摘要
根据四川盆地北部中三叠统雷口坡组雷四段野外剖面及岩心的宏观及微观特征,结合常规物性资料,对其储集层的储集空间类型、岩性与物性、空间分布等基本特征以及主要控制因素进行了较为深入的研究。研究认为储集层集中分布于雷四段顶部的雷四3亚段,主要的储集岩类为颗粒白云岩,其次是晶粒白云岩;储集空间以粒间溶孔、粒内溶孔和晶间溶孔常见,裂缝为主要的渗透空间。储集层的形成与演化主要受到沉积相和成岩作用的影响,其中台内点滩是最有利储集层发育的相带,表生期岩溶作用和埋藏溶解作用导致主要储集空间的形成。
Based on macroscopic and microscnpic features of outcrop sections and drilling cores of the Let-4 member of Leiknupo formation of Middle Triassic in northern Sichuan basin, combined with the conventional petrophysical data, this paper studies in detail the basic features of the reservoir space types, lithologie and petrnphysical properties, space distribution, as well as the main controlling factors. The reservoir is mainly distributed in Let-4（3） sub-member of the Leikoupo formation, with lithology of grain dolostone, next to crystalline dolostone. The intergranular, intragranular and intercrystal dissolved pores are mainly reservoir space, cracks as the main space of percolation. The reservoir formatinn and evolution are mainly affected hv sedimentary tholes and diagenesis, among which intra-platform patch beach is the most faworable facies for developing reservoirs, and supergene karstification anti burial dissolution give rise to the main storage spaces.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2012年第5期547-549,共3页
Xinjiang Petroleum Geology
关键词
四川盆地
北部地区
雷口坡组
雷四段
储集层
Sichuan hasin
northern part
Leikoupo formation
Let-4 member
reservoir
