nature of the interpolation method, and ability of the interpolation scheme to accurately predict the value of geologic attributes away from the well. Typically, interpolation methods employ deterministic or geostatistical algorithms which offer limited capacity for integrating data derived from secondary analyses. These secondary analyses, which might include the results from Previous Hit3-DNext Hit seismic inversion, borehole imagery studies, or deductive reasoning, introduce a subjective component into what would otherwise be restricted to a purely mathematical treatment of geologic data.

At Saudi ARAMCO an increased emphases is being placed on the role of the reservoir geologist in the development of Previous Hit3-DNext Hit geologic models. Quantitative results, based on numerical computations, are being enhanced with intuitive geology, derived from years of cumulative professional experience and expertise. Techniques such as template modeling and modified conditional simulation, are yielding Previous Hit3-DNext Hit geologic models, which not only more accurately reflect the geology of the reservoir, but also preserve geologic detail throughout the simulation process. This incorporation of secondary data sources and qualitative analysis has been successfully demonstrated in a clastic reservoir environment in Central Saudi Arabia, and serves as a prototype for future Previous Hit3-DTop geologic model development.

AAPG Search and Discover Article #91019©1996 AAPG Convention and Exhibition 19-22 May 1996, San Diego, California