长期水驱砂岩油藏储层参数变化机理研究

<title>udy on the reservoir parameters variation mechanism of sandstone oil reservoir with longterm water drive.

利用不同含水阶段检查井岩心分析资料、测井对子井分析、室内渗流物理模拟、数值模拟等技术手段,研究了砂岩油藏储层参数的变化规律,得出了储层参数随含水率变化的定量表达式,并着重从储层中地层微粒、粘土矿物、支撑方式及孔喉网络等方面对储层参数的变化机理进行了研究。研究表明,由于长期水驱,砂岩储层的渗透率升高,含水率也升高,地层微粒被冲出,粘土矿物含量减少,颗粒支撑方式和孔喉网络连通性发生改变。

<abstract>servoir parameters variation rule is researched using the technical means of core analysis data in inspection chamber at different water cut stages, logging analysis to subwells, laboratory percolation physical simulation, numerical simulation and so on. Quantitative formula of reservoir parameters varying with water cut is deduced. From the variations in formation fines, clayminerals, propping ways and pore throat network, the variation mechanism of reservoir parameters is researched.