Publications

A gas producer well with production rate of >50 MMCFD gas in Sumatra Onshore had failed a well integrity test. An abnormal annular pressure indicated tubing to annulus communication between the 5-1/2” tubing and 9-5/8” casing. As a result the well had been placed on a time-limited dispensation in which production could continue while a solution was sought to fix the leak. A Multi Finger Caliper survey was done with 5 abnormal connections at 1714.28 m, 1021.739 m, 944.94 m, 630.77 m and 52.038 m as the result, but conclusion on which connection has leak problem could not be confirmed. An Archer LeakPoint survey was undertaken from 2250 m to surface to identify the precise source and location of the leak. Dynamic logging clearly revealed a leak signature at tubing joint at 1021.98 m and 944.67 m. Based on the data gathered by the LeakPoint survey, two Owen casing patch was utilized to seal the leak. At the end of the combined 3 day operation, pressure testing confirmed no annular pressure anomalies and well integrity was fully restored. The rapid and precise nature of the LeakPoint survey allowed the client to confidently select and target casing patch as the most effective and efficient remediation. This significantly reduced non-productive remedial time and prevented the client from undertaking an unnecessary expensive recompletion.