【摘要】 塔里木北部地区三叠系储层在成岩演化过程中曾经历两期溶蚀作用，深埋成岩环境的晚期溶蚀较早期近地表－浅埋成岩环境溶蚀要剧烈得多，溶蚀作用的最大特点是铝硅酸盐矿物较碳酸盐矿物剧烈。溶蚀作用发生的机理是由于三叠系储层处于８０～１２０℃热窗、成岩流体富含低分子量羧酸、碱度由低分子量羧酸控制，铝硅酸盐和碳酸盐矿物均处于去稳定状态。溶蚀作用的发育程度受控于储层砂体的沉积和岩石学特征以及早期成岩发育程度。更多还原

【Abstract】 Two-phase dissolution occured during the diagenesis of Triassic reservior in Tabei areal and that of late stage under deep-buried diagenesis environment is much stronger than early stage of shallow-buried environment. The dissolution is characterized by higher internsity of Al-silicate minerals than carbonate minerals. It happen3d due to 80°-120°hot window of Triassic reservior, rich low-molecular hydroxylic acid of lithologic fluid which controls the alkality, and unbalance of Al-silicate and carbonate minerals. The development of dissolution is controlled by sedimentary and lithological features of reservior sands, and early diagenesis.更多还原