Pengshui block is a typical shale gas reservoir at atmospheric pressure which has lower coefficient of original formation pressure

and usually needs artificial lift recovery after fracturing. In the initial stage

we optimized the electric submersible pump for the drainage gas recovery. This technology was simple

meanwhile

the formation energy declined gradually

the formation liquid supply gradually decreased and the recovered fluid contained impurities such as sand and clay particle

so that it was hard to realize the stable continuous drainage and recovery

and had complex operation precess and high production cost. In order to solve these problems

we researched and applied the jet pump

and optimized the technology parameters and matching technology. At last

we formed a set of jet pump technology suitable for the drainage gas recovery of shale gas at atmospheric pressure to effectively guide the pressure of shale gas recovery.