Ophir Makes Paus Biru Gas Discovery

Alpha and Beta platforms on Bualuang Field, Thailand (Photo: Ophir Energy)
Alpha and Beta platforms on Bualuang Field, Thailand (Photo: Ophir Energy)

U.K.-based Ophir Energy announced Friday its Paus Biru-1 exploration well in Sampang PSC offshore Indonesia has resulted in a gas discovery.

The well was drilled to a total measured depth (MD) of 710 meters and encountered 29 meters of estimated net pay within the target Mundu formation carbonate reservoir, the exploration and production company said.

A drill stem test (DST) taken over an interval between 576 and 605 meters (MD) flowed gas at a rate of 11.2 MMscfd sustained over a five-hour period through a 64/64” choke and at 525 psig well head pressure. The well was shut in for nine days for pressure buildup before a maximum flow test which produced 13.8 MMscfd through a 120/64” choke for 55 minutes.

The well has been plugged and abandoned as a gas discovery and plan of development will now be prepared for submission to the regulator for approval.

The Paus Biru discovery lies approximately 27 kilometers east of the producing Oyong Gas field, which is also in the Sampang PSC. Ophir said the approved budget for Paus Biru-1 well was $15 million.

Ophir, through its affiliate company, has 45 percent participating interest and is the operator of the Sampang PSC.

Ophir also announced that the first part of the Phase 4 of the Bualuang development drilling program has been completed in the Gulf of Thailand. Four workovers and three new production wells were drilled, all of which have been brought on stream. Production from Bualuang averaged 9,600 bopd in November against a year to date average of 8,000 bopd. 

A step out exploration well to test a small target to the north of the Bualuang field was drilled as part of the drilling campaign, but the main T2 reservoir target was not well developed in this location and the well has been abandoned as a dry hole, Ophir said.

The total cost of the drilling campaign was $25 million versus budget of $31 million.

Ophir has a 100 percent operated interest in the Bualuang oil field, which has been on-stream since 2008.

Alan Booth, Ophir Energy interim CEO, said, “This is a strong endorsement of the assets acquired from Santos earlier this year. Paus Biru is an example of the attractive near field exploration opportunities within the Sampang and Madura PSCs. Such discoveries can be highly valuable as they deliver both fresh production volumes and extend the economic life of the fields already in production.”

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