Tamsag-21 is a producing conventional oil field located onshore Mongolia and is operated by PetroChina Daqing Tamsaq. The field is located in block Block XXI.

Field participation details

The field is owned by China National Petroleum.

Production from Tamsag-21

The Tamsag-21 conventional oil field recovered 59.98% of its total recoverable reserves, with peak production in 2016. The peak production was approximately 12.05 thousand bpd of crude oil and condensate. Based on economic assumptions, production will continue until the field reaches its economic limit in 2039. The field currently accounts for approximately 46% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 17.8 Mmboe, comprised of 17.8 Mmbbl of crude oil & condensate.


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.