LONDON -- Drilling on the Te Giac Den 1X side track well on Prospect "E" in Cuu Long basin, offshore southeast Vietnam, has ceased after reaching 5,096 m (16,719 ft) MD, according to SOCO International. Concerns over well bore integrity, plus the difficulty and anticipated time and expense of deepening the hole, were blamed for not drilling an extended Basement section.
The well has been plugged back to 4,820 m (15,814 ft) MD prior to conducting two drillstem tests in the high pressure/high temperature Oligocene interval. The first DST will be over an approximate gross interval of 210 m (689 ft) in the higher pressured zone below the volcanics layer, which separates the two over-pressured sections. The second DST will be in the upper Oligocene interval above the volcanics layer over an approximate gross interval of 120 m (394 ft).
Testing is expected to be completed toward the end of June 2008.
In the same block, the Te Giac Trang 6X appraisal well, drilled on the H4 fault block as a down dip test to the TGT-3X exploration well, reached 3,437 m (11,276 ft) MD, as planned. Two DSTs were planned, the first to test4 m (10,151 ft) in the Miocene Intra Lower Bach Ho 5.2 "lower" interval and flowed approximately 6,650 b/d of oil through an 80/64-in. choke size.
A second DST will commence shortly over an approximate gross interval of 64 m (210 ft) in the ILBH 5.2 "upper" interval. Testing is expected to be completed by the middle of June 2008.