SK 309 & SK 311 is a producing conventional gas field located in shallow water in Malaysia and is operated by PTTEP Sarawak Oil. The field is located in block SK 309, with water depth of 164 feet.

An expansion project is associated with the SK 309 & SK 311, namely Pemanis Development. This project is currently in the construction stage.

Field participation details

The field is owned by PT Pertamina (Persero), PTT Public and Petroliam Nasional.

Production from SK 309 & SK 311

The SK 309 & SK 311 conventional gas field recovered 81.48% of its total recoverable reserves, with peak production in 2015. The peak production was approximately 41.85 thousand bpd of crude oil and condensate and 321 Mmcfd of liquid natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2031. The field currently accounts for approximately 3% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 70.67 Mmboe, comprised of 20.62 Mmbbl of crude oil & condensate and 300.29 bcf of liquid natural gas reserves. SK 309 & SK 311 conventional gas field reserves accounts 0.02% of total remaining reserves of producing conventional gas fields globally.

Contractors involved in the SK 309 & SK 311 conventional gas field

Some of the key contractors involved in the SK 309 & SK 311 project as follows.

Main EPC: KKB Engineering

Other Contractors: Sapura Energy

About PTTEP Sarawak Oil

PTTEP Sarawak Oil Ltd (PTTEP) is a petroleum exploration and production company. PTTEP is headquartered in Thailand.


Information on the field is sourced from GlobalData’s fields database that provides detailed information on all producing, announced and planned oil and gas fields globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.