Since late April 2010, Brigham Exploration Company has expanded its acreage position in the Williston Basin by approximately 52,800 net acres to an estimated 358,200 net acres, which represents a 17% increase in its total Williston Basin acreage. Importantly, Brigham has expanded its core acreage position by an estimated 34,000 net acres, primarily in and around its Rough Rider project area, to a total of approximately 198,400 net acres. Brigham also announced the completion of the Rogney 17-8 #1H, its first Bakken well in its Eastern Montana project area in Roosevelt County, Montana, at an early 24-hour peak flow back rate of 909 barrels of oil equivalent. Finally, Brigham announced the completion of the Michael Owan 26-35 #1H and the Sedlacek Trust 33-4 #1 at early 24-hour peak flow back rates of 2,931 and 2,695 barrels of oil equivalent, respectively.

Growth in Williston Basin Acreage In addition to its ongoing organic leasing efforts, Brigham completed four separate acreage acquisition transactions, expanding its Williston Basin acreage position by approximately 52,800 net acres since late April to an estimated 358,200 net acres. Approximately 23,800 net acres were added to its Rough Rider project area in Williams and McKenzie County, North Dakota. In addition, approximately 9,900 net acres were added in far eastern Richland County, Montana, very proximate to Brigham's Sedlacek Trust well, which had an early 24-hour peak rate of 2,695 barrels of oil equivalent. As a result, Brigham's core acreage position west of the Nesson Anticline in Rough Rider and in far Eastern Montana has grown by approximately 27% to an estimated 156,700 net acres. An additional 300 net acres were added east of the Nesson Anticline in the Ross project area in Mountrail County, North Dakota. Together, this represents an increase of 34,000 net acres in its core acreage in the Williston Basin to approximately 198,400 total net core acres. As a result of these acreage additions, Brigham has increased its core acreage drilling locations by an estimated 81 net locations to approximately 574 total net locations.

Separate from the aforementioned core acreage additions in far eastern Richland County, Montana, Brigham added approximately 17,300 additional acres in its Eastern Montana project area further west from the Sedlacek Trust well in Richland County. The remaining 1,500 net acres acquired in Eastern Montana are located in Roosevelt County.

Initial Brigham Operated and Non-Operated Montana Bakken Discoveries Brigham announced the completion of its operated Rogney 17-8 #1H in its Eastern Montana project area in Roosevelt County at an early 24-hour peak rate of approximately 909 barrels of oil equivalent. Given that this was Brigham's initial test in the area, the initial nine frac stages, or approximately 30% of the horizontal wellbore, were stimulated at lower frac pump rates. However, as a consequence the well produced at low initial flow rates. Brigham subsequently treated the remaining 21 frac intervals at higher frac pump rates and, when commingled with the initial nine intervals, the well produced 909 barrels of oil equivalent in an early 24 hour period. Currently the Rogney is flowing at a rate of approximately 400 barrels of oil equivalent per day.

Also in Montana and approximately 17 miles southeast of the Rogney, Brigham participated with a small working interest in the Zenergy Luke Sweetman, which was completed with 23 frac stages. The Luke Sweetman commenced production in late April at an early 24-hour peak rate of approximately 1,201 barrels of oil equivalent per day, after 100 days had produced roughly 30,000 barrels of oil and was recently producing approximately 320 barrels of oil equivalent per day. Brigham will continue to monitor the performance of the Rogney and other surrounding wells, and plans on spudding its next Montana operated well, the Gobbs 17-8, approximately five miles east of the Rogney in November.

Update on Accelerating North Dakota Bakken and Three Forks Operational Activity Brigham announced the completion of its operated Michael Owan and Sedlacek Trust wells at early 24 hour peak flow back rates of 2,931 (2,640 Bopd and 1.75 MMcf/d) and 2,695 (2,413 Bopd and 1.69 MMcf/d) barrels of oil equivalent, respectively. Both wells are located in Brigham's Rough Rider project area. Notably, the Sedlacek Trust represents the southwestern most well to date of Brigham's acreage in its Rough Rider project area. The Michael Owan and Sedlacek Trust were treated with 33 and 30 frac stages, respectively. Brigham maintains an approximate 87% interest in the Michael Owan and an approximate 48% working interest in the Sedlacek Trust. The Sedlacek Trust was completed with U.S. Energy Corp. (NASDAQ: USEG) as well #10 under the terms of the 15 well Drilling Participation Agreement entered into last year. Brigham's interest in the wells drilled with U.S. Energy Corp. will increase after payout.

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