储层水洗后结构变化规律研究

The Research of Reservoir Structural Changes after Water Flooding

单华生 姚光庆 周锋德

SHAN Hua-sheng YAO Guang-qing ZHOU Feng-de

中国地质大学 资源学院, 湖北 武汉 430074

Resource Faculty, China University of Geosciences, Wuhan 430074, China

通过室内试验并结合现场资料的分析,对我国典型油气田的储层长期水洗后结构变化规律进行了研究。对储层水洗后其结构变化及变化程度、方向等规律进行了初步的总结,其研究结果表明:(1)孔隙度、渗透率等储层参数的变化跟储层的成藏原始地质年代和环境有很大的关系;(2)孔隙类型发生了变化,粘土矿物、泥质含量都在减小;(3)储层的亲水性增强;(4)储层不同程度地受到伤害。并总结了引起这些变化的主要因素,具有一定的实际应用价值。

After the oil reservoir being water flooded for a long time, its reservoir structure is changed based on laboratory tests and field data. This paper studies the rule of the changes about our model oil field thor-oughly by studying the data of geology, well logging, testing and production performance from the aspects of basic characteristics of the reservoir. The variation of the pore structure is studied. The result of the study shows that the changes of permeability and porosity of the reservoir is linked to the originality environment. The pore type has been changed, also the sensitivity minerals. The main reason of the changes is described at last. It is very useful for the other oil field.