Block A-18 is a producing conventional gas field located in shallow water in Malaysia – Thailand Joint Development Area and is operated by Carigali Hess Operating Co Sdn. According to GlobalData, who tracks more than 34,000 active and developing oil and gas fields worldwide, the field is located in block Block A-18, with water depth of 188 feet. Buy the profile here.

An expansion project is associated with the Block A-18, namely the Block A-18 Development. This project is currently in the feasibility stage, expected to start in 2029.

Field participation details

The field is owned by Hess and Petroliam Nasional.

Production from Block A-18

The Block A-18 conventional gas field recovered 53.01% of its total recoverable reserves, with peak production in 2022. The peak production was approximately 9.21 thousand bpd of crude oil and condensate and 979.00 Mmcfd of natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2052. The field currently accounts for approximately 78% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 740.88 Mmboe, comprised of 39.59 Mmbbl of crude oil & condensate and 4,207.72 bcf of natural gas reserves. Block A-18 conventional gas field reserves accounts 0.25% of total remaining reserves of producing conventional gas fields globally.

About Carigali Hess Operating Co Sdn

Carigali Hess Operating Co Sdn Bhd (Carigali Hess Operating) is an oil and natural gas company. Carigali Hess Operating is headquartered in Kuala Lumpur, Malaysia.

For more details on the Block A-18 Conventional Gas Field, buy the profile here.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Oil & Gas Intelligence Center, which provides detailed profiles of 34,000+ oil and gas fields, 400,000+ exploration blocks, 1,100+ LNG terminals, 3,400+ gas processing plants, 5,000+ storage terminals, and 8,000+ pipelines, 1,400+ refineries and 13,000+ petrochemical plants worldwide.