Pressure issues cause well re-think offshore Vietnam

Offshore staff

LONDON – The Te Giac Trang field partners offshore southern Vietnam have found more reserves in a previously undrilled fault block.

According to SOCO International, the TGT-10X exploration well in the H5 fault block intersected 117 m (384 ft) of net pay. It was drilled into the Oligocene D2 section. However, higher than predicted formation pressure means mud weights need to be greater, so a liner will now be run over the Miocene and Oligocene reservoir horizons.

The partners are considering drilling the remainder of the well using a 6-in. bit to reach the targeted TD of 4,430 m (14,534 ft) MD, after completing current downhole logging operations. These will establish the reservoir parameters to assist design of the Miocene/Oligocene flow test program.

The well is being drilled 6 km (3.7 mi) south of the H4 wellhead platform in the southern part of the TGT field in Cuu Long basin block 16-1.


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