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通过扫描电镜等技术,确定了东营凹陷现河地区储层粘土矿物主要为高岭石、绿泥石、伊利石和伊/蒙间层(I/S)。粘土矿物的成岩作用和粘土矿物的固有特性影响了储层的物性。不同粘土矿物对储层的潜在影响机理不同。高岭石主要引起流速敏感性损害;伊利石主要为微粒运移引起速敏损害和微孔道吸水引起水锁损害;绿泥石主要对储层的潜在损害为强酸敏感;伊/蒙间层类对储层的潜在损害为水敏、水锁、速敏。
By scanning electron microscopy and other techniques, it is determined that the clay minerals in the Xianhe area of Dongying depression are mainly kaolinite, chlorite, illite and I / S. The diagenesis of clay minerals and the inherent properties of clay minerals affect reservoir properties. Different clay minerals have different potential reservoir mechanisms. Kaolinite mainly caused the velocity-sensitive damage; illite mainly caused the water-lock damage caused by the migration of particles due to speed-sensitive damage and microporous water absorption; the potential damage of chlorite to the reservoir was sensitive to strong acid; Potential damage to reservoirs is water sensitivity, water lock, and speed sensitivity.