In order to study the gas-liquid separation performance of gas-liquid cyclone separators and solve the problem of pump gas lock caused by potential high gas content in produced oil and gas fluid,a new type of spi-ral gas-liquid separator was designed based on the cyclone separation theory,and the internal flow field was studied under different gas-liquid ratios.The study results show that as the diversion ratio increases,the gas concentration near the inner wall and underflow outlet of the cyclone significantly decreases,the overflow pressure loss of the cy-clone gradually increases,while the underflow pressure loss gradually decreases,and the rate of increase in over-flow pressure loss is basically the same as the rate of decrease in underflow pressure loss.The increase in the diver-sion ratio gradually improves the degassing efficiency of the gas-liquid separator,and the gas volume fraction of un-derflow gradually decreases.Under working conditions of 1∶1,1∶2,1∶5 and 1∶8 gas-liquid ratios,the opti-mal overflow diversion ratios are 58%,39%,22% and 15% respectively.The study results provide a basis for the design of downhole gas-liquid separation devices for high gas content oil wells,and also provide guidance for field applications and operations.
关键词
井下气液分离器/气液比/数值模拟/分离效率/溢流分流比
Key words
gas-liquid separator/gas-liquid ratio/numerical simulation/separation efficiency/overflow di-version ratio
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