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

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

U.S. HORIZONTAL DRILLING CONTINUES TO SPREAD

Dec 10, 1990 G. Alan Petzet Exploration Editor Horizontal drilling is still spreading in onshore U.S. oil fields. Texaco Inc. completed a shallow well producing oil by gravity drainage through three horizontal legs about 120 apart on the La Barge platform in Wyoming. Maersk Energy Co., Houston, apparently was successful with Austin chalk horizontal drilling in Sabine County, East Texas. Another horizontal completion in Cretaceous Niobrara was reported and several other wells were drilling or staked in Silo

HORIZONTAL DRILLING STILL FANNING OUT IN U.S.

Nov 26, 1990 G. Alan Petzet Exploration Editor Horizontal drilling is spreading rapidly in U.S. onshore basins. The Texas Railroad Commission has granted 929 horizontal well drilling permits through September 1990 since it issued the first to Exxon Co. U.S.A. for a horizontal well in Giddings field in Burleson County Aug. 1, 1984. In North Central Louisiana, OXY U.S.A. Inc., Houston, has placed on production a horizontal well producing oil from the Cruse sand member of Eocene Wilcox.

SNYDER TO ACCELERATE E&D

Nov 12, 1990 Snyder Oil Corp., Fort Worth, plans to step up its U.S. exploration and development campaign. It agreed to buy a one-half interest in more than 70,000 net undeveloped acres in Weld County, Colo., from Amoco Production Co. The purchase is to be made Simultaneously with the purchase of the other one-half interest in the acreage by privately held HS Resources Inc., San Francisco. The acreage, all held by production, lies in the area of Snyder's greatest concentration of operations. Snyder
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