CAJ | 학술논문

以钻井岩芯及露头剖面样品的镜下岩石学特征为基础，以大量薄片观察及全岩X衍射、同位素分析、CT扫描等实验分析为依据，对四川盆地中部地区下侏罗统大安寨组储层进行了研究。认为大安寨段储集岩类型可以主要分为结晶介壳灰岩及泥质-有机质介壳灰岩两大类。而储集空间主要有溶蚀孔、晶间隙、壳内溶孔、壳缘隙、壳间隙、介壳微缝、层间缝、构造缝等。储层的发育主要受到沉积微相、成岩作用、溶蚀作用以及构造破裂作用等因素控制。其中沉积微相是储层发育的物质基础，也是有利储层得以保存的条件；溶蚀作用及构造裂缝是储层改善的关键因素；而压实、压溶、胶结、交代等成岩作用则对储层的发育是不利的。
이찬정암심급로두부면양품적경하암석학특정위기출，이대량박편관찰급전암X연사、동위소분석、CT소묘등실험분석위의거，대사천분지중부지구하주라통대안채조저층진행료연구。인위대안채단저집암류형가이주요분위결정개각회암급니질-유궤질개각회암량대류。이저집공간주요유용식공、정간극、각내용공、각연극、각간극、개각미봉、층간봉、구조봉등。저층적발육주요수도침적미상、성암작용、용식작용이급구조파렬작용등인소공제。기중침적미상시저층발육적물질기출，야시유리저층득이보존적조건；용식작용급구조렬봉시저층개선적관건인소；이압실、압용、효결、교대등성암작용칙대저층적발육시불리적。
Based on the lithology characteristics of the drill cores,outcrops profile,and thin slice observation,X-diffraction, isotopic analysis,CT-Scanning,and so on in the central of Sichuan Basin,we studied the reservoir of Da’anzhai Member in lower Jurassic in the paper. The Da’anzhai Member could be divided into two main kinds of reservoir:crystallized shelly limestone and argillaceous-organic shelly limestone. The main storage spaces include emposieu,intercrystalline gap,intra-shell dissolved pore,periphery gap,inter-shell gap,shelly microfracture,interlamination fracture,tectonic fracture and so on. The reservoir was controlled by sedimentary facies,diagenesis,denudation,tectonic disruption and so forth. Sedimentary facies is the environment basements of reservoir;denudation and tectonic disruption are the key factors that the reservoir could be improved;some diagenesis such as compaction,pressolution,cementation and metasomasis are disadvantages for the reservoir.