Changshen 40 flow tested at a stabilized rate of approximately 4 MMcfg/d from the Cretaceous Shahezi Formation tight gas clastic reservoir on 26 April 2020, after having undergone fracture stimulation in March 2020. The success of Changshen 40 has boosted the exploration potential of the tight gas reservoir in the Songliao Basin with PetroChina completing Changshen 40 as a production well and two further wells Changshen 39 and Changshen 41 to be drilled. Changshen 40 was spudded in Q2 2019 and was drilled to a TD of 5,428m MD in the Cretaceous Shahezi Formation on 16 September 2019. Data from wireline logging confirmed that Changshen 40 encountered 81m of strong gas shows in the Yingcheng volcanic reservoir and a further 75m of strong gas shows in the Shahezi Formation. Changshen 40 is in the PetroChina operated Chaganhua Block in the Songliao Basin. 
Changshen 40 flow tested at a stabilized rate of approximately 4 MMcfg/d from the Cretaceous Shahezi Formation tight gas clastic reservoir 