PetroChina â Sichuan achieved an important exploration progress in the Sichuan Basin. Shuangtan 8, an exploration well, located in Shuangyushi prospect in Jiange area, tested gas in the Permian, the successful result further indicated gas exploration prospective potential in the northwest of the basin. The well was spudded in the second half of 2016.  In 2014 PetroChina made Shuangtan 1 discovery in this area, the well tested 30 MMscfg/d from the Permian Qixia Formation and 44.7 MMcf/d of gas from Maokou formations. The well has a TD of 7,308 m.  In 2016 PetroChina made a breakthrough in in Shuangtan 3 in this area, the well not only tested gas form the Permian Qixia Formation, but first time achievedÂ  commercial gas flow from the Devonian Guanwushan Formation, from which tested 4 MMcf/d of gas.  In September 2016, PetrroChina successfully completed an ultra-deep and ultra-pressure Shuangyu 001-1, to assess Shuangtan 1 discovery. The well reached a TD of 7,510 m.  In October 2016 PetroChina spudded a record deep well around Shuangtan discovery area.Â  Shuangtan 7, an exploration well, has a PTD of 7,775 m. The well has objective in the Permian and Devonian formations. The well is still under drilling by end 2017.  Â 
China (Sichuan B.) Shuangtan (Si) 3 op. by PETCHIN SC (100.0%) in Beichuan-Jiange block