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通过对陕北韩渠油田长 2 储层的岩性、物性、孔隙特征、填隙物成分及地层流体的分析和研究 ,探讨了油田勘探开发过程中引起长 2 储层伤害的主要地质因素 ,认为有机垢堵塞、酸敏以及水锁效应是导致长2 储层伤害的主要地质因素 ,水敏、速敏及流体性质也可引起一定程度的储层伤害。在油田开发过程中 ,建议向地层中注入防蜡剂、粘土稳定剂、铁离子稳定剂、控制注入水的水质标准及增加采油压差等方法来预防或减轻可能出现的储层伤害。
By analyzing and studying the lithology, physical properties, pore features, interstitial composition and formation fluid of Chang 2 reservoir in Hanqu Oilfield in northern Shaanxi, the main geologic factors that cause the damage of Chang 2 reservoir in exploration and development are discussed. It is considered that organic fouling blockage, acid sensitivity and water lock effect are the main geological factors that cause damage to Chang 2 reservoir. Water sensitivity, speed sensitivity and fluid properties may also cause some reservoir damage. In the process of oilfield development, it is recommended to inject paraffin inhibitors, clay stabilizers, ferric ion stabilizers into the formation, control water quality standards for injected water and increase oil production pressure differential to prevent or mitigate potential reservoir damage.