A Reservoir Study of the West Edmond Hunton Pool, Oklahoma
- Max Littlefield (Gulf Oil Corporation) | L.L. Gray (Gulf Oil Corporation) | A.C. Godbold (Gulf Oil Corporation)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1948
- Document Type
- Journal Paper
- 131 - 164
- 1948. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.5 Processing Equipment, 2.2.2 Perforating, 2.4.3 Sand/Solids Control, 1.6.9 Coring, Fishing, 5.6.2 Core Analysis, 5.8.7 Carbonate Reservoir, 5.2 Reservoir Fluid Dynamics, 1.10.1 Drill string components and drilling tools (tubulars, jars, subs, stabilisers, reamers, etc), 1.14 Casing and Cementing, 4.3.4 Scale, 4.6 Natural Gas, 5.8.2 Shale Gas, 5.4.2 Gas Injection Methods, 5.2.1 Phase Behavior and PVT Measurements, 1.6 Drilling Operations, 5.5.2 Core Analysis, 5.1.1 Exploration, Development, Structural Geology, 4.1.2 Separation and Treating, 1.2.3 Rock properties
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The West Edmond pool of Central Oklahoma, a limestone reservoir, has an area inexcess of 29,000 acres and as of Sept. 15, 1946, had produced 53 millionbarrels of oil from 731 wells at an average depth of 6900 ft. Water hasencroached into the reservoir along the west side of the pool and although thearea of water invasion is large the net volume of water influx is small,because encroachment has been primarily into a fracture system.
The most significant part of this study concerns the character of the Huntonreservoir. Geological study of cores of the producing section was made tosupplement core-analysis data. It was determined, that approximately 90 pct ofthe pore volume was contained in intergranular or sand-like porosity and 10 pctin fractures (intermediate porosity). The porous limestone is divided intoblocks by the fractures, although in the strongly dolomitic parts of theproducing section, fractures are less well developed. The low-permeabilityintergranular porosity, largely subsidiary to the high-permeability fractures,will produce oil into the fractures by evolution of solution gas. The fracturesin effect serve as drainage channels for production of oil from theintergranular porosity. Because of such a large difference in permeabilities ofthe two components, a high degree of by-passing will occur, and, accordingly,the economics involved in undertaking full-scale high pressure gas injectionoperations have been seriously questioned.
The West Edmond Hunton pool, which covers portions of Canadian, Logan,Oklahoma, and Kingfisher Counties in Central Oklahoma, is this largestreservoir at an average depth of approximately 6900 ft, and have yielded acumulative oil production in excess of 53 million barrels as of Sept. 15, 1946.in addition to wells completed in the Hunton limestone, 21 wells have beencompleted in the Bartlesville sand at a depth of approximately 6500 ft, whichhave produced a total of 730,000 bbl of oil. One small producer has beencompleted in Cleveland sand at a depth of 5700 ft. However, a study of only theHunton limestone reservoir will be presented in this paper.
The most significant phase of this study concerns the special type ofgeological core examination that was made in an effort to ascertain the typeand degree of porosity in the rock in accordance with lithologic types.
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