Yanchang Petroleum achieved a breakthrough in shale gas exploration in the Ordos Basin. Yunye â Ping 3, tested 1.87 MMcf/d of gas, through a 10-stage with CO2 fracking,Â  in the Permian Shanxi Formation, which is an important success in non-marine shale gas exploration since Liuping 177 tested gas in non-marine Triassic in 2011 in the Basin.  Yanchang Petroleum has completed 5 wells in Yunye â Ping 3 area, with average tested gas rate about 70 Mcf/d. After Yunye â Ping 3 success, it is estimated about 1.8 Tcf of shale gas in place in this area.  Yanchang Petroleum started shale gas exploration in the Ordos Basin in 2008. In 2011, Liuping 177 tested gas in Triassic shale.Â  The well was completed on 22 July 2010 with a good show in the shale interval. On 24 April 2011, the company conducted a fracture work over a shale interval in the Chang 7 formation and tested with gas flowing.  In 2012, Yanchang Petroleum drilled Yanye Ping-1 and tested gas in Triassic shale.  In 2013, Yanchang Petroleum completed drilling operation in Yanye Ping-2 in the Ordos Basin. The shale gas horizontal well is located in Xiasiwan of Ganquan County in Shanxi Province. The well was spudded on 16 December 2012 and completed on 14 February 2013. This is the second horizontal well the company drilled for shale gas exploration.  For the last few years, less shale gas exploration progress has been reported from Yanchang Petroleum. The company originally planned to produce 500 million cubic meters shale gas by 2015 but this target is not met. However, In 2018 Yanchang Petroleum reports it has confirmed 5.8 Tcf of shale gas in place in the Ordos Basin and plans to build up 1.5 Bcm of shale gas production capacity by 2020.  Â 
Shale gas well in Ordos Basin, 10-stage CO2 frac yielded 1.87 MMcfg/d CO2 fracking in the Permian Shanxi fm. 