Technical Improvement of Microwave Water Content Analyzer in the Application of Ji-7 Gas Bearing Heavy Oil
Accurately measuring the water content of a single well is an important means and main task for mastering the production performance of oil wells,and it is also an important basis for formulating water injection well distribution plans.The traditional measurement of water content in a single well mainly uses manual sampling testing methods,and the measurement data is point sampling,which can-not represent the true situation of water content in the oil well.With the promotion and application of microwave water content analyzers,real-time online accurate measurement of water content in single wells of thin oil(crude oil with viscosity less than 400 mPa·s at 50℃)has been achieved.The Ji-7 well area is a heavy oil reservoir,which is developed by injecting water at room temperature.The tem-perature of the produced liquid at the wellhead is only about 28℃,and the viscosity of the heavy oil is high.When the conventional microwave water content analyzer is applied to the Ji-7 heavy oil single well,the crude oil is easily attached to the water content analyzer probe,which seriously affects the measurement accuracy.In order to achieve the successful application of microwave water content analyzer in heavy oil blocks,it is necessary to develop a microwave water content online detector suitable for heavy oil.By improving the technology of microwave water content analyzer,measures such as reduc-ing the flow area,increasing the flow rate,developing anti-sticking coating for probes,and increasing the probe temperature have been taken to effectively solve the problem of oil adhesion in the water con-tent analyzer probe.The measurement error of heavy oil water content has been reduced from 20-30% to within 5% and the precise measurement problem of water content in heavy oil single wells with vis-cosity ranging from 400 to 2 500 mPa·s has been solved.Real-time online measurement of water con-tent in single wells of Ji-7 heavy oil has been achieved with 100% full coverage,laying a solid founda-tion for the implementation of unmanned digital well patrol mode in the Ji-7 well area.
heavy oilmicrowave water content analyzerwater contentdetection
万方数据
维普
