Western U.S.

1 Houston-based Rosetta Resources Inc. completed two southern Alberta Basin vertical Bakken wildcats on the Blackfeet Indian Reservation in Glacier County, Mont. The #3608-34-01 Simonson is in Section 34-36n-8w and produced 447 bbl. of oil, 298,000 cu. ft. of gas and 385 bbl. of water in 10 days during May. It was set up as a 6,600-ft. test to Souris River. In nearby Section 7-34n-6w, #3406-07-14 Turvey produced 100 bbl. of oil, 59,000 cu. ft. of gas and 410 bbl. of water during 10 days in May. It was drilled and cased to 5,400 ft. There is no commercial production from Bakken in Glacier County.

2 Bill Barrett Corp. has scheduled a 9,331-ft. horizontal Uteland Butte (lower Green River) test in the western Uinta Basin in Duchesne County, Utah. The #1H-27-46 LC-Tribal will be drilled to a bottomhole location in the same section. True vertical total depth is anticipated at 5,987 ft. and is on Barrett’s Blacktail Ridge-Lake Canyon prospect on the southwestern flank of the Altamont Field area. Barrett is planning up to five additional horizontal wells targeting Uteland Butte in the second half of 2011. The company anticipates drilling approximately 50 wells on the Blacktail Ridge-Lake Canyon prospect. In 2010, Denver-based Barrett initiated a continuous development program in the Blacktail Ridge-Lake Canyon area, where, according to the company, rates of return on oil development are nearing 50%.

3 Petro-Hunt LLC of Dallas completed an offset to the company’s Bloomfield South Field discovery that initially flowed 424 bbl. of oil, 161,000 cu. ft. of gas and 7 bbl. of water per day. The #17D-20-1H Boje Farms 19-54 is in Section 17-19n-54e of Dawson County, Mont. Production comes from an acidized, openhole horizontal lateral in the Red River C laminated porosity zone at 11,290-14,661 ft. The true vertical total depth is 11,022 ft. According to IHS Inc., the well’s vertical pilot hole was drilled to 11,200 ft. Log tops in the pilot hole include Interlake at 10,372 ft.; Gunton at 10,751 ft.; Stony Mountain at 10,805 ft. and Red River at 10,838 ft.

4 A horizontal exploratory test by Zenergy Inc. initially flowed 605 bbl. of oil, 319,000 cu. ft. of gas and 920 bbl. of load water per day from Middle Bakken. Tulsa-based Zenergy’s #18-19H Rella is in Section 18-153n-103w of Williams County, N.D., and produces from a horizontal lateral that extends from 11,033 ft. southward to 20,559 ft. at a bottomhole location in Section 19-153n-103w. Following 25-stage fracture stimulation, the well was tested on a 40/64-in. choke and measured a flowing tubing pressure of 200 psi and a flowing casing pressure of 1,000 psi. The producer’s true vertical depth is 10,775 ft.

5 Continental Resources Inc. has completed another producer in the Brooklyn-Bakken pool in Williams County, N.D. Located In Section 19-155n-98w, the well initially flowed 688 bbl. of 40.6-degree-gravity oil, 943,000 cu. ft. of gas and 400 bbl. of water per day. Continental’s #1-19H Mildred produces from a horizontal Middle Bakken lateral extending from 11,347 ft. northward to a measured total depth of 21,023 ft. at a bottomhole location in Section 18-155n-98w. Gauged on a 16/64-in. choke, the tubing pressure was 2,700 psi. The venture was tested following 30-stage fracturing between 11,397 ft. and 21,010 ft. The true vertical depth is 11,069 ft. Continental’s headquarters are in Enid, Okla.

6 Anadarko Petroleum subsidiary Kerr-McGee Oil & Gas Onshore L.P., completed five horizontal Niobrara producers in the Wattenberg Field area of the Denver-Julesburg Basin in Weld County, Colo. The #2-2HZ Pinnacle, Section 2-1n-68w, initially flowed 221 bbl. of 49-degree-gravity oil, 414,000 cu. ft. of gas and 656 bbl. of water per day from a fractured interval at 7,913-11,929 ft. The #3-19HZ Dechant, Section 19-2n-64w, initially flowed 257 bbl. of 45-degree-gravity oil, 166,000 cu. ft. of gas and 785 bbl. of water per day from a fractured interval at 7,607-11,366 ft. The #4-19HZ Dechant, Section 19-2n-64w, initially flowed 219 bbl. of 45-degreegravity oil, 224,000 cu. ft. of gas and 802 bbl. of water per day from a fractured interval at 7,456-11,291 ft. The #4-5HZ Guttersen, Section 5-3n-63w, initially flowed 340 bbl. of 46-degreegravity oil, 361,000 cu. ft. of gas and 1,231 bbl. of water per day from a fractured interval at 7,207-11,120 ft. The #27-1HZ Dolph, Section 1-2n-66w, initially flowed 176 bbl. of 51-degreegravity oil/condensate, 563,000 cu. ft. of gas and 791 bbl. of water per day from a fractured interval at 7,657-11,687 ft. Anadarko’s headquarters are in Houston.

7 A Weld County, Colo., horizontal wildcat by Slawson Exploration Co. initially flowed 55 bbl. of oil and 100 bbl. of water per day. The #16-11-66 Outlaw is in Section 16-11n-66w. Production comes from a horizontal lateral in Niobrara extending from 8,865 ft. to 13,394 ft. at a bottomhole location in the same section. The Slawson venture was tested following 13 stages of fracture stimulation between 8,902 and 12,391 ft. and the true vertical depth is 8,545 ft. Slawson’s headquarters are in Wichita, Kan.

8 Lone Star Land & Energy II of Richardson, Texas, completed a horizontal Niobrara wildcat in the Denver-Julesburg Basin that initially produced 70 bbl. of 34-degree-gravity oil, 10,000 cu. ft. of gas and 20 bbl. of water per day. Located in Section 16-14n-64w in Laramie County, Wyo., #14-64-16-1H State produces from a horizontal lateral in Niobrara extending from 8,242 ft. north-northwestward to 12,352 ft. The venture was tested following 19 stages of fracture stimulation between 8,297 and 12,341 ft. True vertical depth is 7,987 ft.

9 A horizontal exploratory test by Lone Star Land & Energy II initially flowed 1,605 bbl. of 34-degree-gravity oil, 359,000 cu. ft. of gas and 519 bbl. of water daily. The #12-62-16-1H Loyd-State is in Section 16-12n-62w of Laramie County, Wyo., and produces from a horizontal lateral extending from 7,390 ft. north-northwestward to 11,509 ft. Following 18 stages of fracture simulation between 7,611 and 11,365 ft., the well was tested on a 48/64-in. choke and the flowing casing pressure was 450 psi. The true vertical depth of the Denver-Julesburg Basin well is 7,276 ft. Site log tops include Niobrara at 7,150 ft., Niobrara A at 7,270 ft. and Niobrara B at 7,310 ft.

10 On its Hereford Ranch prospect in Weld County, Colo., EOG Resources Inc. completed a horizontal Niobrara producer that initially flowed 248 bbl. of 36-degree-gravity oil, 177,000 cu. ft. of gas and 237 bbl. of water per day. The #13-17H Critter Creek is in Section 17-11n-63w and produces from a horizontal Niobrara lateral extending from 7,665 ft. northwestward to a 12,780 ft., 7,434 ft. true vertical. It was tested after fracturing Niobrara at 7,692-12,731 ft. Flow was gauged through a 16/64-in. choke with a casing pressure of 690 psi. EOG’s headquarters are in Houston.

11 According to IHS Inc., a Pennsylvanian Marmaton producer by Wiepking-Fullerton Energy in Colorado’s Great Plains Field initially produced 162 bbl. of 37-degreegravity oil and 81,000 cu. ft. of gas per day. The #2 Bubba-State is in Section 20-10s-55w of Lincoln County. The well was tested in an acidized Marmaton interval at 6,928-42 ft. Before completing the well in Marmaton, the deeper Pennsylvanian Cherokee was perforated at 7,152-60 ft., acidized, tested unsuccessfully and then closed off by a bridge plug set at 7,100 ft. The well was drilled to 7,870 ft. by the Englewood, Colo.-based company.

All data in the Exploration Highlights section is based on sources believed to be reliable, but its accuracy cannot be guaranteed. The prudent investor intending to act upon any particular data is urged to verify it with all other available sources. In no way should the publication of these items be construed as an express or implied endorsement of a company or its activities.

Most land in the U.S. is divided into townships—rectangular tracts six miles square. The township, in turn, is divided into 36 numbered sections, each a one-mile square. The lines running north-south and dividing east from west are called range lines. The lines running east-west and dividing north from south are township lines.

A well in Section 15-Township 4 north-Range 3 east is abbreviated: 15-4n-3e.