射孔密度分布对水平井生产动态的影响  

Effect of perforation density distribution on production of perforated horizontal wellbore

作　　者：KAREEM Hasanain J HASINI Hasril ABDULWAHID Mohammed A KAREEM Hasanain J;HASINI Hasril;ABDULWAHID Mohammed A(Department of Mechanical Engineering,College of Engineering,University Tenaga Nasional,43000 Kajang,Malaysia;Institute for Sustainable Engineering,University Tenaga Nasional,43000 Kajang,Malaysia;Department of Thermal Mechanical Engineering,Southern Technical University,61001 Basra,Iraq)

机构地区：[1]马来西亚国家能源大学工程学院机械工程系,马来西亚加影43000 [2]马来西亚国家能源大学可持续工程研究院,马来西亚加影43000 [3]南方工业大学热能工程系,伊拉克巴士拉市61001

出　　处：《石油勘探与开发》2024年第2期409-417,共9页Petroleum Exploration and Development

基　　金：马来西亚教育部“基础研究资助项目(FRGS)”(20180110FRGS)提供的资金支持

摘　　要：针对水平井产量受水平井井筒射孔密度分布影响的问题,建立两种水平井射孔密度分布模式(即分别增大井筒入口段和出口段射孔密度)下的数值模型对水平井两相流动进行模拟;将模拟结果与实验结果进行对比,验证本研究数值模拟方法的可靠性,在此基础上采用数值模拟研究两种射孔密度分布模式下井筒各流型阶段总压降、气水两相流体表观速度、空隙率、液膜厚度和产气量、产液量的变化规律。研究表明,当水相流量保持不变时,随着空气流量的增加,总压降、气水两相流体表观速度增大,空隙率增加,液膜厚度减小;相较于增大出口段射孔密度,当入口段射孔密度增大时,产液量和产气量均增加,且产气量随着气体流量增加而增大;产液量在泡状流阶段增加,而达到弹状流—分层流过渡点后开始降低,进入分层波状流阶段后产液量开始增加;无因次产液量在增大井筒入口段射孔密度的模式下更大,且随着径向气相流量的增加而增大。To address the issue of horizontal well production affected by the distribution of perforation density in the wellbore,a numerical model for simulating two-phase flow in a horizontal well is established under two perforation density distribution conditions(i.e.increasing the perforation density at inlet and outlet sections respectively).The simulation results are compared with experimental results to verify the reliability of the numerical simulation method.The behaviors of the total pressure drop,superficial velocity of air-water two-phase flow,void fraction,liquid film thickness,air production and liquid production that occur with various flow patterns are investigated under two perforation density distribution conditions based on the numerical model.The total pressure drop,superficial velocity of the mixture and void fraction increase with the air flow rate when the water flow rate is constant.The liquid film thickness decreases when the air flow rate increases.The liquid and air productions increase when the perforation density increases at the inlet section compared with increasing the perforation density at the outlet section of the perforated horizontal wellbore.It is noted that the air production increases with the air flow rate.Liquid production increases with the bubble flow and begins to decrease at the transition point of the slug-stratified flow,then increases through the stratified wave flow.The normalized liquid flux is higher when the perforation density increases at the inlet section,and increases with the radial air flow rate.

关 键 词：水平井 两相流流型 射孔密度 井筒压降 空隙率 生产动态 

分 类 号：TE355[石油与天然气工程—油气田开发工程]