渗透率对砂岩储层的敏感性及水相圈闭影响规律研究  

Study on the Sensitivity of Permeability to Sandstone Reservoir and the Law of Water Locking Damage

作　　者：余菲羽 杨逸超 喻嘉昊 吴仪 卢灵珊 汪杰[1,2,3] YU Fei-yu;YANG Yi-chao;YU Jia-hao;WU Yi;LU Ling-shan;WANG Jie(Cooperative Innovation Center of Unconventional Oil and Gas,Yangtze University,Wuhan 430100,Hubei,China;Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas,Yangtze University,Wuhan 430100,Hubei,China;College of Petroleum Engineering,Yangtze University,Wuhan 430100,Hubei,China)

机构地区：[1]长江大学非常规油气省部共建协同创新中心,湖北武汉430100 [2]油气钻采工程湖北省重点实验室,湖北武汉430100 [3]长江大学石油工程学院,湖北武汉430100

出　　处：《阀门》2024年第6期766-771,共6页VALVE MAGAZINE

基　　金：国家级大学生创新创业项目“甲烷水合物生成规律与动力学抑制剂评价研究”(编号202310489018)资助。

摘　　要：随着常规油气资源的枯竭,越来越多的勘探开发技术聚焦于非常规油气藏。为了探究钻完井及生产过程中,应力、流体流速及外来流体等主要因素随渗透率变化时对储层造成的伤害程度,本文基于典型的常规砂岩和致密砂岩储层岩心,研究了渗透率变化时的砂岩应力敏感性、流速敏感性和水敏性,以及流体入侵引起的水锁损害情况。研究结果表明:高渗透率岩心(Kg>10mD)主要表现为中等偏弱速敏、水敏和应力敏感性,中渗透率岩心(Kg>1.0mD,<10mD)属于中等速敏、水敏与强应力敏感,低渗透率岩心(Kg<1.0mD)属于强速敏、水敏与应力敏感。随着渗透率的降低,岩心中滞留的水相含量逐渐增加,对应形成的水锁损害程度加剧,因此在致密砂岩储层中,应尽可能地减少外来流体或边底水入侵,降低对储层的水锁伤害。本研究为认识常规与致密砂岩储层中渗透率对其敏感性的影响及水锁损害提供参考意义。With the depletion of conventional oil and gas resources,more and more exploration and de-velopment technologies focus on unconventional reservoirs.In order to explore the degree of damage to the reservoir caused by major factors such as stress,fluid velocity and foreign fluid when permeability changes during drlling,completion and production,this paper studies the stress sensitivity,flow velocity sensitivity and water sensitivity of sandstone under permeability changes,as well as the water lock dam-age caused by fluid invasion based on typical conventional and tight sandstone reservoir cores.The re-sults show that the core with high permeability(permeability>10 mD)is mainly characterized by moderate and weak velocity sensitivity,water sensitivity and stress sensitivity;the core with medium permeability(permeability>1.0 mD,<10 mD)belongs to moderate isovelocity sensitivity,water sensitivity and strong stress sensitivity;the core with low permeability(permeability<1.0 mD)be-longs to strong velocity sensitivity,water sensitivity and stress sensitivity.With the decrease of permea-bility,the content of water phase in the core gradually increases,and the corresponding degree of water lock damage is aggravated.Therefore,in tight sandstone reservoirs,it is necessary to reduce the inva-sion of foreign fluid or edge and bottom water as much as possible,so as to reduce the water lock dam-age to the reservoir.This study provides reference for understanding the influence of permeability on sensitivity and water lock damage in conventional and tight sandstone reservoirs.

关 键 词：渗透率 砂岩油气藏 敏感性 气相渗透率 水锁损害 

分 类 号：TE38[石油与天然气工程—油气田开发工程]