Sacgasco Ltd., a Sacramento Basin-focused natural gas developer and producer, said that the field appraisal drilling component of the company’s Dempsey 1-15 well in California has been successfully completed on Aug.21.
Dempsey 1-15 has reached the planned intermediate casing point and has been wireline logged. The wireline and mud logs have confirmed four zones of interpreted gas saturated sandstones at field production levels, depths from approximately 1,000 meters (m) to 1,560 m.
Based on log correlations and 3-D seismic, these gas filled sands have not been previously produced in this fault block of the field. The net gas pay estimate from the logs ranges from 30 feet (ft) to 50 ft depending on petro physical-parameter cut-off values used. These zones will now be protected behind casing for future testing and production.
As a reference point, the database on the Californian Regulator’s website shows that Sacgasco’s and other offset production wells have produced natural gas volumes that have exceeded 1 billion cubic feet of pipeline quality natural gas from individual equivalent zones.
As planned, nine five-eighth inch casing has been run to a depth of about 1,760 m and is in the process of being cemented in place in preparation for drilling ahead into more than five remaining prospective underlying sandstone reservoir targets.
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