肯基亚克盐下油田应力场模拟及裂缝预测  

Stress simulation and fracture forecast of pre-salt oilfield in Kenkiyak

作　　者：薛永超[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京昌平102200

出　　处：《复杂油气藏》2012年第1期43-46,共4页Complex Hydrocarbon Reservoirs

基　　金：教育部高校博士点专项基金"裂缝性低渗透油藏非线性渗流模型"项目(20060425001)

摘　　要：低渗透油藏日益成为油气勘探开发重要领域之一,普遍发育的裂缝不仅对油藏流体渗流系统具有控制作用,而且影响着开发措施选择。裂缝的发育演化受应力场控制。应力场有限元数值模拟方法是定量研究应力场三维空间分布的有效手段。在综合分析肯基亚克盐下油田各种地质资料基础上,建立了油藏地质模型,对研究区应力场进行模拟计算,根据应力场模拟结果对裂缝发育特征进行了预测,结果表明断层夹持区、逆断层上盘、断层转折端、鼻状构造轴部等裂缝十分发育。结合肯基亚克构造演化史、三轴应力实验结果,归纳了研究区3种裂缝分布模式,即弱变形模式、中等变形模式、强变形模式,并分析了不同模式裂缝的分布范围。Low permeability reservoir is increasingly becoming one of important fields of petroleum exploration and development.Fractures not only control seepage system of reservoir fluid but also affect choice of development measures.Development and evolution of the fractures is controlled by stress field.Finite-element numerical simulation is an effective means for quantitatively studying three-dimensional space distribution of tectonic stress field.Based on the comprehensive analysis of various geological data of pre-salt oilfield in Kenkiyak,the reservoir geological model has been established to simulate the stress field in the study area,which can be used to forecast the cracks.The results show that cracks are highly developed in the fault clamping area,thrust faults upper plate,fault turning terminal,and the nasal shape structure axle area.Combined with structural evolution history in Kenkiyak and the triaxial stress experimental results,the cracks are classified into three distribution modes in the study area：weak deformation mode,medium deformation mode and strong deformation mode.And the distribution ranges of various crack modes are analyzed.

关 键 词：现今应力场 肯基亚克 裂缝预测 分布模式 

分 类 号：TE321[石油与天然气工程—油气田开发工程]