复杂注水条件下储层电性物性变化机理实验研究  

Core Experiments on Electric and Petrophysical Properties of Formation Under the Condition of Complex Water Injection

作　　者：刘正锋[1] 王天波[1] 

机构地区：[1]中石化河南油田测井公司,河南南阳473132

出　　处：《测井技术》2005年第4期293-298,共6页Well Logging Technology

摘　　要：通过利用不同注入水和原生水矿化度对比分析研究,确定了水淹层电阻率变化的主导因素为注入水与原生水矿化度的对比关系,同时研究了不同因素对电性变化的作用机理,分析了岩心孔隙度、渗透率在不同水淹级别下的变化规律。储层水淹后电阻率出现“S”型变化需要满足一定的矿化度对比条件;在束缚水饱和度、孔隙结构有其他条件相同的的情况下,束缚水饱和度越高,电阻率变化形态越不明显;孔隙喉道越大,电阻率形态的变化越复杂。随着不同曲体强度的变化,孔隙度和渗透率越大,孔隙度和渗透率的相对变化量越小,越不明显;反之相对变化量越大。分析结果为更深入地研究水淹层电性、物性变化规律奠定了基础。Relation between injected water and original water salinity in the core shows that the relation mainly affects the resistivity changes in the flooded strata. Different factors have different effects on electric and petrophysical properties of formation. Resistivity in the flooded zones appeared as type “S” because the injected water results in more conductivity paths in the core and the total core＇s resistivity goes up with the increase of the original water salinity. The higher is the irreducible water saturation, not clearer are the resistivity changes when the irreducible water saturation and pore structure do not change. The bigger the pore throats, and the more complex the resistivity changes. As the core＇s strength changes differently, the larger the porosity and resistivity, the smaller and not clearer their relative changes, and in contrast, their relative ehanges become larger.

关 键 词：水淹层 岩心分析 电阻率 孔隙度 渗透率 实验研究 

分 类 号：P631.84[天文地球—地质矿产勘探] TE122.23[天文地球—地质学]