乌33井区T_2k^1储层敏感性实验研究

Urho 33 well area the T_2k^1 reservoir sensitivity experiments

通过扫描电镜、X-RD分析了T2k1储层特征以及矿物组成,结合岩心流动实验方法,对该储层的敏感性以及造成敏感性伤害的原因进行分析。最终的研究表明该区块储层具有强速敏性、弱水敏性,盐敏临界盐度在1996～13972mg/L,碱敏程度不强。储层的中低孔、低渗性以及含有的粘土矿物是引起储层敏感性伤害的主要原因,因此在后期的修井作业过程中应该注意这一点。

We analysis the T2k1 reservoir characteristics and mineral composition by Scanning electron microscopy .We analysis the reservoir sensitivity and the cause of the reservoir sensitivity by the method of the core fluxion experiment. The experimental research shows that the reservoir of the block has strong velocity sensitivity, weak water sensitivity and weak alkali sensitivity; the critical salt concentration of salt sensitivity is between 1 996 mg/L and 13 972 mg/L. The main reason for the reservoir sensitivity damage is that the reservoir has low or medium porosity and low permeability and the reservoir contains clay mineral. So we shouid pay attention to this point during the well repairing.