四川前陆盆地中西部须家河组成岩作用与成岩相  

Diagenesis and diagenetic facies of Xujiahe Formation in the central west of Sichuan foreland basin

作　　者：戴朝成[1] 郑荣才[1] 朱如凯[2] 李凤杰[1] 高志勇[2] 

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]中国石油勘探开发研究院油气储层重点实验室,北京100083

出　　处：《成都理工大学学报（自然科学版）》2011年第2期211-219,共9页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重大专项(2008ZX05000-003-01)

摘　　要：四川前陆盆地由于构造相对复杂,探讨不同构造带上成岩作用和成岩相差异对储层预测具有重要意义。在沉积相、铸体薄片观察和岩矿分析数据基础上,对各构造带上须家河组砂岩的成岩作用进行系统研究。得出逆冲推覆带前缘以压实作用和破裂作用为主;川西前渊坳陷带以压实和压溶作用为主;前陆斜坡和前陆隆起带压实作用相对较弱,绿泥石环边胶结作用和溶蚀作用发育,其中起破坏作用的成岩作用主要有压实-压溶作用、胶结作用,起建设性的成岩作用主要有早期绿泥石环边胶结作用、溶蚀作用和破裂作用。在成岩作用研究的基础上,进行了成岩相划分及成岩相组合特征分析,将须家河组砂岩划分为3种成岩相组合,其中压实-破裂-胶结成岩相和胶结-溶蚀成岩相为最有利于储层发育的成岩相带。The structure in the Sichuan foreland basin is complicated,so the research on the differences of diagenesis and diagenetic facies in different tectonic zones is very significant to the reservoir prediction.Based on the analyses of sedimentary facies,cast thin slices,rock and mineral logging data,diagenesis of the sandstones in different tectonic zones of Xujiahe Formation have been researched systematically.The conclusion shows that in the thrusting nappe tectonic zone,there are mainly compaction and cataclasis.In the western depression,there are mainly compaction and pressolution,while in the ramp region and the uplift zone,the compaction is relatively weak and the rim agglutination of chlorite the compaction and denudation are relatively develop.The destructive diagenesis is mainly the compaction-pressure solution and cementation.The constructive diagenesis is mainly the rim agglutination of chlorite,denudation and cataclasis.Based on the research of diagenesis,the diagenetic facies is divided,and the diagenetic facies association of Xujiahe Formation sandstone is divided into three types,the diagenetic facies which is beneficial to the reservoir development are compaction-clastation-cementation and cementation-denudation types.

关 键 词：四川前陆盆地 须家河组 成岩作用 成岩相 

分 类 号：P581[天文地球—岩石学]