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江陵凹陷新沟咀组下段粘土矿物组合与分布受沉积环境影响明显,高岭石仅分布于三角洲平原相带中,粘土矿物以伊利石、高岭石和有序-无序伊蒙混层及少数绿泥石为特征;三角洲前缘相中粘土矿物组合则为伊利石、绿泥石和有序伊蒙混层;前三角洲及湖盆泥岩相中则以伊利石和绿泥石两种粘土矿物为主。储层的敏感性实验结果表明,本区储层具有中等强度速敏、强—特强水敏、强盐敏和强酸敏性。
The clay mineral assemblages and distribution in the lower part of the Xingouzui Formation in Jiangling Depression are significantly affected by the depositional environment. Kaolinite is only distributed in delta plain facies. The clay minerals are characterized by illite, kaolinite and ordered-disordered smells and few green Mudstone; the clay mineral assemblages in the delta front facies are illite, chlorite and ordered moutheastern mixed layer; the former delta and lake mudstone facies are mainly two types of illite and chlorite clay minerals. Reservoir sensitivity test results show that the reservoir in this area have moderate-intensity fast-sensitive, strong - special water-sensitive, strong salt sensitivity and strong acid-sensitivity.