Indonesia: AWE Completes Lengo-2 Gas Well Appraisal Program

AWE Completes Lengo-2 Gas Well Appraisal Program

AWE Limited has completed the drilling and testing program at the Lengo-2 gas appraisal well, offshore East Java, Indonesia, and the well has been successfully plugged and abandoned as planned and the rig released.

The Lengo-2 well was drilled to a total depth of 837.6 metres (2,748 feet). As previously advised, two separate Drill Stem Tests (DST) were completed with gas samples sent for laboratory analysis.

The first DST tested the upper part of the Kujung I formation from 736m to 757m (2,415 ft to 2,485 ft) and flowed gas at a rate of 4.5 million standard cubic feet per day (scf/d). The second DST was conducted over the Kujung I formation interval from 736m to 784m (2,415ft to 2,571ft) and achieved a maximum gas flow rate of 21.2 million scf/d with the flow rate limited by surface equipment. A wireline logging program was completed over this interval. Three cores were cut and retrieved from the Kujung I carbonate reservoir in Lengo-2 from 739m to 784m (2,425ft to 2,571ft) recovering an estimated 42m (137ft) of core.

Preliminary analysis results for DST 1, announced previously, indicate a gas composition of Methane 66%, Carbon Dioxide 10%, Nitrogen 21%, and other hydrocarbon gases 3%. These results are similar to the gas composition encountered from tests at Lengo-1. The final results of the compositional analysis for both DSTs are expected in coming weeks.

AWE’s Managing Director, Mr Bruce Clement, said, “The drilling and testing of the Lengo-2 well was a success with high gas flow rates achieved and gas composition in line with earlier testing.

“AWE and its partners will now assess these results with a view to a future commercial development. There is a growing market for natural gas in East Java which provides a potentially attractive destination for this gas resource, should it prove commercial.”

“The flow rates from the two DSTs at Lengo-2, combined with a gas flow of 12.8 million scf/d achieved in the Lengo-1 well in 2008 gives the Joint Venture a strong base from which to evaluate the future commercial development potential of the Lengo field,” Mr Clement said.

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LNG World News Staff, May 27, 2013; Image: AWE