Study On Exploitation Technology Of Condensate Gas Reservoir In Qianmiqiao

After ten years of exploration and development,Qianmiqiao condensate gas reservoir in Dagang oilfield has some problems,such as the production time is short,the production is not stable,the gas production and well pressure reduce sustainedly,The formation of water is serious.These problem lead to low natural gas and oil recovery.So we take some measure,including Fill layer acidification,acidizing,The electric pump,Nitrogen gas drainage.The gas production was increased.But there still are some disadvantages,the cost is high,the validity is short,the gas increase is limited.In order to solve these problems,we choose four wells to do Pilot test of Tubing drainage,the accumulative oil increment is 2136t,the accumulative gas increment is 1208×104m3.With the oil recovery increasing,the reservoir pressure is reduced gradually.the validirty of Tubing drainage technology is short gradually.Therefore,The study on the determination of the accumulated liquid of Qianmiqiao is carried out.According to the technical characteristics of Qianmiqiao gas reservoir development,A variety of drainage methods were screened,finally,gas lift and Eddy current techndogy are selected.Taking Q4 Well as an example,analyze the sensitiveness of parameter and optimize the gas lift design with the PIPESIM and WELLCAT software.The validity of the process was extended,and gas increment is high.At the same time,Selected gas well to apply Eddy current techndogy,the reduction rate of gas well output is delayed,it also enhance the water displacement in gas well.