胜利油田低渗透油藏压驱工程方案优化及矿场应用  

Engineering scheme optimization and field application of fracturingflooding for low‑permeability reservoirs in Shengli Oilfield

作　　者：郭建春[1,2] 卢聪 马莅 GUO Jianchun;LU Cong;MA Li(Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,China;National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]油气藏地质及开发工程全国重点实验室,四川成都610500

出　　处：《大庆石油地质与开发》2024年第4期204-214,共11页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“深层页岩压裂人工干预转向多裂缝动态扩展机制”(52374044);国家自然科学基金企业创新发展联合基金项目“湖相多岩相组合页岩油气储层成缝机制及有效开采机理研究”(U23B6004)。

摘　　要：为解决低渗透油藏压驱过程中存在的油井见效方向明显、压力下降快、含水上升快等开发难题,基于低渗透油藏压驱地质特征,抽提压驱开发工程问题,建立耦合渗流-应力-损伤(H-M-D)的低渗储层压驱数学模型,开展“压-闷-采”一体化压驱数值模拟,建立压驱工程参数优化图版。结果表明:以3 a累计经济净现值为目标,优化单层压驱注入量为3.0×10^(4)~3.5×10^(4)m^(3),压驱注入速度为1000~1200 m^(3)/d,闷井时间为20~30 d,驱油剂体积分数为0.15%~0.20%;优化后的低渗透油藏目标方案区BN1区块压驱缝网长度、宽度及高度较未优化的相邻BN0区块分别提高19.4%、27.3%、11.3%;与未优化的相邻BN2区块相比,BN1区块井口油压相当,日产液量降低42.4%,日产油量增加163.6%,含水率降低62.3%。研究成果能有效指导低渗透油藏压驱工程方案优化与现场实施。In order to solve development challenges of obvious producer response direction,rapid pressure drop and fast water cut increase in low-permeability reservoirs during fracturing-flooding process,based on geological characteristics of fracturing-flooding in low-permeability reservoirs,engineering problems of fracturing-flooding are extracted,coupled hydraulic-mechanical-damage(H-M-D)mathematical model for fracturing-flooding in low-permeability reservoirs is established,integrated fracturing-flooding numerical simulation of“fracturing-soaking-production”is carried out,and charts for fracturing-flooding engineering parameters optimization are plotted.The results show that,with the goal of 3-year cumulative economic net present value,injection volume of single-layer fracturing-flooding is optimized to 3.0×10^(4)~3.5×10^(4)m^(3),injection rate of fracturing-flooding is 1000~1200 m^(3)/d,well soaking time is 20~30 d and volume fraction of displacement agent is 0.15%~0.20%.Compared with adjacent BN0 block without optimization,the length,width and height of fracturing-flooding fractures network in optimized target scheme area BN1 block of low-permeability reservoir are increased by 19.4%,27.3%and 11.3%,respectively.Compared with adjacent BN2 block without optimization,wellhead tubing pressure in BN1 block is equivalent,with daily fluid production decreased by 42.4%,daily oil production increased by 163.6%and water cut decreased by 62.3%.The research can effectively guide the optimization of fracturing-flooding engineering schemes and field implementation for low-permeability reservoirs.

关 键 词：工程方案优化 压驱工艺 数值模拟 矿场应用 生产评价 低渗透油藏 

分 类 号：TE341[石油与天然气工程—油气田开发工程]