期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 12, 页码 13686-13695出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3134067
关键词
Capacitance sensors; phase measurement; sensitivity analysis; sensor system; well logging
资金
- National Natural Science Foundation of China [61671401, 62173290]
- Natural Science Foundation of Hebei Province [F2019203526]
- Hebei Education Department [ZD2020118]
A trielectrode capacitance sensor (TECS) is designed for water cut measurement in horizontal oil-water flow, with static, dynamic experiments and field testing validating its effectiveness in different conditions.
From the actual development and testing re quirements of horizontal wells in domestic oilfields, according to the problems that the common sensors have relatively low resolution during the water cut measurement for the oil-water flow in the horizontal wells with medium and low production, a trielectrode capacitance sensor (TECS) is designed and a water cut measurement system based on TECS is developed for different conditions of horizontal oil-water flow. Specifically, the electrostatic field distribution of the annular measurement region is investigated under different conditions of horizontal stratified flow. Then, its equivalent capacitance on the electrodes is analyzed. Based on the simulated results, the effects of structural parameters on sensitivity distribution are analyzed, including the electrode length, the radius of the flow channel, and the thickness of the insulation, determining its optimal structure. Moreover, the static and dynamic experiments, as well as the field testing, validate the designed TECS, indicating that the TECS enables measuring the water cut of horizontal oil-water flow, especially under low flow rate and oil-water stratified conditions. The developed TECS could realize the water cut measurement with a wide flow rate range (3-60 m(3)/d) and the full water cut range (0%-100%) for the horizontal oil-water flow.
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