川中磨溪构造下三叠统嘉二段储集物性及其控制因素

下三叠统嘉陵江组二段是四川盆地中部磨溪地区最为发育和有利的层段.在薄片鉴定的基础上,主要通过有利储集相带与钻井有利层位进行对比,对其成岩作用类型及序列与孔隙演化及其特征进行详细研究,得出研究区主要为开阔台地-局限台地相过渡沉积,沉积相对储集物性控制因素相对较小,成岩改造作用较大.建设性成岩作用主要有白云石化和溶蚀作用,孔隙类型主要为白云石晶间孔及溶蚀孔.并提出对该区勘探不能只局限于构造高点,应加强对成岩作用研究,并划分出建设性成岩作用区块.

Reservoir and controlling factors of Member 2 of the Triassic Jialingjiang Formation in Moxi area in the center of Sichuan,China

Member 2 of the Lower Triassic Jialingjiang Formation is the best developed and advantageous segment in the Moxi province in the center of Sichuan. This paper primarily studies the types, diagenetic successions and porosity evolution of carbonate rock based on the thin sections and by contrasting available reservoir facies belts and drilling available layers. The facies mostly passages from the open carbonate rock platform to local carbonate rock platform. Sedimentary facies has a little influence on the controlling factors but much on diagenesis. The constructive diagenesis are primarily dolomization and dissolution. The pore types primarily are dolomite intercrystal pores and solution pores. The paper suggests that the study of diagenesis should be strengthened, that the exploration of this area can not be localized at the high point of structures, and that the constructive diagenesis province should be located.