PetroChina made a breakthrough in deep shale gas exploration drilling in the Sichuan Basin. Zu 201-H1, a horizontal well with a TD over 6,000 m, tested 3.7 MMcf/d of gas from the Longmaxi Formation in early November 2017, which is the deepest shale gas well so far completed in the Sichuan Basin with commercial gas flow.Â   PetroChina completed Zu 201-H1 well drilling in the Sichuan Basin in March 2017. Zu 201H-1, kicking off from Zu 201, reached a TD of 6,038 m. The well was started on 20 August 2016.Â   PetroChina completed Zu 201, a vertical shale gas exploration well, in the Sichuan Basin in October 2015. Zu 201 was located in Dazu-Rongchang block with target in the Longmaxi Formation and the well reached a TD of 4,412 m.  Earlier in 2017 PetroChina achieved commercial gas flow in a shale gas well in this area. Zu 202 tested 1.7 MMcf/d of gas from the Longmaxi Formation. The well has a TD of 3,980 m. PetroChina is partnership with Sinochem and Chongqing Municipal local energy company in the Dazu-Rongchang block. 
China, not found