断层对复杂断块油藏水驱开发效果的影响  

Impact of fault on the development effect of water flooding in complicated fault block reservoir

作　　者：屈亚光[1,2] Qu Yaguang(School of Petroleum Engineering,Yangtze University,Wuhan City,Hubei Province,430100,China;Key Laboratory of Oil and Gas Drilling and Production of Hubei Province,Yangtze University,Wuhan City,Hubei Province,430100,China)

机构地区：[1]长江大学石油工程学院 [2]长江大学油气钻采工程湖北省重点实验室

出　　处：《油气地质与采收率》2017年第4期83-87,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项“高含水油田提高采收率新技术”(2011ZX05010-002)

摘　　要：复杂断块油藏中断层多且分布复杂，特别是对于断块内部发育较多低级别小断层的断块油藏，小断层会影响注采井网的水驱开发效果，需要对其影响规律展开研究，以指导注采井网部署和调整。根据复杂断块油藏中小断层的分布特点，设计3种注采井网，建立理想化的断层分布模型，分别采用油藏物理模拟和数值模拟方法研究各注采井网的水驱开发效果；采用物理模拟方法进一步研究小断层长度对注采单元水驱开发效果的影响。研究分析表明：当断块内部发育小断层时，在低注采压差条件下，注采井网3水驱开发效果最好，在高注采压差下，注采井网1水驱开发效果最好；断块内部小断层长度会影响注入水的波及体积，断层相对越长，断块内部注入水未波及到的油藏体积越大，水驱开发效果越差。There are lots of faults in complicated fault block reservoir.And their distributions are quite complicated.Especially in the fault block reservoir with many sub-order faults developed in the fault block,the sub-order faults will influence the water flooding development effect.And the influence rule should be studied to guide flooding pattern deployment and adjustment.According to the distributions and characteristics of the sub-order faults in the complicated fault block reservoir,three flooding patterns were designed and an idealized model of fault distribution was built.Water flooding development effect of different flooding patterns was studied by physical simulation and reservoir numerical simulation.The research results show that development effect of No.3flooding patterns was the best under the condition of low injection-production pressure drawdown,and No.2flooding pattern was the best under the condition of high injection-production pressure drawdown.The length of sub-order faults in the fault block will affect the swept volume of the injected water.The longer the fault length is,the larger the unswept reservoir volume of the injected water in the fault block is,and the lower the development efficiency is.

关 键 词：复杂断块油藏 断层 注采井网 物理模拟 数值模拟 开发效果 

分 类 号：TE347[石油与天然气工程—油气田开发工程]