(Source: CNPC News)
China‘s First Horizontal Well Increase Production Over 10 Times than Conventional Wells in Demonstration Area, Changqing Oilfield.

On November 16, 2014, Jizhong Luo, Plant Manager of No.10 Changqing Oil Production Factory, who undertook the development and management of Changqing oilfield, said: "this gratifying achievement not only depends on its well type advantage of horizontal well, but also depends on the PE measures taken in the corresponding horizontal well."

As the first horizontal well development demonstration area of CNPC established in its tight oil and gas reservoirs, the development of horizontal Wells was not going well in Changqing oilfield was not going well. At the end of 2012. As Changqing oilfield has just been put into scale development and the supporting measures couldn't keep up with scale development of horizontal well, daily output of single well is not ideal and output of individual horizontal well that just drilled no more than 1 year decreased by 50%. In particular, some wells are flooded and preduce no oil at all. Some people even doubt that if this place is suitable for horizontal well drilling or not.

Through a lot of research analysis, technical staff found that output of individual well is low because of tight formation, and no outflow channels. Watered is serious, because disordered relation of injection-production caused large differential pressure in different direction and inject water flowed to the well of good porosity. The correct understanding is a guide to action. No.10 Changqing Oil Production Factory based on detailed analysis of each reservoir geological characteristics, adhere to the concept of "Drill every well well with good every meter penetration, transform every horizon well". For the new development area, by deploying the measures of oil & water well adjusting solutions and transformation of the mode of reservoir reconstruction for the spring of efficient development of horizontal well.