张东地区沙三段储层敏感性评价

Evaluation of Sensitivity of the Third Member of Shahejie Formation in Zhangdong Area

利用张东地区沙三段储层取心岩样,研究了储层岩石的速度敏感性、水敏性、酸敏性和碱敏性。研究结果表明,张东地区沙三段储层岩样速敏损害指数为0.271～0.288,速敏损害程度弱;岩样的水敏损害指数为0.757～0.767,水敏损害程度为强水敏;岩样的土酸酸敏损害指数为0.232～0.280,为中等偏强酸敏;岩样的碱敏损害指数为0.261～0.347,碱敏损害程度弱。储层敏感性评价为后期油田的合理开采提供了科学依据。

According to the standard concerning oil and gas industry in China,the flow velocity sensitivity,water sensitivity,acid sensitivity and alkaline sensitivity of the third member Of Shahejie Formation In Zhangdong Area were tested by using core sample. The result shows the damage coefficient of rock sample velocity sensitivity was 0.271～0.288,velocity sensitivity damage was weak. Water sensitivity coefficient was 0.757～0.767,its damage level was strong. the damage index of mud acid sensitivity of rock sample is 0.232～0.280,which is the acid sensitivity above average. Alkaline sensitivity coefficient was 0.261～0.347,its damage was weak. A basis is provided by evaluation of sensitivity of reservoir for later rational development of oilfield.