Bakken Shale

Bakken Shale ImageThe Bakken shale is primarily an oil play. It straddles the US border with Canada and runs through two states – North Dakota and Montana – and two Canadian provinces – Saskatchewan and Manitoba. The US Geological Survey estimates there are 3.65 billion barrels of recoverable crude oil in the Bakken, which would make it the largest oil field in the US outside Alaska. The Bakken is located in the Williston Basin, but not all of the basin includes the Bakken.

The Sanish-Three Forks area is located below the Bakken shale zone and is potentially another new oil reservoir. Brigham Exploration Co. has been active in this area. Natural gas is also found in some parts of the Bakken. The USGS estimates there is about 2.0 trillion cubic feet of gas and another 150 million barrels of natural gas liquids. Major players in the Bakken include EOG Resources, Continental Resources, and Enerplus Resources.

Bakken Shale Map

Bakken Shale News

OIL, GAS FUNDAMENTALS NEED WORK

Jun 4, 1990 U.S. oil and gas producers are demonstrating industry fundamentals that the Department of Energy should watch closely. In its pursuit of a national energy strategy, DOE cannot ignore recent oil production declines. Any effective response to those declines must involve improvements to fundamentals within the government's control.

DEVELOPMENT ECLIPSING EXPLORATION ONSHORE

Jun 4, 1990 G. Alan Petzet Exploration Editor Federal tax credits and horizontal drilling technology are fueling a large slice of onshore development in the U.S. So many profitable development prospects are available that exploratory drilling has sunk to the lowest level in recent years in many areas. Total drilling is picking up a little from 1989. The number of drilling permits issued in March rose 11.1% from February 1990, with the biggest increases in California and Texas. The first quarter figure,

U.S. BRIEFS

Jun 18, 1990 SOUTHERN CALIFORNIA GAS CO. plans to buy 227 MMcfd of spot gas in June at $1.42/MMBTU, the same price it paid through May 21, when it took 551 MMcfd of spot gas. A WILLIAMS PIPE LINE CO. line spilled more than 75,000 gal of diesel fuel into the Minnesota River from a leak at the Eden Prairie, Minn., river crossing just south of Minneapolis. Fuel spread about 8 miles downstream, and boat traffic was halted while it was contained. Williams officials blamed failure of a check valve and connected

MORE U.S. GAS PIPELINE PROJECTS SHAPING UP

Jun 25, 1990 Several U.S. gas pipeline projects continue to roll through the planning, permit, and contract signing phases. Here are the latest developments: Transcontinental Gas Pipe Line Corp. (TGPL) received approval from the Federal Energy Regulatory Commission to build its $60 million southern expansion project. Northern Natural Gas Co. received FERC approval to expand the east leg of its system in Iowa, Illinois, and Wisconsin by 199 MMcfd and signed seven firm transportation contracts.

DUAL OIL FIND HEATS WILLISTON IN SASKATCHEWAN

Jul 2, 1990 G. Alan Petzet Exploration Editor Saskatchewan appears to have its highest flowing oil wells since completion of several strong Devonian Winnipegosis reef oil discoveries in 1987 and 1988. Mark Resources Inc., Calgary, and Saskatchewan Oil & Gas Corp. (Saskoil) have drilled six wells in an area near Minton, Sask., about 100 miles south of Regina. The Williston basin wells are north of the U.S. border at Sheridan County, Mont. One well was dry, but the others are capable of flowing 500 b/d or

HORIZONTAL WELLS BOOST SOUTH TEXAS OIL FLOW

Jul 16, 1990 Oil production from Cretaceous Austin chalk horizontal wells in a South Texas field is 100 times greater than it was 1 1/2 years ago, officials of Oryx Energy Co., Dallas, have told the Texas Railroad Commission (TRC). Oryx said this increased production supports its position that temporary field rules on horizontal drilling in Pearsall field should be made permanent. TRC conducted hearings last week on the temporary rule providing a four-fold increase in horizontal well allowables, to 1,312

PETROLEUM POTENTIAL OUTLINED FOR NORTHERN ROCKIES, GREAT PLAINS

Jul 30, 1990 James A. Peterson U.S. Geological Survey Department of Geology University of Montana Missoula, Mont. The northern Rocky Mountain-Great Plains area includes nine main petroleum exploration provinces. These are the Wyoming-Utah-Idaho Thrust Belt, southwestern Wyoming basins, the Big Horn basin, the Wind River basin, the Powder River basin, western Montana, Sweetgrass arch, Central Montana, and the Williston basin-Sioux uplift province (Fig. 1).

GAIN EXPECTED IN 1990 U.S. WELL COMPLETIONS

Jul 30, 1990 G. Alan Petzet Exploration Editor U.S. well completions in 1990 will reach their highest level since 1987 unless balky crude prices or some unseen factor undermine second half spending.

JOINT EXPLORATION RESEARCH HELPING CUT COSTS

Aug 13, 1990 G. Alan Petzet Exploration Editor Oil and gas operators and service companies are participating in several cooperative exploration research projects. Advantages to joint research include accomplishing more goals with constrained budgets, reducing duplication of effort, and cutting finding costs. Conoco Inc. is serving as contractor for an Enhanced Exploration Research Project that started up in the field in July at its borehole test facility near Ponca City, Okla.

WORLD PIPELINE CONSTRUCTION WORK PACE SET BY U.S. GAS LINE PROJECTS

Sep 3, 1990 World pipeline construction continues a recovery led by gas transmission projects in the U.S. U.S. pipeline companies plan to lay 3,226 miles of gas line this year, compared with 1,978 miles planned for 1989, according to Oil & Gas Journal's latest pipeline construction survey (OGJ, Feb. 5, p. 17). The survey covers only countries outside the former Communist bloc. Gas line projects planned in the U.S. for 1990 and beyond total 13,005 miles, an increase of more than 3,700 miles from the

METHODS CALCULATE AREA DRAINED BY HORIZONTAL WELLS

Sep 17, 1990 S.D. Joshi Joshi Technologies International Inc. Tulsa The drainage area of a horizontal well can be calculated by averaging the results obtained from two different methods. For anisotropic reservoirs, nonuniform permeability has to be included in drainage area calculations. Horizontal wells, in general, give higher reserves than vertical wells. Two reasons for obtaining higher ultimate reserves are increase in the drainage area and increase in the recovery factor.

HORIZONTAL WELLS-1 HIGH EXPECTATIONS FOR HORIZONTAL DRILLING BECOMING REALITY

Sep 24, 1990 William J. Lang, Marion B. Jett Baker Hughes Inc. Houston Spawned by technological developments of the late 1980s, horizontal drilling has become a separate growth industry with its own set of economic and technical variables. The current and potential future activity levels for this rapidly expanding technology are analyzed in this first of a series of eight articles. In coming issues, the series will discuss the latest tools, and procedures for drilling and completing horizontal wells.

SILO AREA, WYOMING: DIFFERENTIAL COMPACTION FRACTURING CAN SIGNIFICANTLY AFFECT PRODUCTION

Oct 15, 1990 Gilbert Thomas Thomas & Associates Denver With the advent of horizontal drilling, fractured shale and chalk reservoirs have become important targets in the search for oil and gas deposits. Equally important in the search has been the corollary question of just where in the fractured reservoir do the most fractures occur? While reservoir fracturing is generally thought to be either the result of mechanical stress (tectonic) or hydrostatic stress, another cause of fracturing not generally

MORE HORIZONTAL DRILLING UNDER WAY IN U.S.

Oct 29, 1990 G. Alan Petzet Exploration Editor Operators continue to chalk up successes--as well as some mixed results--with horizontal drilling in a variety of U.S. regions. The South claims a large share of such activity (OGJ, Oct. 22, p. 36). Here are samples of what's happening in Michigan, the Rockies, and Oklahoma: PetroStar Energy, Traverse City, Mich., tried Michigan's first deep basin horizontal hole at 1-16 Riverside in Missaukee County earlier this year.

HORIZONTAL WELLS-5 FORMATION EVALUATION HELPS COPE WITH LATERAL HETEROGENEITIES

Nov 19, 1990 Michael Taylor Exlog Houston Nick Eaton Eastman Christensen Houston While drilling, maintaining the optimum position of the well bore with respect to productive intervals is paramount to the success of the horizontal well. Even the best understood reservoirs are at the mercy of lateral geological heterogeneities that influence production success. To date, horizontal drilling has targeted fractured reservoirs, thin oil plays, and reservoirs with known coning problems. Some fields are being
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