缓膨颗粒对塔河油田缝洞型油藏的调堵机理分析  

Analysis on Mechanism of Blocking and Profile Control of Slow-expanding Particles to Fracture-vuggy Reservoirs in Tahe Oilfield

作　　者：李亮[1,2] 张汝生[3] 伍亚军[1,2] 武俊文[3] 柳建新[4] LI Liang;ZHANG Rusheng;WU Yajun;WU Junwen;LIU Jianxin(Research Institute of Petroleum Engineering,Northwest Oilfield Branch,Sinopec,Urumqi,Xinjiang 830011,P R of China;Key Laboratory of Enhanced Oil Recovery for Fractured-vuggy Reservoirs,Sinopec,Urumqi,Xinjiang 830011,P R of China;Petroleum Exploration and Production Research Institute,Sinopec,Beijing 100083,P R of China;College of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100,P R of China)

机构地区：[1]中国石化西北油田分公司石油工程技术研究院,新疆乌鲁木齐830011 [2]中国石化缝洞型油藏提高采收率重点实验室,新疆乌鲁木齐830011 [3]中国石化石油勘探开发研究院,北京100083 [4]长江大学石油工程学院,湖北武汉430100

出　　处：《油田化学》2020年第2期245-249,共5页Oilfield Chemistry

基　　金：国家重大科技专项“缝洞型油藏堵调及靶向酸压工艺技术”(项目编号2016ZX05014-005)。

摘　　要：塔河油田缝洞型油藏具有高温高盐、出水规律复杂等特点,普遍采收率较低。针对这一问题,通过填砂管模型和二维可视化缝洞模型研究了超支化缓膨颗粒在塔河油田缝洞型油藏条件下的选择性堵水机理和流道调整机理。研究结果表明,该缓膨颗粒具有优良的抗温抗盐性能、油水选择性和液流转向性能。缓膨颗粒在模拟水中的最大膨胀倍数为14倍,堵水率66.7%,堵油率7.0%;可有效封堵高渗管,调剖后高渗管与低渗管的分流比从98∶2降至23∶77。微观可视化物模实验结果表明,水化膨胀的弹性颗粒在大尺寸裂缝中通过挤压变形和堆积压实作用形成卡封,从而调整流道促使深部液流转向,并通过逐级封堵和运移来实现后续水驱沿程扩大波及效率,有利于提高缝洞型油藏采收率。图11参14。The fracture-vuggy reservoirs in Tahe oilfield are characterized by high temperature,high salt and complicated water production rules,so it is difficult to achieve higher recovery.Aiming at these problems,using sand filling pipe model and two-dimensional visual fractured-vuggy model,the selective blocking and flow channel adjustment mechanisms of hyperbranched slow-expanding particles were studied under Tahe fractured-vuggy reservoir conditions.The experimental results showed that the slow-expanding particles had excellent temperature and salt resistance,oil-water selectivity and fluid steering performance.The maximum expansion ratio of slow-expanding particle was 14 times in simulated water,the water blocking rate was 66.7%and the oil blocking rate was 7.0%.The high permeability pipe could be effectively blocked,and the split ratio of high permeability pipe to low permeability pipe reduced from 98∶2 to 23∶77 after profile control.The result of microscopic visualization model experiment showed that the expanded elastic particles could form a seal in the large-size fractures by extrusion deformation and accumulation compaction.It could narrow the flow channel to promote deep fluid steering,and expand the sweeping efficiency of subsequent water flooding through stepwise blocking and migration,which would benefit to improve the recovery of fracture-vuggy reservoir.

关 键 词：缝洞型油藏 缓膨颗粒 油水选择性 调堵机理 塔河油田 

分 类 号：TE358.3[石油与天然气工程—油气田开发工程]