Ophir Drills Dry Well in the Gulf of Thailand

Ophir Energy plc announced Monday that it has completed operations on the G4/50-10 exploration well in the western Gulf of Thailand well that was testing the Soy Siam prospect. The well reached a total depth of 5,338 feet or 1,627 meters (True Vertical Depth Sub-Sea) and encountered the primary Miocene reservoir targets on prognosis in terms of both reservoir quality and depth. However, all reservoirs were dry and no hydrocarbon shows were encountered. The well has therefore been plugged and abandoned as a dry hole. Preliminary well failure analysis suggests that the structure had no access to charge, which was identified pre-drill as one of the key risks.

The rig will now move to drill the Parichat South West prospect. This well is independent of Soy Siam as it is testing a different petroleum system. The Parichat complex is a cluster of four fault blocks located 18.6 miles (30 kilometers) south of the Bualuang field that have potentially been charged from deeper in the South Western Sub-Basin. Each fault block has multiple stacked, Miocene and Oligocene reservoir targets. The South West fault block is the initial target with a mean prospective resource of 25 million barrels of oil (MMbo) and a 32 percent chance of success. If successful, the Parichat South East fault block would form an immediate follow on location.


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