致密砂岩产水气井气举排液模型研究  

Gas-lift Drainage Model of Tight Sandstone Water-producing Gas Well

作　　者：李进步 田冷[3,4] 刘志军 黄诗慧 刘雪玲 张梦园 LI Jin-bu;TIAN Leng;LIU Zhi-jun;HUANG Shi-hui;LIU Xue-ling;ZHANG Meng-yuan(PetroChina Changqing Oilfield Company Exploration and Development Research Institute,Xi'an 710000,China;National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields,Xi'an 710000,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Engineering Research Center of Gas Resource Development and Utilization of Education,China University of Petroleum-Beijing,Beijing 102249,China;CNOOC Shenzhen Branch,Shenzhen 518000,China)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,西安710000 [2]低渗透油气田勘探开发国家工程试验室,西安710000 [3]中国石油大学(北京)石油工程学院,北京102249 [4]中国石油大学(北京)气体能源开发与利用教育部工程研究中心,北京102249 [5]中海石油(中国)有限公司深圳分公司,深圳518000

出　　处：《科学技术与工程》2023年第12期5041-5047,共7页Science Technology and Engineering

基　　金：国家科技重大专项-油气重大专项(2016ZX05047-005-001)。

摘　　要：苏里格气田是典型的致密砂岩气藏,其有效储层含水饱和度高,气、水层混杂分布,开发中后期一般因井筒积液阻碍天然气有效开发,往往需要排液才能保持一定的产量,目前气举是排液较为有效的方法,然而如何提高排液效率及优化气井排液制度已成为制约气举排液效果的难题。以高产水生产气井为研究对象,根据油套管质量、动量和能量方程,建立了气举井筒排液模型,运用显示欧拉差分方法对其进行求解。基于所建立的气井井筒排液模型,研究了不同注气量、井口油压等参数对气井排液效率的影响程度,并分析了S井气举排液过程中产液量、产气量以及排液时间等工作指标变化特征。研究成果为致密砂岩产水气井提高排液效率,以及气举排液生产制度优化提供了一定的指导。The Sulige gas field is one of the typical tight sandstone gas reservoirs in China,the reservoir features high water saturation in the effective reservoir and mixed distribution of gas and water layers.During the middle and late stages of development,the effective development of natural gas is usually hindered by fluid accumulation in the wellbore,and fluid drainage is often required to maintain sustain production.A gas lift wellbore drainage model was developed based on the oil casing's mass,momentum,and energy equations,and it was solved using Eulerian difference method.Based on the established gas wellbore drainage model,the degree of influence of different parameters,e.g.,gas injection volume and wellhead oil pressure on the drainage efficiency of gas wells were studied,and variables such as fluid production,gas production and drainage time during gas lift drainage of S wells were analyzed.The research results provide guidance for improving drainage efficiency of water-producing gas wells in tight sandstone and optimizing gas lift drainage production.

关 键 词：致密砂岩 气井产水 气举排液 排液效率 

分 类 号：TE355.3[石油与天然气工程—油气田开发工程]