【摘要】 对塔里木盆地不整合面下的碳酸盐岩成岩作用、成岩作用序列和孔隙特征的研究表明：（１）不整合面下的碳酸盐岩储集层所经历的成岩作用有胶结作用、溶蚀作用、白云石化作用、重结晶作用、压实作用、压溶作用、硅化及硅质充填作用、裂缝及其充填作用。其中胶结作用、压实作用、硅化及硅质充填作用是破坏孔隙的主要成岩作用，而溶蚀作用（特别是不整合形成时的大气淡水溶蚀作用）、白云石化作用、压溶作用、破裂作用是产生次生孔隙的主要成岩作用。（２）不整合面下的碳酸盐岩储集层进油期的孔隙全为次生型，主要的孔隙类型有晶间孔、晶间溶孔、胶结物溶孔、基质溶孔、溶洞、溶缝、缝合线。孔径一般为００１～１ｍｍ，溶洞直径为２～１０ｍｍ，孔隙度一般为２％～８％，局部高达１５％更多还原

【Abstract】 Studies on diagenesis, sedimentary sequence and pore characteristics of carbonate rock under unconformable surface in Tarim basin showed that: ① carbonate reservoir under unconformable surface underwent cementation, denudation, dolomitization, recrystallization, compaction, solution, silicification, filling of siliceous cement and fracture, among which cementation, compaction, silicification and filling of siliceous cement were major diagenesis for destroying pores; denudation(especially air water when unconformity formed), dolomitization, solution and fracturing were major diagenesis for forming secondary pores. ② The pores in carbonate reservoir under unconformable surface during hydrocarbon migrating were all to be secondary, among which intercrystalline pore, intercrystalline denudation pore, cement denudation pore, matrix denudation, vugular pore, denudation fracture and stylolite were main pore types, with pore diameter of 0.01～1 mm and vugular pore diameter of 2～10 mm, the porosity of 2%～8%, larger than 15% in local area.更多还原