KRISENERGY will review the results of the the Mustika 1 exploration well in the Sakti production sharing contract (PSC) in the East Java Sea, after initial findings indicate the discovery is not commercially viable.

Mustika 1 was drilled to a total measured depth of 2,768 feet and encountered gas in the Tuban and Kujung I formations, KrisEnergy said in December last year.

Initial indications from wireline logs are that the gases have a high carbon dioxide content and therefore are likely to be below the economic threshold for a commercial discovery, KrisEnergy said in an announcement.

The well will be plugged and abandoned and a detailed analysis of the well data and gas samples will be undertaken to review the remaining prospects and leads in the Sakti PSC.

KrisEnergy exploration and production director Chris Gibson-Robinson said Mustika 1 was the final exploration production well drilled in 2015.

“The first five were drilled in the Gulf of Thailand, all of which were successful.”

“The first four wells resulted in the recently approved plan of development for the Rossukon field,” Mr Gibson-Robinson added.

KrisEnergy was awarded the Sakti PSC in February 2014.

The block covers 497,400 hectares in the East Java Sea over the western margin of the East Java basin, Bawean Arch and the Muriah Trough.

KrisEnergy is also the operator of the Bulu PSC, which is adjacent to the Sakti PSC and contains the Lengo gas discovery for which the company received approval for its plan of development in December 2014.

Front-end engineering design for the Lengo development was completed in the third quarter of 2015, according to the company.

Gas sales negotiations are ongoing and preparations are underway to tender the contract for engineering, procurement, construction and installation.