Woodford Shale

Woodford Shale ImageLocated in southeastern Oklahoma, the Woodford shale play has been drilled for about 10 years. Only the Barnett shale in Texas has been producing natural gas longer than the Woodford shale. Devon Energy drilled the first well into the Woodford shale formation in 2005, and since then numerous petroleum companies have acquired acreage and launched their own drilling programs. Current estimates are that the Woodford shale holds approximately 4 tcf of natural gas.

Of the numerous companies drilling in the Woodford shale, Houston-based Newfield Exploration and Oklahoma City-based Devon are the largest producers. Both companies have sold off much of their offshore assets in the Gulf of Mexico and elsewhere in order to focus their attention on unconventional resources such as the Woodford and other shale plays

Woodford Shale Map

Woodford Shale News

OUACHITAS NEED MORE EXPLORATORY DRILLING

Apr 9, 1990 Neil H. Suneson, Jock A. Campbell Oklahoma Geological Survey Norman, Okla. The Ouachita Mountains in southeastern Oklahoma and western Arkansas are part of a mostly buried late Paleozoic fold and thrust belt that extends from Alabama to northern Mexico.

U.S. BRIEFS

May 14, 1990 BROWN & ROOT U.S.A. INC. finished installing underground civil and foundation packages for two 35,000 kw cogeneration units it is building for Oklahoma Gas & Electric Co. at Conoco Inc.'s Ponca City, Okla., refinery. The plants will supply electricity to OG&E and process steam to Conoco. HADSON CORP., Oklahoma City, reached an amended power sales contract with Niagara Mohawk Power Corp. for a 79,000 kw gas fired cogeneration project in Rensselaer, N.Y. TEXAS EASTERN

FUSSELMAN PALEOTOPOGRAPHIC TRAP SEARCH PAYS OFF IN MIDLAND BASIN

Oct 1, 1990 Louis J. Mazzullo Geological Consultant Midland, Tex. Carbonates of the Lower Silurian Fusselman formation of the Permian Basin have long been attractive hydrocarbon targets to many operators because they comprise some of the most prolific, deeper (sub-Woodford shale) targets in that area. Exploration for the Fusselman has historically emphasized the application of seismic data to locate anticlinal and fault-bounded closures in the subsurface. These structural leads are usually defined by

FERC TRIES TO ASSESS U.S. GAS DELIVERABILITY

Nov 12, 1990 Nearly 25% of Oklahoma's peak day natural gas production during December 1989 supply shortfalls is unaccounted for in a preliminary report of a Federal Energy Regulatory Commission task force studying U.S. gas deliverability. During Dec. 10-27, 1989, Oklahoma wells produced an estimated 9.3 bcfd of gas, exceeding by 2.3 bcfd reported consumption of 1.7 bcfd and estimated net transmission of 5.3 bcfd. The results appeared in the draft report of a case study released by FERC's

WOODFORD SHALE IN THE ANADARKO BASIN: COULD IT BE ANOTHER 'BAKKEN TYPE' HORIZONTAL TARGET?

Dec 3, 1990 Timothy C. Hester James W. Schmoker Howard L. Sahl U.S. Geological Survey Denver The Woodford shale is one of several organic rich "black" shales of late Devonian and early Mississippian age present in basins of the North American craton. Other examples of similar age include the Antrim shale of the Michigan basin, the new Albany shale of the Illinois basin, the lower and upper members of the Bakken formation of the Williston basin, the Exshaw formation of the Alberta basin, and the "Devonian"

U.S. BRIEFS

Jan 7, 1991 AMOCO PRODUCTION CO.'S 1-21 Cindy wildcat in Latimer County, Okla., flowed 10.9 MMcfd through a 32/64 in. choke with 1,750 psi flowing tubing pressure from pay at 13,584-616 ft in Pennsylvanian Spiro-Wapanucka after acid and fracture treatment. The discovery is in the Ouachita thrust belt of the Arkoma basin, about 6 miles east of Wilburton and 8 miles southwest of Red Oak gas field. Gas from the well is being sold through Amoco's Panola gathering system.

HOW 12 GEOCHEMICAL METHODS FARED IN GERT PROJECT IN PERMIAN BASIN

May 13, 1991 Gerry G. Calhoun Independent Geologist Midland, Tex. Geochemical Evaluation Research Team (GERT) is an experiment conceived to identify surface geochemical exploration methods that are effective in finding oil. Many of the methods use technology developed in the last 5 years. In fact, one of the challenging jobs for the geochemical explorationist is keeping up with new techniques and improvements. The way to minimize dry holes is to screen prospects with carefully selected geochemical

U.S. HORIZONTAL DRILLING ACTION STILL SPREADING

May 20, 1991 The U.S. campaign to drill horizontal and high angle wells continues to spread to new horizons, fields, and basins. Among recent action are projects planned or under way in Mississippi, Kentucky, Texas, Louisiana, Arkansas, Oklahoma, New Mexico, Colorado, Wyoming, Montana, North Dakota, and California. All horizontal locations are exploratory wells unless indicated otherwise. Coho Resources Inc., Houston, completed the first horizontal well in Soso field, Jasper County, Miss.

COMPARTMENTATION, FLUID PRESSURE IMPORTANT IN ANADARKO EXPLORATION

Jul 8, 1991 Zuhair Al-Shaieb Oklahoma State University Stillwater, Okla. Basin compartmentation, introduced by Bradley1 and Powley,2 is an important concept in the exploration and production of hydrocarbons in deep sedimentary basins. Compartmentation can arise in a number of distinct ways through the interplay of sedimentological, mechanical, and chemical factors. These compartments are most easily recognized by their abnormal fluid pressures.

LOCATING NIOBRARA FRACTURES-1 USING RESISTIVITY TO ASSESS NIOBRARA FRACTURE PATTERNS FOR HORIZONTAL WELLS

Sep 2, 1991 Reed A.Johnson, R. Timothy Bartshe Energy Foundation Inc. Lakewood, Colo Recent interest in U.S. horizontal drilling has largely focused on vertically fractured plays such as the Bakken shale and Austin chalk. The Upper Cretaceous Niobrara formation, the chronological equivalent of the Austin chalk, has recently been targeted as a candidate for horizontal drilling in the Denver basin and other areas of the Rocky Mountains.

ENRON SEES MAJOR INCREASES IN U.S. GAS SUPPLY, DEMAND

Oct 7, 1991 Margaret M. Carson, Bruce Stram Enron Corp. Houston Enron Corp., Houston, in an extensive study of U.S. natural-gas supply and demand through the year 2000, has found that the U.S. gas-resource base is 1,200 tcf. Despite current weaknesses in natural-gas prices, demand growth will be strong although affected by oil-price assumptions. Highlights in the areas of reserves and production include gains in both categories in the Rockies/Wyoming, San Juan basin, and Norphlet trends (offshore Alabama).

FRACTURED ZONES DRAW HORIZONTAL TECHNOLOGY TO MARIETTA BASIN

Mar 30, 1992 M.G. Whitmire Bandera Petroleum Inc. Tulsa Vertically fractured, low permeability reservoirs have long frustrated the efforts of oil and gas operators. Oil men, risk takers by nature, cannot resist the challenge to try to beat the average, subeconomic well and get the better wells. The advent of horizontal drilling technology gave new life to these hopes, and a number of drilling mini-booms developed in a diverse, widespread variety of vertically fractured U.S. reservoirs. Results to date have

STUDY FINDS NEED FOR BETTER DATA ON U.S. GAS

Sep 28, 1992 The U.S. natural gas network needs an information system that can reliably and accurately report gas deliverability, a federal study says. A joint Federal Energy Regulatory Commission and Department of Energy task force took 2 years to prepare the study.

MARKETS -- NOT REGS -- HIKE GAS PRICES

Oct 5, 1992 Gas prices are increasing in the U.S. because of market fundamentals, not because of new gas proration schemes, a panel of state regulators agreed at the International Association of Drilling Contractors' annual meeting. Regulators from Texas, Louisiana, and Oklahoma, states that account for about 75% of U.S. marketed gas production, said they are changing gas proration systems in their states to keep up with evolving markets. For drilling contractors, those markets involve an alarming

INDUSTRY BRIEFS

Oct 26, 1992 TRANSCANADA PIPELINES, Calgary, lot contracts valued at more than $200 million to Westinghouse Electric Corp. to supply two 150,000 kw combined cycle power plants in North Bay and Kapuskasing, Ont. The plants will use waste heat from TransCanada's pipeline compressors and natural gas from western Canada to fuel combined cycle power generation.

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