--> --> ABSTRACT: 3-D Geologic Modeling and its Applications for the Clearwater Formation Reservoir, Cold Lake, Alberta, Canada, by S. K. Leung, C. E. Belanger, R. J. Sheptycki; #91003 (1990).
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ABSTRACT: 3-D Geologic Modeling and its Applications for the Clearwater Formation Reservoir, Cold Lake, Alberta, Canada

S. K. Leung, C. E. Belanger, R. J. Sheptycki

Three-dimensional models were built to mimic the geology of the Clearwater Formation reservoir at Esso Resources Canada Limited Cold Lake production operations. Each Previous HitmodelNext Hit consists of 3.9 million cells, covers an area of 376 km2 (144 mi2), and encompasses the Esso in-situ development area. The models, facies, bitumen saturation, and sand quality were built using stratigraphic surfaces (nonparallel surfaces) to guide the interwell data interpolation process.

The Lower Cretaceous Clearwater Formation in the Cold Lake area contains 11.3 billion m3 in place (71 billion bbl) of bitumen requiring in-situ thermal stimulation processes for recovery. Within the development area, the facies are dominantly deltaic and include clean, rich, outer stream mouth bar; shaleprone inner stream mouth bar; and offshore transition sands. Sand quality affects resource distribution and reservoir performance. Erosional and downlap surfaces make the modeling process more complex than simple layer-cake, parallel surface modeling.

The procedure for building the three-dimensional geologic Previous HitmodelNext Hit included (1) data gathering, (2) data editing, (3) data preparation, (4) geologic horizon gridding, (5) well modeling, (6) data interpolation, and (7) Previous HitverificationTop. Each of the models can be merged with the other. Various cutoffs with any combination of the three modeled reservoir parameters can be applied in information retrieval. These merge and search capabilities are very useful for sensitivity studies, resources distribution calculation, reservoir quality displays, production problem solving, and various statistical analyses. Moreover, the three-dimensional models can be input directly into the Exxon reservoir engineering simulator.

AAPG Search and Discovery Article #91003©1990 AAPG Annual Convention, San Francisco, California, June 3-6, 1990