投捞电缆式电潜螺杆泵在页岩油中的应用

Application of Running/Pulling Cable Type ESPCP in Shale Oil Production

新疆油田吉木萨尔页岩油井区前期试验应用电潜螺杆泵生产,这种无杆泵举升工艺解决了有杆泵存在的断杆及偏磨等问题,对稠油出砂井具有良好的适应性,但却存在电缆与油管捆绑作业困难、起下管柱过程中电缆易损伤的问题。非金属敷缆管+电潜螺杆泵可以有效解决油管捆绑作业难及损坏问题,但在油液粘度过大时提下困难、打捞难度大。因此试验投捞电缆式电潜螺杆泵举升工艺,生产时将电缆从油管内下入井内并与井下电缆接头组件对接,需要起泵时再从油管内提出,实现电缆在油管内通过投捞的方式提下作业。介绍了投捞电缆式电潜螺杆泵举升系统,对现场应用效果进行了分析。新疆油田页岩油井区目前应用23口井,电缆投捞对接成功率100%,同时具有智能控制、节能降耗、安全环保的优点,值得扩大应用规模。

Electric submersible progressive cavity pumps(ESPCP)were used in the preliminary test of Jimsar shale oil well area in Xinjiang Oilfield.The rodless pump lift technology has solved the problems of rod breaking and eccentric wear existing with rod pumps,and is well applicable to heavy oil wells with sand production.With this technology,however,it is difficult to bind cable and tubing together,and cable is readily to be damaged in the process of tripping string.Nonmetallic cable conduit and ESPCP can effectively solve the problems of difficult binding operation and cable damage,but they are difficult to run in,pull out and fish when the oil viscosity is too high.Therefore,a running/pulling cable type ESPCP lift technology was tested.During production,cable is run into well through tubing,and then connected with downhole cable connector.When the pump needs to be lifted,cable is pulled out of tubing.In this way,the tripping in and out operations of cable is realized by running in and pulling out through tubing.This paper introduces the running/pulling cable type ESPCP lift system,and analyzes its field application effect.At present,this system is used in 23 wells in the shale oil well area of Xinjiang Oilfield,and the success rate of cable running,pulling and connecting is 100%.Due to its advantages of intelligent control,energy conservation,less consumption,safety and environment-friendliness,the application of this system is worth expanding.