Research and Application of Intelligent Pressurized and Gas Lift Integration Process

In the middle and late stages of shale gas well production, due to the decrease of formation energy and the deterioration of liquid-carrying capacity, water flooding and stopping of spraying still occur frequently after the platform pressurization equipment has been put into operation, and it is necessary to use the truck-mounted compressor to maintain the normal production of the well for a long period of time, which leads to the problems of large workload of gas lifting and high process operation cost. In order to solve the above problems, the research and application of intelligent pressurized and gas lift integration process was carried out to realize the dual functions of gas lift drainage and pressurized external transmission by using the platform's original pressurized equipment. On the basis of in-depth analysis of the production dynamics of gas wells on the shale gas platform and the working conditions of the booster compressor, the technology is modified by carrying out the supporting process, connecting the gas lift pipeline to each gas well on the platform at the outlet end of the booster equipment, and introducing the method of intelligent distribution control of the gas injection volume to realize the auxiliary production of liquids by gas lifting, and at the same time, boosting to reduce the pressure at the wellhead, so as to effectively bring into full play the production capacity of the gas wells. Using this process on seven platforms including L203H5, the company successfully got rid of truck-mounted compressor gas lift, increased gas production by 85.17 million cubic meters in total, saved 17.77 million yuan in truck-mounted compressor gas lift costs, and created an economic benefit of 116.5 million yuan. The successful application of this process has broadened the process technology of gas extraction from shale gas wells in low-pressure and low-productivity periods, and provided support for the process to reduce costs and increase efficiency.