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Currently, numerous oil and gas companies are directing their efforts toward the exploration and exploitation of the liquids maturity window of the Woodford Shale in Oklahoma. This play began in the Cano field area and has recently expanded to the South Central Oklahoma Oil Province (“SCOOP”). The play may also expand to the north to include the Woodford on both sides of the Nemaha Ridge. Exploration and exploitation of the Woodford is expect to continue for several years and there has not been a comprehensive regional study of the Woodford that links reservoir properties to well performance.
The Integrated Reservoir Solutions Division of Core Laboratories is proposing to interested companies participation in a multi-company (operators’ consortium), geo-engineering, regional study of the Woodford Shale in Oklahoma. This project consists of the characterization and evaluation of numerous conventional cores, rotary sidewall cores, and drill cutting samples taken from multiple wells targeting the Woodford Shale. Specifically, the prospective Woodford section will be analyzed for geological, geochemical, petrophysical, geomechanical, and production properties. These data will be integrated with well logs, stimulation designs, and production test information. This large and searchable database will provide operators with valuable information not only on their own wells, but also on other operator’s wells.
Each company joining the project will be required to contribute core material from two (2) wells for analysis, evaluation, and inclusion into the database. The cores must be through the Woodford section. It is anticipated that conventional cores from a minimum of twenty-five (25) wells will be included in the project. Each company may also contribute drill cuttings and/or rotary sidewall cores from one “reconnaissance” well.
The primary objective of this project is to provide operators with measured geological, geochemical, petrophysical, geomechanical, and production properties of the Woodford Shale in order to improve their formation evaluation and to optimize stimulation and production. Our work suggests that understanding the similarities and differences in the section on a regional basis is the key to successful exploration and exploitation. The resultant database will be an invaluable tool to operators in evaluating, comparing, and designing completion and stimulation methods. Specifically, the project objectives are as follows:
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