Wax removal and control technology using intelligent ball pitcher and receiver for high-wax shale oil
Shale oil in Qingcheng oilfield has such characteristics as high wax content,high wax precipitation temperature,and high sand production rate.The aboveground gathering pipeline suffers frequently from wax and sand,resulting in serious pipeline diameter reduction,which causes the rise of back pressure in the oil wells,thus severely restricting the efficient production.In order to reduce the impact of oil well back pressure on shale oil production,the application of wax removal and control technology using intelligent ball pitcher and receiver was attempted.Aiming at the problems of high labour intensity of traditional manual ball pitching and receiving operation,high failure rate of automatic pitcher and receiver,poor wax cutting effect,inability to trace the running status of wax removal ball,and mismatch of new and old systems,6 technological improvements of automatic ball pitcher and 4 technological optimizations of automatic ball receiver have been carried out,wax removal ball structure and material has been improved,serial design of automatic ball pitcher and receiver and ball has been achieved,process optimization of 3 types of new and old systems have been conducted.Intelligent monitoring and control technology for the ball operation has been developed,thereby,the wax removal and control technology using intelligent ball pitcher and receiver for high-wax shale oil has been finalized.The field application shows that the natural receiving rate of all three oil pipelines has been increased to 100%compared with that ever,the average back pressure of oil wells has been decreased from 2.1 MPa to 0.7 MPa,the average pipeline purging cycle has been extended to 313 days from 45 days,the recognition rate of wax removal ball has been over 97%,and the operation status of wax removal ball has been intelligently monitored.Wax removal and control technology using intelligent ball pitcher and receiver for high-wax shale oil realizes the intelligent monitoring of wax removal and control using ball pitcher and receiver in shale oil pipeline,which meets the demand of unmanned shale oil platform and promotes the full scale development of shale oil in Qingcheng oilfield.
shale oiloil and gas extractionmechanical wax removalchemical wax removalhigh wax contentintelligenceball pitching and receiving
万方数据
维普
