(As of April, 2013)

The South East Sumatra(referenced as 'SES' below) is one of oil development offshore of Indonesia. The SES is located in shallow water(20~50m) in the Java Sea off the southeastern coast of Sumatra. The SES covers approximately 8,098 sq km, and is consist of 34 fields and 360 production wells.

The SES was first awarded to IIAPCO in 1968 under PSC contract and has been produced since 1971. KNOC acquired a 8.91% interest in the SES in 2002, and the contact will be valid until 2018.

After the gas contract with Indonesia PLN in 2004, the SES Block began to produce the gas in ZELDA and BANUWATI field in 2006. And a gas project has been conducted to increase the gas reserve and productivity.

Despite the long production period, There are plenty of oil and gas reserves. Those are result from the work programs which comprise secondary recovery water flood schemes, infill drilling , well maintenance and workover programmes as well as marginal field additions.