川中一川南过渡带嘉二段成岩作用及其储层发育

研究区嘉二段发育白云岩、青岩、石灰岩夹少量泥岩，属于局限台地和蒸发台地相。砂屑白云岩、细拉白云岩、粉晶白云岩、粉一细晶白云岩、鲡粒灰岩和砂屑灰岩尹:有储集意义。嘉二段经历了海底成岩环境、潮上蒸发成岩环境、大气水混合成岩环境、浅一中深埋藏和深埋藏成岩环境。早期大气淡水淋滤、近地表(蒸发泵和回流渗透)白云石化、埋藏期与有机质演化有关的溶蚀作用是主要的储层建设性成岩作用，构造破裂作用使储层的渗透性得到了改善;压实、压溶、两期石膏胶结作用及粒状方解石胶结作用是储层破坏性成岩作用。针时嘉二段的颖粒破酸盐岩和非颗粒碳酸盐岩，确立了6种成岩序列及孔隙演化模式。

DIAGENFSIS IN THE 2-SECTION OF JIALING.nANG OF THE TRANSITIIONED ZONE BETWEEN THE CENTER PART AND THE SOUTHERN PART OF SICHUAN BASINAND ITS EFFECT TO RESERVOIR DEVELOPMENT

The 2-section of Jialingjiang project belongs to strict and evaporated platform facies. Its main lithology is dolomite, gypsepus rock, limestone and a spot of pulpy rock. Arenite dolomite,politic dolomite, silty dolomite, silty-fine dolomite, politic lime-stone and arenite are of reservoir signification. The 2-section ofJiaLingjiang project has developed from seabed diagenesis，evaporated diagenesis, mixed water diagenesis, shallow-water,middle-water diagenesis environment and deep-water diagenesisenvironment. Early fresh-water leaching, near-surface(evaporating bump and refluent penetration)dolomitization, corrosion which is related to organic evolvement are the main member constructed diagenesis. The tectonic fracture has made its permea-bility better. Besides, the compaction, pressolution，twice gypsum cementation are the 2-section of Jialingjiang project's main destructed diagenesis. The 2-section of Jialingjiang project has two types of studded carbonate rock and non-studded carbonate rock, which have 6 kind of lithology. This paper has created their diagenesis serial and the pore evolving mode.