1 In a non-producing region of the northwestern Montana Disturbed Belt 23, Anschutz Exploration Corp. has scheduled a 13,841-ft. horizontal wildcat. According to IHS Inc., the primary objective of #2-26H-36-13 Pine Ridge (in Section 26-36n-13w, Glacier County, Mont.) is the Cone calcareous member of the Marias River formation in Greenhorn shale. It will be horizontally drilled about one mile northward to a bottomhole location in Section 23-36n-13w. The horizontal venture is a twin to the Denver-based company's #1-26 Pine Ridge in the same section, a proposed 11,555-ft. vertical test of the Potlatch anhydrite member of the Devonian Three Forks. Drilled in 2010, Anschutz has disclosed no details. The two Anschutz drillsites are in a previously undrilled township approximately 26 miles north-northwest of East Glacier Field, an Upper Cretaceous Greenhorn oil reservoir, where Anschutz is attempting to develop oil reserves in the Cone zone via horizontal drilling.

2 Harvest Natural Resources Inc. completed a Uinta Basin exploratory test as a Green River/Wasatch oil producer. The Houston-based company's #1-9-3-1 Yergensen is in Section 9-3s-1w of Duchesne County, Utah. During the first two months of production the well produced 6,117 bbl. of oil, 4.6 million cu. ft. of gas and 17,246 bbl. of water from Green River and Wasatch zones. The venture was set up as an 11,650-ft. wildcat targeting Green River and Wasatch and was fractured in 13 stages. No additional completion details are available.

3 Bill Barrett Corp. of Denver completed three new gas producers in the Uinta Basin's Peters Point Field in Carbon County, Utah. The #10-25D-12-16 Peters Point Federal Unit flowed at an initial rate of 4.46 million cu. ft. of gas with 239 bbl. of water per day. The well was drilled to 7,845 ft. and the true vertical depth was 7,163 ft. Production is from nine fracture-stimulated stages—five in Wasatch between 5,521 ft. and 6,840 ft. and four in Mesaverde between 6,953 ft. and 7,692 ft. Gauged on a 48/64-in. choke, the casing pressure was 892 psi. From a common drillpad, Barrett completed two directionally drilled Wasatch/Mesaverde producers in Section 31-12s-17e. The #10-31D-12-17 Peters Point Federal Unit flowed 5.8 million cu. ft. of gas and 183 bbl. of water daily from 10 fractured stages—six in Wasatch between 5,813 ft. and 7,300 ft. and four in Mesaverde between 7,361 ft. and 7,876 ft. Flow was gauged through a 20/64-in. choke with a casing pressure of 1,122 psi. It was drilled to 8,076 ft., 7,050 ft. true vertical. The #14-31D-12-17 Peters Point Federal Unit flowed 4.81 million cu. ft. of gas and 128 bbl. of water per day from nine fractured stages—five in Wasatch between 5,596 ft. and 6,611 ft. and four in Mesaverde between 6,673 ft. and 7,169 ft. Flow was gauged through a 19/64-in. choke with a casing pressure of 1,111 psi. It was directionally drilled to 7,275 ft. and the true vertical depth was 6,920 ft. The completions are part of West Tavaputs prospect.

4 A horizontal exploratory test by Devon Energy Corp. in the Vermillion Basin initially flowed 1.96 million cu. ft. of gas, 339 bbl. of condensate and 240 bbl. of water daily. The Oklahoma City-based company's #1-4 Horseshoe Basin Unit is in Section 4-12n-102w of Sweetwater County, Wyo. Production comes from a horizontal Baxter shale (Upper Cretaceous) interval at 11,230-13,502 ft., after seven-stage fracture stimulation. The flowing tubing pressure was 2,100 psi. The horizontal lateral extends from 10,570 ft. west to 13,563 ft. at a bottomhole location in the northern part of the same section. The true vertical depth is 10,928 ft. The completion was originally drilled as an 11,700-ft. vertical hole in late 2008. The Oklahoma City-based company was granted approval to kick off the vertical hole and drill a horizontal sidetrack in Baxter in 2010.

5 EOG Resources Inc. of Houston reported that a horizontal Niobrara producer in Colorado's North Park Basin initially flowed 362 bbl. of 38-degreegravity oil, 294,000 cu. ft. of gas and 385 bbl. of water per day. The #4-06H Surprise is in Section 6-6n-80w of Jackson County and produces from a fractured horizontal Niobrara interval at 7,420-11,164 ft. Flow was gauged through a 16.5/64-in. choke with a casing pressure of 870 psi. According to IHS Inc., preliminary reports indicate the Niobrara lateral extends from 7,389 ft. southwestward to a bottomhole location in Section 7-6n-80w and that the true vertical depth is 6,850 ft.

6 According to IHS Inc., Noble Energy Inc. completed a horizontal Niobrara producer in Wattenberg Field that initially flowed 464 bbl. of 42-degree-gravity oil, 2.01 million cu. ft. of gas and 44 bbl. of water per day. The #19-99HZ Ziggy-USXAB is in Section 19-7n-64w of Weld County, Colo. The well produces from a fractured horizontal Niobrara interval at 7,752-10,900 ft. Gauged on a 48/64-in. choke, the tubing pressure was 334 psi and the casing pressure was 497 ft. The lateral was drilled southeastward to a bottomhole location in the southeast quarter of the same section. The proposed total depth was 11,892 ft. Noble's headquarters are in Houston.

7 In Bloomfield Field in Dawson County, Mont., Petro-Hunt LLC has completed a horizontal well that flowed 769 bbl. of oil, 292,000 cu. ft. of gas and 96 bbl. of water per day. The #19-53 2B-34-1H Austby is in Section 2-19n-53e and produces from an acidized horizontal Red River interval at 11,385-14,842 ft. Drilled to 11,250 ft., 10,929 ft. true vertical, the bottomhole location is to the northwest in Section 34-20n-53e. The flowing tubing pressure was 525 psi on an unreported choke size. Petro-Hunt is based in Dallas.

8 Brigham Exploration Co. completed a horizontal Middle Bakken well in Montana having a 24-hour peak flow rate of 1,544 bbl. of oil and 1.64 million cu. ft. of gas. Located in Section 17-28n-57e of Roosevelt County, #1-H Gobbs 17-8 was tested in a horizontal lateral after 36 stages of fracture stimulation. The well was drilled to 19,435-ft., 10,076 ft. true vertical, with a bottomhole location in Section 8-28n-57e. According to IHS Inc., the Austin-based company plans to complete four additional Montana Bakken wells in 2011. The #1-H Gobbs 17-8 is about one mile west of Brigham's #1-H Swindle discovery.

9 A horizontal wildcat by Tulsa-based Zenergy Inc. in McKenzie County, N.D., initially flowed 1,215 bbl. of oil, 650,000 cu. ft. of gas and 877 bbl. of load water daily. Zenergy's #10-15H Payette is in Section 10-151n-104w and produces from Middle Bakken extending from 10,500 ft. south-southeastward to 19,940 ft. (10,283 ft. true vertical). The bottomhole location is in Section 15-151n-104w. Gauged on a 32/64-in. choke, the casing pressure was 601 psi and was tested following 24-stage fracture stimulation.

10 ConocoPhillips Alaska Inc. and the Department of Energy's Office of Fossil Energy are planning to test innovative technologies for producing methane gas from gas hydrate deposits at an exploratory well on the North Slope during the winter 2011-2012 drilling season. The #1 Prudhoe Bay Unit Ignik Sikumi is in Section 34-12n-11e, Umiat Meridian, and was drilled in April to 2,597 ft. in Tertiary Sagavanirktok. It encountered 160 ft. of methane hydrate-bearing sandstone reservoirs in four separate zones. Downhole pressure and temperature sensors and a fiber-optic temperature sensor placed outside the casing will monitor the well as it returns to natural conditions following the drilling program. During the coming months, field trial participants will review data to determine the optimal parameters for field testing. During the winter, the two organizations will test a technology that involves injecting carbon dioxide into the sandstone reservoirs containing methane hydrates. According to the National Energy Technology Laboratory, laboratory studies indicate that the carbon dioxide molecules will replace the methane molecules within the solid hydrate lattice, resulting in the simultaneous sequestration of carbon dioxide in a solid hydrate structure and production of methane gas. Following those tests, the remaining time available before the spring thaw may be used to test reservoir response to pressure reduction in the wellbore (depressurization).

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.