Second well fails to produce pay for Ophir offshore Thailand

Offshore staff

LONDON Ophir has completed operations on the G4/50-11 wildcat exploration in the Southwestern Graben of the Gulf of Thailand.

Overall the well encountered an aggregate 5.5 m (18 ft) of net oil pay, but the discovery is considered to be below the economic threshold for a commercial discovery. However, the company remained positive about the operation, saying that this discovery confirmed the existence of an active hydrocarbon system in this previously undrilled Southwestern Graben.

The well also encountered a greater thickness of reservoir sands than expected pre-drilling, which is an encouraging result for the future exploration of this basin.

A comprehensive wireline logging process was completed, including the recovery of oil samples from both reservoir intervals.

The well was the second in Ophir’s 2015 exploration drilling program in the G4/50 license and targeted the Parichat Southwest prospect. The G4/50-11 well reached a total depth of 2,830 m (7,808 ft) and encountered oil in both the primary Oligocene and secondary Miocene reservoir targets. 

The G4/50-11 well will now be P&A’d and a detailed analysis of the well data will be conducted. This analysis will determine whether the multiple analogous prospects nearby have been sufficiently de-risked to warrant exploration drilling in 2016.

The rig will now move to the Bualuang Alpha platform to drill a water disposal well. This is part of the project to increase the water handling capacity at Bualuang, thus alleviating a potential production bottleneck.


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