California: Ventura shallow heavy oil drilling planned

Sefton Resources Inc., Denver, said its TEG Oil and Gas USA Inc. unit will begin drilling four new wells in mid-November from existing pads in Tapia heavy oil field in the eastern Ventura basin in Los Angeles County, Calif.

Sefton Resources Inc., Denver, said its TEG Oil and Gas USA Inc. unit will begin drilling four new wells in mid-November from existing pads in Tapia heavy oil field in the eastern Ventura basin in Los Angeles County, Calif.

The field produces 18° gravity crude from Quaternary Yule sand at 1,100 ft. Sefton is seeking to increase production to 240 b/d in early 2012. Oil production in October from the company’s Tapia and Eureka fields averaged 129 b/d.

Original oil in place at Tapia is estimated at 11 million bbl. A consulting engineer is finalizing an interim report on continued steamflooding and cyclic steaming. Sefton believes full steaming could boost the recovery factor to 60-70% from 50%.

Sefton noted that Occidental Petroleum Corp.’s Vintage Production subsidiary has moved in a rig to drill a third well at Wayside Canyon oil field just east of Tapia field.

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