非均相驱油体系与低中渗油藏适应性评价研究  

Adaptability of heterogeneous flooding system to low-medium permeability reservoirs

作　　者：卢军[1] 张卓[2] 杨力生 郭琳琳 张小静[2] LU Jun;ZHANG Zhuo;YANG Lisheng;GUO Linlin;ZHANG Xiaojing(Oil and Gas Development Management Division,Sinopec Henan Oilfield,Nanyang,Henan 473132,China;Petroleum Exploration and Development Research Institute,Sinopec Henan Oilfield,Nanyang,Henan 473132,China;Henan Zhengjia Green Energy Co.,Ltd.,Zhengzhou,Henan 452370,China;No.2 Oil Production Plant,Sinopec Henan Oilfield,Nanyang,Henan 473400,China)

机构地区：[1]中国石化河南油田分公司油气开发管理部,河南南阳473132 [2]中国石化河南油田分公司勘探开发研究院,河南南阳473132 [3]河南正佳能源环保股份有限公司,河南郑州452370 [4]中国石化河南油田分公司采油二厂,河南南阳473400

出　　处：《油气藏评价与开发》2020年第6期17-23,32,共8页Petroleum Reservoir Evaluation and Development

基　　金：中国石化股份有限公司示范工程“中高渗砂砾岩油藏聚驱后非均相复合驱技术”(P19007-4);中国石化股份有限公司重大专项“聚驱后油藏水驱提高采收率技术”(P16080)。

摘　　要：王集油田王17块是国内首个在低中渗油藏开展的多级非均相调驱段塞聚合物驱提高采收率试验,目的是形成小断块、低中渗油藏化学驱配套技术,引领示范动用河南油田剩余的3512×10^4 tⅠ类、Ⅱ类化学驱储量,油藏技术关键是驱剂与油藏的适应性、有效封堵极端耗水层、井网调整技术。从聚合物、黏弹颗粒驱油剂(PPG)与油藏相适应入手,重点研究了黏弹颗粒驱油剂的粒径分布,分析了影响黏弹颗粒吸水溶胀的因素,表征了抗盐性、抗剪切性、热稳定性,同时对形成的非均相体系颗粒数与浓度关系、注入性、驱油效率及分流率进行评价,优选的非均相驱油体系与低中渗油藏适应性较好,矿场应用取得了增油降水效果,为低中渗油藏提高采收率提供了技术支撑,具有借鉴意义。Wang-17 Block of Wangji Oilfield is the first zone in China to carry out polymer flooding EOR test with multi-stage heterogeneous profile control slug in oil reservoirs with low-medium permeability.The objective is to form the matching technology of chemical flooding in small fault block and low-medium permeability reservoirs,and to lead,demonstrate and use the remaining ClassⅠand ClassⅡchemical flooding reserves of 3512×10^4 t in Henan Oilfield.The keys of the technology are adaptability of flooding agent to reservoir,effective plugging of extreme water-consuming layers and well pattern adjustment.Therefore,starting with the adaptability of polymer and preformed particle gel(PPG)to reservoir,the grain size distribution of PPG and the factors affecting water absorption and swelling of viscoelastic particulate have been studied and the salt resistance,shear resistance and thermal stability have been characterized.Meanwhile,the relation between particle number and concentration,the possibility of injection,the oil displacement efficiency and the diversion rate of heterogeneous system have been evaluated.The results show that the optimized heterogeneous flooding system has better adaptability to low-medium permeability reservoirs.Field application has achieved the effect of increasing oil production and reducing water,which provides technical support and significant reference to EOR in the similar oil reservoirs.

关 键 词：低中渗油藏 聚合物驱 黏弹颗粒 非均相驱 适应性 

分 类 号：TE357[石油与天然气工程—油气田开发工程]