--> ABSTRACT: Reservoir Description from Seismic Lithologic Modeling, Part 2: Substantiation by Reservoir Simulation, by Marc De Buyl, Tom Guidish, and Shahid Ullah; #91035 (2010)
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Reservoir Description from Previous HitSeismicNext Hit Lithologic Previous HitModelingNext Hit, Part 2: Substantiation by Reservoir Simulation

Marc De Buyl, Tom Guidish, Shahid Ullah

Two independent reservoir models were constructed for an oil-bearing channel-sand reservoir in the Taber-Turin area, Alberta, Canada. The first reservoir description was based on log and core Previous HitdataNext Hit from six producing and two dry wells drilled within a part of the field on which a three-dimensional Previous HitseismicNext Hit survey was acquired. The second reservoir model was supplemented by petrophysical parameters derived from Previous HitseismicNext Hit lithologic Previous HitmodelingNext Hit of the three-dimensional Previous HitseismicNext Hit reflection Previous HitdataNext Hit.

This new Previous HitforwardNext Hit Previous HitseismicNext Hit lithologic Previous HitmodelingNext Hit technique can unravel the wavelet interference effects of closely spaced reflectors and allow reliable estimates of reservoir parameters for thin intervals. In this study, a detailed geologic model of the reservoir, enhanced by the results of the lithologic Previous HitmodelingNext Hit technique, was constructed. This model depicts subtle structural and stratigraphic features that cannot be mapped from the available well Previous HitdataNext Hit. Structure maps of the top of the reservoir and maps of the petrophysical parameters of the producing interval were developed. These include thickness, interval velocity, porosity, and porosity-thickness maps.

The increased accuracy in predicting reservoir variation attained by incorporating Previous HitseismicNext Hit control is demonstrated by comparing the projections of respective model parameters at two new well locations that were not included in the Previous HitmodelingNext Hit.

A 20% increase in the calculated pore volume by the Previous HitseismicTop-based method over the well-only approach will potentially influence economic decisions to be made in field development. The location of further development drilling and the planning of secondary-recovery methods will benefit greatly from the seismically enhanced information developed in this study.

AAPG Search and Discovery Article #91035©1988 AAPG-SEPM-SEG Pacific Sections and SPWLA Annual Convention, Santa Barbara, California, 17-19 April 1988.