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详细分析了王府凹陷上侏罗统和下白垩统砂岩储层的成岩作用及其对储层物性的影响 .成岩作用的主要类型包括机械压实作用、胶结作用、交代作用、溶蚀作用、破裂作用等 ,成岩阶段属晚成岩 A期 .其中 ,机械压实作用、化学胶结作用是导致砂岩孔隙度降低、储集性能变差的主要因素 .机械压实作用主要表现为软碎屑的塑性变形、颗粒间由点接触向凹凸接触演变 ;胶结作用表现为石英和长石的次生加大、自生粘土矿物、碳酸盐和硬石膏胶结物的依次形成并充填孔隙 .破裂作用及溶蚀作用在一定程度上提高和改善了砂岩储集性能 .影响成岩作用的主要因素为沉积环境、岩石结构、孔隙水性质 .
The diagenesis of upper Jurassic and Lower Cretaceous sandstone reservoirs and its influence on reservoir physical properties are analyzed in detail.The main types of diagenesis include mechanical compaction, cementation, metasomatism, dissolution and rupture Etc. The diagenetic stage belongs to late diagenetic stage A. Among them, mechanical compaction and chemical cementation are the main factors leading to the decrease of porosity and poor reservoir performance of sandstone.The mechanical compaction mainly includes the plastic deformation of soft detritus, Particle contact evolves from point to point, and the cementation shows the secondary increase of quartz and feldspar, followed by the formation and filling of the pores of authigenic clay minerals, carbonate and anhydrite cements. The rupture and dissolution are inevitable The degree of increase and improvement of sandstone reservoir performance.The main factors affecting diagenesis are sedimentary environment, rock structure and pore water property.