水洗影响砂岩储集层物性的实验研究

Experiment Research on Effect of Water Washing to Physical Properties of Sandstone

以轮南油田LN2TⅠ油藏为例,统计水洗作用对早期取样岩石物性的影响,利用取自该油田的流体和岩芯进行高温高压条件下的水洗模拟实验。实验表明,该储层水洗后未形成大孔道,造成水提前突破的主要原因可能是TI层内存在平面与纵向非均质性。现场生产过程中注入水量较小,对储集层物性影响微弱。

Taking Lunnan oilfield for example,we statistic the impact of washing effect on the properties of rock,utilize the formation water and cores from Lunnan oilfield to carry out the experiments of water washing under high temperature and high pressure.Both of the two results indicate that the macroscopic throats in sandstone reservoir are not formed and the main reason of water breakthrough early is the lateral and vertical heterogeneity on the layer TI.Physical properties change weakly due to the water yield injection are few during production.