超高压气井气液两相分离器效率模拟与优化  

Simulation and Optimization on the Performance of Gas-liquid Two-phase Separator in Ultra-high Pressure Gas Wells

作　　者：王欢欢[1] 王博[1] 张杰桢 徐柱天 曾曦越 WANG Huan-huan;WANG Bo;ZHANG Jie-zhen;XV Zhu-tian;ZENG Xi-yue(Southwest Oil and Gas Field Branch Northwest River Gas Field,Jiangyou Sichuan 621700,China;School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China)

机构地区：[1]西南油气田分公司川西北气矿,四川江油621700 [2]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《当代化工》2022年第12期2985-2988,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金面上项目,稠密水合物浆体气液固三相混输流动机制及其对管道冲蚀规律研究(项目编号:51974269);中国石油西南油气田分公司2021年科研计划项目,气田高效分离优化配置研究(项目编号:20210305-14)。

摘　　要：针对因超深、超高压气井投产初期产出液温度波动较大,使得产出液黏度、表面张力等性质发生变化,研究温度对超高压气井气液两相分离器分离性能的影响,以提高分离器分离性能。以关井压力为104 MPa的SY001-X8超高压气井卧式重力分离器为研究对象,考虑气液两相夹带作用,基于双流体模型建立了气液两相分离过程数学模型,研究了进料温度对超高压气井气液两相分离器的工作特性影响。结果表明:随进料温度升高,出口液相体积分数呈现先减少后增加的趋势,在40℃时出口液相体积分数最小;相应地,分离器的分离效率呈现先增加后减少的趋势,在30℃取得最大效率62.79%。通过优化分离器出口捕雾器结构,分离效率可提高至89.65%。In view of the large fluctuation of the temperature of the produced liquid in the initial production of ultra-deep and ultra-high pressure gas wells, which can change the viscosity, surface tension and other properties of the produced liquid, the influence of temperature on the separation performance of the gas-liquid two-phase separator in ultra-high pressure gas wells was studied to improve the separation performance of the separator. Taking the SY001-X8 ultra-high pressure gas well horizontal gravity separator with a closing pressure of 104 MPa as the research object, considering the entrainent of gas and liquid two-phase, a mathematical model of the gas-liquid two-phase separation process was established based on the two-fluid model, and the influence of feed temperature on the working characteristics of the gas-liquid two-phase separator of ultra-high pressure gas well was studied. With the increase of feed temperature, the methane density and inlet flow rate gradually decreased, and the outlet liquid volume fraction first decreased and then increased, and the outlet liquid volume fraction was the smallest at 40 ℃;Accordingly, the separation efficiency of the separator showed a trend of increasing first and then decreasing, and the maximum efficiency was 62.79% at 30 ℃. After optimizing the mist catcher, the separation efficiency of the separator was increased to 89.65%.

关 键 词：超高压 气井 气液两相分离器 分离效率 数值模拟 

分 类 号：TE934[石油与天然气工程—石油机械设备]