低渗储层岩石水敏性损害因素分析  

Low Permeability Reservoir Water Sensitivity Damage Factor Analysis

作　　者：张蕊[1] 臧士宾[1] 任晓娟[1] 

机构地区：[1]延安大学能源与环境工程学院,陕西延安716000

出　　处：《内蒙古石油化工》2012年第21期15-17,共3页Inner Mongolia Petrochemical Industry

摘　　要：通过了解南翼山储集层区域地质与构造特征、岩石学特征、储层物性与孔隙结构,结合南翼山储层岩心水敏室内评价实验数据,客观评价了储层岩石水敏性,研究出低渗储层水敏性损害原因。研究表明,南翼山储层属属典型中-低孔隙度、低-特低渗透率储层,强水敏储层。低渗储层水敏性损害的主要原因是由于岩石中的水敏性粘土矿物(主要是伊利石及微粒绿泥石等)与低矿化度流体接触后发生膨胀使岩石的孔隙空间和喉道缩小甚至堵塞引起岩石的渗透率降低造成的。Through the understanding of Nanyishan reservoir regional geological and tectonic characteristics,petrological characteristics,reservoir properties and pore structure,combination of Nanyishan reservoir core water sensitive indoor experimental data,the objective evaluation of the water sensitivity of the reservoir rock of low permeability reservoir,water sensitivity damage reason.Research shows that,the Nanyishan reservoir belongs to belongs to typical low porosity,low in ultra low permeability reservoir,water sensitive reservoir.Low permeability reservoir water sensitivity damage is mainly caused due to rocks in the water sensitivity of clay minerals(mainly illite and chlorite and other particles) and low salinity fluid occurred after exposure to inflation so that the pore space and throat narrowing or blockage caused by the rock permeability reduction.

关 键 词：低渗储层 水敏性 渗透率 损害机理 矿化度 

分 类 号：P618.13[天文地球—矿床学]