--> ABSTRACT: Reservoir Characterization Using 3D Technology: Case Studies, by B. W. Blackwelder and J. W. Steen; #91021 (2010)

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Reservoir Characterization Using 3D Technology: Case Studies

BLACKWELDER, BLAKE W., and JACK W. STEEN

3-D reservoir analysis technology was used to derive a more accurate characterization of reservoirs, while at the same time, to provide approximately a ten-fold increase in work productivity. Structures and stratigraphic features from the onshore and offshore Gulf of Mexico were analyzed. 3-D analysis was used to automatically determine principal reservoir geometry, to examine well placement within this geometry, to examine barriers and partitions within reservoirs, to assess volumes of reserves in unpenetrated or unproduced zones, and to plan future well geometries. The most important parameters to reservoir characterization (volume, connectivity/homogeneity, and geometry) were determined quickly through interactive utilities. Differing geometries of different qualities of reservoir were determined by altering search criteria within the seismic volume. Automation of this process allowed investigation of a wider range of scenarios than would be possible using conventional techniques, leading to a more accurate interpretation with shorter turn-around time. In addition, reservoir volume autodetection provided calibration data for conventional isopachous sand volume and original oil in-place interpretations. The data can be used as a basis for fluid flow studies, or for discovery of development opportunities. Reservoir performance can be better understood by examining internal architecture using VOR-like controls to step through detected reservoirs in a slice-wise fashion. The information gain coupled with reduced cycle time makes 3-D analysis extremely cost effective. 

AAPG Search and Discovery Article #91021©1997 AAPG Annual Convention, Dallas, Texas.