Texas-Oklahoma: Granite Wash, Marmaton boost Unit

By OGJ editors
HOUSTON, May 3
– Unit Corp., Tulsa, plans to run three to four rigs drilling Granite Wash horizontal wells in 2011 that should result in 20-22 operated wells in the Texas Panhandle this year and two rigs in the Marmaton horizontal oil play in Beaver County, Okla.

Unit looks for Granite Wash reserves from the five Granite Wash wells that had first sales in the quarter ended Mar. 31 of 4 bcfe/well, 10% oil, 37% natural gas liquids, and 53% natural gas. One well is completed in the Granite Wash A zone, two in the B, one in the D, and one in the F.

The first D zone completion resulted in a peak rate of 483 b/d of oil, 474 b/d of NGL, and 4.4 MMcfd of gas and a 30-day average of 7 MMcfe/d.

Unit had first sales in the quarter from nine Marmaton horizontal wells in which it averaged 91% working interest. Average EUR is 130,000 boe, 76% oil, 14% NGL, and 10% gas. Well cost averaged $2.8 million.

Unit has scheduled three to four Marmaton frac dates/month for 2011. It foresees having first oil sales on 30-36 gross wells in the play, where it owns 66,000 net acres.



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