The Design And Experimental Study Of High-resolution Conductivity Water-Cut Sensor

With the oilfields of mining, oilfield will enter the high water-cut stage, even extra high water-cut stages. Daqing Oilfield has entered the high water-cut stage. At this stage, the scientific management of oil and gas reservoirs and enhanced oil recovery has great significance. The existing conductance water-cut sensor has the advantages of non-blocking, non-radioactive, simple structure, low cost, response speed, etc, and has been widely used in the Daqing and Jilin oilfield. However, with the extensive application, Oilfield will enter the high water-cut even in high water-cut stage. During this period the requirements of the production logging tool will be more demandingThe instrument in the case of extra high water cut lack of Accuracy. If we can develop the high-accuracy conductivity water-cut sensor under, based on the conductivity water-cut sensor now we have, it will be more conductive conductivity water-cut sensor in the oilfield development in the latter part of the promotion.In the view of the later stage of oilfield production, he special circumstances of high water-cut, even extra high water-cut. In this paper, high-resolution Distributary Conductance Water-Cut sensor was proposed based on the original of Conductance water-cut sensor, and in the case of changing the split ratio, I have simulated to the Flow Field of Oil-water two phase flow in the Distributary Conductance Water-Cut Sensor by the finite element simulation software, FLUENT, and have got the flow field distribution, as well as different flow rate, different water-cut of the annulus space water rate. Simulation results and data analysis results show that the shunt will much better when he split ratio is about 30%. Article based on the model of high-resolution Distributary Conductivity Water-Cut Sensor and boundary conditions Electric field was simulated by ANSYS software, the stimulation results show that Electric field diverge from the excitation electrode along the axial direction to the metal instrument case, the conduction current evenly distributed between Excitation electrode and the case of the instrument, and the current evenly distribution, So the measured value of mixed-phase can be very good show the change of water-cut of sensor.Principle experiment prototype is designed and has been used for dynamic experiments Experimental results show that the measurement accuracy has been greatly improved. This method provides a new way of thinking for measuring the water-cut under the high water-cut.