【摘要】 马朗凹陷二叠系芦草沟组以湖相沉积为主,岩石类型多,主要为碎屑岩、碳酸盐岩和火山岩.粘土矿物类型有伊/蒙混层、伊利石、高岭石、绿泥石和绿/蒙混层,以伊/蒙混层为主,缺乏蒙皂石.粘土矿物分布模式为不正常转化型.储层物性差,平均孔隙度为 2.1%~9.7%,渗透率一般小于 0.05×10-3μm2.孔隙类型有原生孔隙、溶蚀孔隙和裂缝,以溶蚀孔隙、晶间溶孔为主.芦草沟组具有强水敏、强速敏、强土酸敏、中等盐酸敏和中等盐敏特征.储层敏感性空间分布主要受沉积相控制.更多还原

【Abstract】 Limnetic facies sedimentation is the most part of Permain Lucaogou formation’s. It have characters of mang styles rock, complex Slime’ component in Malang depression. The styles of clay include I/S,illite, kaolonite, cholorice and C/S. It has the mostly content of I/S and is short of S. The model of distribution of clay minerals is abnormal transformation style. The reservoir physical characters of it are worse. Average of Φ is about 2.1% to 9.7% ,seepage rate commonly is less than 0.05×10-3μm2. The styles of pore include protogenesis pore, erosion pore and split. Intercrystal porosity occupy mostly part of erosion pore. Lucaogou formation pocess high water-sensitive, high speed-sensitive, high mud acid-sensitive, middle chlorohydric acid-sensitive and middle salt-sensitive. The space of distribution of reservoir sensitivity is controlled by sedimentary facies.更多还原