四川盆地中南部雷口坡组碳酸盐岩成岩作用与孔隙演化  

Diagenesis and porosity evolution of carbonate rocks of the Middle Triassic Leikoupo Formation in the south-central part of Sichuan Basin,China

作　　者：秦川[1] 刘树根[1] 张长俊[1] 龚昌明[2] 赵异华[2] 邱文彬[2] 汪华[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]中国石油西南油气田分公司川中油气矿,四川遂宁629000

出　　处：《成都理工大学学报（自然科学版）》2009年第3期276-281,共6页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：中三叠统雷口坡组是川中地区的主要产气层段。通过薄片鉴定,对T2l4和T2l3-3及底部T2l1-1亚段碳酸盐岩的成岩作用类型、序列与孔隙类型及其演化模式进行了研究,认为沉积环境、成岩作用、成岩环境共同影响了储集物性。建设性成岩作用有溶蚀作用、混合水白云石化作用;主要的孔隙类型有晶间孔、粒内溶孔(铸模孔)、粒间溶孔。The Leikoupo Formation of Middle Triassic is the main gas-producing layer in the central Sichuan Basin. This paper primarily studies the diagenesis type and succession, pore type and porosity evolution about the formation by analysing the thin sections. Both sedimentary environment and diagenetic environment have influence on the physical property of the rocks in the formation. The constructive diagenesis is dissolution and mixing-water dolomitization. The main pore types are intercrystal pore and solution pore.

关 键 词：中三叠统 雷口坡组 成岩作用 孔隙演化 四川盆地 

分 类 号：P588.245[天文地球—岩石学] TE122.221[天文地球—地质学]