Niobrara

Niobrara Shale Description ImageThe Niobrara shale formation is situated in northeastern Colorado and parts of adjacent Wyoming, Nebraska, and Kansas. Primarily an oil play, it is in the Denver-Julesburg Basin, which has long been a major oil and gas province. An emerging play, the Niobrara is in its early stages and companies have been busy leasing land for future drilling. It has been compared by some to the Bakken shale formation farther to the north.

Samson Oil & Gas is one of the earliest companies to establish a position in the Niobrara, which some call the “NeoBakken.” Other operators include EOG Resources, Anadarko Petroleum, SM Energy, Noble Energy, Chesapeake Energy, Whiting Petroleum, Quicksilver Resources, MDU Resources, and Bill Barrett Corp. Chesapeake and EOG each have about 400,000 net acres in the Niobrara.

Niobrara Shale Map

Niobrara Shale News

INTERNATIONAL SEISMIC CREW COUNT

Jan 3, 1994 Russia's North East Petroleum Operating Agency (NEPO) has called for comments from international oil companies about proposed lease sale terms for tenders ending next spring of Primagadan area off Magadan oblast in Okhotsk Sea and East Khatyrka area off Chukotka in the Bering Sea (OGJ, May 10. p. 21). The comments also are to influence later offerings of 14 other offshore areas in the Russian Far East. Halliburton Energy Services, Houston, is coordinating responses and forwarding remarks to

HORIZONTAL GAS-STORAGE WELLS CAN INCREASE DELIVERABILITY

Oct 11, 1993 Fred J. Pittard, Jim A. Madigan SlimDril International Inc. Houston Horizontal drilling with special attention to the requirements of gas-storage zones can yield wells with deliverability about six times that of comparable vertical wells. Although horizontal-drilling technology used on development wells can be successfully applied to gas storage, there are several major differences that must be considered during both planning and drilling.

TIGHT GAS DRILLING BRINGS COLORADO'S WATTENBERG FIELD ITS BUSIEST YEAR

Jun 21, 1993 Drilling in northeastern Colorado's Wattenberg field shows no sign of slowing down even though the federal tax credit applicable to tight sand gas wells was not extended, says a report by Petrie Parkman & Co., Denver. Wattenberg's main operators plan to drill more than 1,000 wells in the field this year, making it one of the busiest in the U.S. Most present drilling targets gas in Cretaceous Codell and Niobrara low permeability sands at 6,700-8,200 ft, but the field has seven potential

HERE ARE POINTS TO REMEMBER WHEN EXPLORING NIOBRARA IN THE ROCKIES

Aug 17, 1992 Richard A. Harnett Consulting geologist Tulsa The Niobrara formation in the central Rocky Mountain region has been written about at length by several authors, most recently concerning Silo field near Cheyenne, Wyo. The Niobrara has proven an enigma to many explorationists, because while the promise is great (individual wells with cumulative production in excess of 1 million bbl), many times the results have been disappointing. What follow are a few observations and concepts that may help start

HORIZONAL DRILLING RETAINS STEADY SHARE OF U.S. ACTIVITY

Aug 10, 1992 A. D. Koen Gulf Coast News Editor After peaking in late 1990 and early 1991, U.S. horizontal drilling activity began a steady slide that carried through first half 1992. But despite higher drilling and completion costs and significant technological challenges, U.S. horizontal action has held its share of activity in a declining domestic oil and gas industry.

NIOBRARA GAS INDICATIONS COVER WIDE AREA OF WESTERN NEBRASKA

May 11, 1992 Raymond R. Burchett Nebraska Geological Survey Lincoln The Niobrara formation was named in north-eastern Nebraska by Meek and Hayden1 for exposures along the Missouri River bluffs near the town of Niobrara in Knox County (Fig. 1). Distribution of the Niobrara is restricted to the western four fifths of Nebraska. Much of the formation is concealed by deposits of older Cretaceous, Tertiary, and the younger Quaternary age rocks. Exposures of the Niobrara occur in the south-central, east-central,

EFFECTS OF DIFFERENTIAL COMPACTION FRACTURING SHOWN IN FOUR RESERVOIRS

Feb 3, 1992 Gilbert E. Thomas Thomas & Associates Denver With the advent of horizontal drilling in the U.S., fractured reservoirs have become a major target in the ongoing search for hydrocarbons. Early optimism resulting from the high initial production rates for horizontal wells, however, is now being replaced by a more realistic view as many such wells are exhibiting rapid declines in production. This is especially true for the Mississippian Bakken shale play in the Williston basin and the Cretaceous

LOCATING NIOBRARA FRACTURES-2 (CONCLUSION) ANALYZING RESISTIVITY, OIL PRODUCTION OF NIOBRARA IN WYOMING'S SILO FIELD

Sep 9, 1991 Reed A.Johnson, R. Timothy Bartshe Energy Foundation Inc. Lakewood, Colo. The Silo field area in 15n-16n/64w-65w, Laramie County, Wyo., serves as an excellent study area for Niobrara oil production in that it contains 47 vertical wells that have produced nearly exclusively from Niobrara (Fig. 7).

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.

U.S. BRIEFS

Jun 24, 1991 SOUTHWESTERN ENERGY CO., Fayetteville, Ark., will hike 1991 capital spending to $48.1 million from an original budget of $32.2 million. The revised amount in-cludes $37.9 million for exploration and production, $9.5 million for utility system expenses, and $700,000 for other expenses. EXXON CO. U.S.A. let a contract to Jacobs Engineering Group Inc., Pasadena, Calif., for construction and engineering services for a 7,000 b/sd methyl tertiary butyl ether unit at its Baton Rouge, La., refinery.

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.

HORIZONTAL DRILLING YIELDS MORE GOOD WELLS

Apr 22, 1991 Columbia Gas Development Corp., Houston, has tested a significant, horizontally drilled oil discovery in Grand County, Utah. The 27-1 Kane Spring Federal flowed 914 b/d of crude oil and 290 Mcfd of natural gas through a 10/64 in. choke with 3,460 psi flowing tubing pressure from the Cane Creek zone of the Pennsylvanian Paradox. The wildcat was drilled to 8,244 ft measured depth, 7,248 ft true vertical depth.

HORIZONTAL DRILLING SPREADING OUT IN SEVERAL U.S. STATES

Apr 1, 1991 Horizontal drilling in relatively mature U.S. onshore reservoirs continues in several states. For example, American Exploration Co., Houston, 2-15 Midway Field Unit, in Lafayette County of South Arkansas flowed at rates of as much as 900 b/d of oil through a 20/64 in. choke with 450 psi flowing tubing pressure from Jurassic Smackover open hole at 7,149-80 ft. The well, given a light acid treatment, is expected to produce a sustained 450 b/d of oil. Site is 8 miles north of Lewisville.

HORIZONTAL DRILLING TECHNOLOGY KEEPS ADVANCING

Mar 11, 1991 Guntis Moritis Drilling/Production Editor The upward surge in horizontal drilling projects shows no signs of slackening and innovative applications of the technique continue. Dual horizontal laterals are the latest innovation that may accelerate the spread of horizontal drilling.

HORIZONTAL DRILLING TECHNOLOGY ADVANCES

Mar 4, 1991 Horizontal drilling technology is making further advances in the Texas Austin chalk play as such drilling continues to spread in many U.S. land areas. Union Pacific Resources Co., Fort Worth, has completed a Cretaceous Austin chalk oil well with the longest horizontal well bore in Texas and what at 1 1/6 miles is believed to be the world's longest medium radius horizontal displacement. UPRC's 1 Borchers Trust, 8 miles northeast of Gonzales in Gonzales County, flowed 1,162 b/d of oil and
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