石油实验地质2016，Vol.38Issue(3)：311-319,9.DOI:10.11781/sysydz201603311
川东南寒武系娄山关群白云岩成岩作用特征
Diagenetic characteristics of dolomites in the Cambrian Loushanguan Group in southeastern Sichuan Basin
摘要
Abstract
Based on the comprehensive studies of petrology, carbon and oxygen isotopes, and cathodolumines?cence characteristics, it has been shown that dolomites from the Jingzhu and Zhongba outcrop sections of the Cambrian Loushanguan Group have experienced multiple diagenetic effects such as dolomitization, dissolution, cementation and silicification. There are four types of dolomite: penecontemporaneous, seepage refluxing, bur?ied, and hydrothermal. Four diagenetic stages were divided into penecontemporaneous, early, late and epidiage?netic. The influencing factors of diagenetic evolution and pore development were analyzed. Diagenetic evolution was mainly affected by the sedimentary environment, the original structure of sediments and sedimentary cycles. Micrite dolomites formed in tidal flat and lagoon environments have a poor original porosity, and the late diage?netic fluid alteration was weak. Grain dolomites and crystalline dolomites formed in a beach environment have lots of primary pores, and their porosity was further improved by late diagenetic fluid alteration. As a result, they are more favorable reservoirs for oil and gas.关键词
成岩作用/白云岩/娄山关群/寒武系/川东南地区Key words
diagenetic effect/dolomite/Loushanguan Group/Cambrian/southeastern Sichuan Basin分类
能源科技引用本文复制引用
江文剑,侯明才,邢凤存,徐胜林,林良彪..川东南寒武系娄山关群白云岩成岩作用特征[J].石油实验地质,2016,38(3):311-319,9.基金项目
中国地质调查局项目(212011220758)和中央财政支持地方高校发展专项资金项目(11000-13z00701)资助. （212011220758）
