Exxon Co. U.S.A. has completed the fourth and fifth producing wells in significant Chalkley Oligocene Miogypsinoides gas/condensate field of Cameron Parish, La.
The field appears to be one of the largest gas discoveries in South Louisiana in several years.
Meanwhile, Transco Exploration Partners Ltd. (TXP), Houston, which has varying interests in the field's five Miogyp gas wells, has taken a farmout from Exxon to drill a deep test.
The farmout covers depths below currently producing intervals in the field. TXP plans to spud its 1 Sweet Lake at a site about 2,500 ft southeast of the Exxon 1 Sweet Lake discovery well for Chalkley Miogyp field. Projected depth is 18,500 ft.
TXP will own a 100% working interest in the well. Exxon will retain an overriding royalty interest convertible to a working interest upon payout.
TXP said the new well will provide more information needed "to assure a proper evaluation of TXP's interest in the field."
Transco Exploration Co., managing general partner and majority owner of TXP, disclosed its intention early in 1989 to offer TXP's oil and gas assets for sale, liquidate the partnership, and distribute the net proceeds to TXP unitholders.
Transco Energy Co. Pres. George S. Slocum said early this month that he was unable to predict when the sale of this interest or the liquidation of TXP will be completed. He said he hopes TXP's unitholders will receive final liquidating distributions later this year. Latest completions Exxon's 5 Sweet Lake Land & Oil Co. 10-12s-7w, flowed 40.5 MMcfd of gas, 678 b/d of 32.5' gravity condensate, and 32 b/d of water through a 32/64 in. choke with 7,100 psi flowing tubing pressure from an undisclosed interval. Total depth is 15,620 ft in a sidetracked hole.
Interpretation of logs, sidewall cores, and other data from Exxon's 4 Sweet Lake, 14-12s-7w, indicate about 185 ft of net gas sand below 14,000 ft, Transco said,
The 4 Sweet Lake, 3,700 ft south of the field discovery, has been tested through perforations at 14,316-664 ft, but results have not been reported. The well is expected on production within weeks.
West Chalkley field has been producing at the rate of about 80 MMcfd of gas.
Exxon opened the field in mid-1989 at 1 Sweet Lake, 11-12s-7w, on a farmout from TXP. It flowed gas and water from six intervals in Miogyp sand at 14,670-886 ft, Petroleum Information reported.
The discovery well, 15 miles southeast of Lake Charles, cut about 500 ft of gas bearing sands.
Exxon completed the first and second offsets to the discovery well last summer.
The 2 Sweet Lake, 11-12s-7w, flowed 25.4 MMcfd of natural gas, 321 b/d of condensate, and 27 b/d of water from perforations at 14,789-885 ft.
The 3 Sweet Lake, 13-12s-7w, flowed 26.1 MMcfd of gas, 472 b/d of condensate, and 39 b/d of water from 14,373-576 ft.
The 2 and 3 Sweet Lake had an estimated 300 ft and 246 ft, respectively, of net gas sands, all in Miogyp.
TXP holds an 8.75% working interest in the No. 4 well and about 30.625% in the No. 2 and 3 wells. It holds a 5% overriding royalty interest, which will convert to a 35% working interest upon payout, in the discovery well.
Quintana Petroleum Corp., Houston, is active at a projected 18,500 ft test southeast of the field, and W.B. McCarter Jr. Inc., also of Houston, is drilling a 12,500 ft Oligocene Marginulina howei test east of the field.
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