SOCO tests high Oligocene oil rate offshore Vietnam

SOCO International PLC said it gauged oil at one of the best rates from the Oligocene in Vietnam at the TGT-10XST1 exploratory well on the H5 fault block of Te Giac Trang field, exceeding all pretest expectations.

Combined maximum rate from two of the three zones tested exceeds 16,500 b/d of oil. A third drillstem test in the well, which encountered some 250 m of gross pay section (119 m of net pay) in Miocene and Oligocene reservoirs, is under way.

The first test, over a net 93-m section in the Oligocene C, produced at a maximum 9,488 b/d of 41.1° gravity oil and 1.16 MMscfd of gas. The second test, over the Miocene Lower 5.2L sequence, tested a net 47.3-m interval. The maximum flow achieved over this interval was 7,100 b/d and 1.76 MMscfd.

The final test is of the Lower Miocene Intra Lower Bach Ho 5.2 Upper and Lower sequence, testing an additional net 88.6 m. This test has just commenced and should be completed in 5-7 days.

The TGT-10XST1 well is 6 km south of the H4 wellhead platform, which is in the southern part of TGT field on Block 16-1 in the Cuu Long basin off southern Vietnam.

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