--> Abstract: Outcrop Characterization, 3D Geological Modeling,"Reservoir" Simulation and Upscaling of Jackfork Group Turbidites in Hollywood Quarry, Arkansas, by J. Camilo Goyeneche and Roger M. Slatt; #90039 (2005)

Datapages, Inc.Print this page

Outcrop Characterization, 3D Geological Modeling,"Reservoir" Simulation and Upscaling of Jackfork Group Turbidites in Hollywood Quarry, Arkansas

J. Camilo Goyeneche and Roger M. Slatt
The University of Oklahoma, Norman, OK

This research was designed to build a 3D geological model of a 3D outcrop for “reservoir” flow simulation that can address the effects of small-scale (‘subseismic') interwell heterogeneities on potential production problems in analog deepwater oil and gas reservoirs.

Dimensions of Hollywood Quarry are 1160x730x150ft. The quarry exposes in 3D the upper Jackfork Group turbidites, which are often used as an outcrop analog for deepwater reservoirs in the Gulf of Mexico and elsewhere. A variety of pebbly and sandy turbidite facies are folded, cut by faults and fractures, and separated by laterally continuous shales.

Techniques used to characterize the quarry have included: behind-outcrop coring, outcrop gamma-ray logging, measured stratigraphic sections, sequential photography of quarry walls, Digital Orthophoto-Quadrangle mapping (DOQ), Ground Penetrating Radar (GPR), Global Positioning System (GPS), high-resolution seismic reflection, and GPS laser gun positioning of geologic features in 3D space.

The west wall has been quarried back within three feet of the first inline of a previous 3D GPR survey and coring operation. The strata imaged along inline #1 are now exposed at the quarry wall. Core and photomosaic descriptions superimposed on inline #1 show good bed correlations, and reveal small scale faults. Similar features are observed from seismic reflection. Seismic reflection and a long core provide details of the geology beneath the quarry floor which can be correlated updip to the east quarry face.

Outcrop walls, faults, measured sections, GR logs, and photomosaic locations have been georeferenced with GPS and GPS laser gun to create a GoCadTM 3D geological model.

The 3D geologic model includes spatially-oriented stratigraphic and structural features, and various upscaling combinations for evaluating the constraints that a coarser-scale grid places upon the results of “reservoir” flow simulation performed using different drilling scenarios.

AAPG Search and Discovery Article #90039©2005 AAPG Calgary, Alberta, June 16-19, 2005