PetroChina â Sichuan completed an exploration drilling in the Sichuan Basin. Shuangtan 10, an exploration well, located in Shuangyushi prospect in Jiange area, reached a TD of 7,641 m at the Devonian Jinbaoshi Foprmation on 20 February 2018.  Shuangtan 10 was spudded on 22 June 2017 with a PTD of 7,525 m and had objectives in the Permian Qixia and Maokou formations, with second one in the Devonian.Â  
PetroChina â Sichuan completed an exploration drilling in the Sichuan Basin. Shuangtan 10, an exploration well, located in Shuangyushi prospect in Jiange area,