The Sarawak-East Natuna Basin is located off the northern coast of Borneo and straddles the maritime boundary of Malaysia and Indonesia. It is one of the most prolific in SE Asia, with total resources of over 13.7 bnboe discovered to date. Large gas finds in both the shelf and deepwater in recent years point to material remaining prospective resources. There is sufficient export and production infrastructure in the shallow waters of the basin to support production from future discoveries in the two shelf plays. However, gas-dominated deepwater discoveries will require significant investment and would receive limited relief from cost recovery. Explorers will therefore need to achieve low costs or realise higher gas prices to deliver value from this play. Historically, Shell has dominated exploration activity, with more recent newcomers including SapuraKencana and Murphy playing an increasingly greater role in the basin. Full details are available for download in pdf and xls format.