酸性含水气藏自适应控水完井模拟与优化  

Simulation and optimization of AICD completion in water-bearing sour gas reservoir

作　　者：赵旭 周朝 姚志良 李晓益 张睿 王旭 ZHAO Xu;ZHOU Chao;YAO Zhiliang;LI Xiaoyi;ZHANG Rui;WANG Xu(Research Institute of Petroleum Engineering Co.,Ltd.,SINOPEC,Beijing 102206,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 102206,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China;Quality,Safety and Environmental Protection Supervision Center,Huabei Oilfield Company,PetroChina,Renqiu 062450,China)

机构地区：[1]中石化石油工程技术研究院有限公司,北京102206 [2]页岩油气富集机理与有效开发国家重点实验室,北京102206 [3]中国石化石油勘探开发研究院,北京102206 [4]中国石油华北油田分公司质量安全环保监督中心,河北任丘062450

出　　处：《断块油气田》2023年第6期1040-1046,共7页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项课题“高压低渗油气藏固井完井技术”(2016ZX05021-005);“海相碳酸盐岩超深油气井关键工程技术”(2017ZX05005-005);中石化科技部攻关项目“酸性含水气藏控水完井关键工具研发及应用”(P20074-5)。

摘　　要：针对酸性含水气藏的自适应控水完井技术研究仍为空白,缺乏适用于酸性含水气藏的自适应控水完井模拟与优化设计方法。为此,综合考虑地层气体非达西渗流和应力敏感效应,建立了酸性含水气藏的沉积硫饱和度模型,引入时变表皮系数反映沉积硫饱和度对地层渗透率的影响;设计了满足酸性含水气藏控水和防硫堵双重要求的新型流道型流入控制件;建立了考虑硫沉积的酸性含水气藏自适应控水完井的地层-井筒动态模拟方法,通过设计正交实验和极差分析优化自适应控水完井关键参数。研究表明:与酸性含水气藏射孔完井相比,优化后的自适应控水完井造成的附加阻力损失很小,最大附加压降小于0.67 MPa,能够在控水的同时维持酸性气井正常生产;自适应控水完井技术可以降低日产水量和累计产水量,在10 a预测末期累计产水量降幅达22.7%。优化后的自适应控水完井技术可以实现酸性含水气藏的有效控水稳气。The research on AICD(autonomous inflow-control device)completion in water-bearing sour gas reservoir is still lacking,and there is no suitable simulation and optimization method for AICD completion in water-bearing sour gas reservoir.Therefore,a deposited sulfur saturation model is established considering both the non-darcy flow and the stress sensitivity,meanwhile,time-varying skin coefficient is introduced to reflect the influence of deposited sulfur saturation on the reservoir permeability.A new flow channel type inflow-control device is designed to meet the requirement of controlling water influx and sulfur plugging in water-bearing sour gas reservoir.A reservoir-wellbore dynamic simulation method for AICD completion in water-bearing sour gas reservoir is established,which considers the influence of sulfur deposition,then the key parameters of AICD completion are optimized by using orthogonal test and range analysis.The results show that the optimized AICD completion causes little additional pressure loss compared to perforation completion in water-bearing sour gas reservoir,and the maximum value of the additional pressure loss is less than 0.67 MPa,which means the optimized AICD completion can control water while maintain the normal production of sour gas wells.Meanwhile,the optimized AICD completion can decrease the daily water production and the cumulative water production,and the cumulative water production with AICD completion decreases by about 22.7%in the last stage of 10 year prediction period.The optimized AICD completion can effectively control water influx and maintain normal gas production in water-bearing sour gas reservoir.

关 键 词：酸性气藏 含水气藏 水平井 自适应流入控制 控水完井 数值模拟 优化 

分 类 号：TE257[石油与天然气工程—油气井工程]