川东南寒武系娄山关群白云岩成岩作用特征

江文剑; 侯明才; 邢凤存; 徐胜林; 林良彪

doi:10.11781/sysydz201603311

川东南寒武系娄山关群白云岩成岩作用特征

doi: 10.11781/sysydz201603311

江文剑¹,
侯明才^1,2, ,,
邢凤存^1,2,
徐胜林¹,
林良彪^1,2

1.
成都理工大学沉积地质研究院, 成都 610059
2. 油气藏地质与开发工程国家重点实验室(成都理工大学), 成都 610059

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。

详细信息

作者简介:
江文剑(1984-),男,在读博士研究生,从事储层沉积学方面研究。E-mail:jiangwj2014@qq.com。

通讯作者:
侯明才(1968-),男,教授,博士生导师,从事大地构造沉积学和层序岩相古地理学的教学和科研工作。E-mail:houmc@cdut.edu.cn。

中图分类号: TE122.2⁺3
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出版历程
- 收稿日期: 2015-07-01
- 修回日期: 2016-04-08
- 刊出日期: 2016-05-28

Diagenetic characteristics of dolomites in the Cambrian Loushanguan Group in southeastern Sichuan Basin

1.
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China

摘要

摘要: 通过对川东南寒武系娄山关群两剖面(京竹和中坝)的白云岩及后期充填物的岩石学、碳氧同位素和阴极发光特征综合研究,系统分析了娄山关群白云岩成岩作用类型及特征,其主要的成岩作用类型包括白云岩化作用、溶蚀作用、胶结作用和硅化作用等,认为白云岩成因有4种:准同生、回流渗透、埋藏和热液白云岩化作用。并将成岩作用阶段划分为准同生、早成岩、晚成岩和表生成岩等4个阶段。同时,分析了成岩演化的影响因素及其对孔隙发育的影响,其成岩演化主要受到沉积环境、沉积物原始结构特征和沉积旋回等因素的影响。形成于潮坪潟湖环境的泥微晶白云岩,原始孔隙不发育,受后期成岩流体改造较弱,孔隙不发育;形成于滩相环境的颗粒白云岩和晶粒白云岩,原始孔隙较发育,后期成岩流体改造较强,孔隙发育,可以作为良好的油气储集层。
- 成岩作用 /
- 白云岩 /
- 娄山关群 /
- 寒武系 /
- 川东南地区
Abstract: Based on the comprehensive studies of petrology, carbon and oxygen isotopes, and cathodoluminescence 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, buried, and hydrothermal. Four diagenetic stages were divided into penecontemporaneous, early, late and epidiagenetic. 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 diagenetic 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.
- diagenetic effect /
- dolomite /
- Loushanguan Group /
- Cambrian /
- southeastern Sichuan Basin

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川东南寒武系娄山关群白云岩成岩作用特征

doi: 10.11781/sysydz201603311

作者简介:
江文剑(1984-),男,在读博士研究生,从事储层沉积学方面研究。E-mail:jiangwj2014@qq.com。

通讯作者:
侯明才(1968-),男,教授,博士生导师,从事大地构造沉积学和层序岩相古地理学的教学和科研工作。E-mail:houmc@cdut.edu.cn。

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Diagenetic characteristics of dolomites in the Cambrian Loushanguan Group in southeastern Sichuan Basin

计量

目录

留言板

川东南寒武系娄山关群白云岩成岩作用特征

doi: 10.11781/sysydz201603311

作者简介: 江文剑(1984-),男,在读博士研究生,从事储层沉积学方面研究。E-mail:jiangwj2014@qq.com。

通讯作者: 侯明才(1968-),男,教授,博士生导师,从事大地构造沉积学和层序岩相古地理学的教学和科研工作。E-mail:houmc@cdut.edu.cn。

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出版历程

Diagenetic characteristics of dolomites in the Cambrian Loushanguan Group in southeastern Sichuan Basin

计量

出版历程

目录

作者简介:
江文剑(1984-),男,在读博士研究生,从事储层沉积学方面研究。E-mail:jiangwj2014@qq.com。

通讯作者:
侯明才(1968-),男,教授,博士生导师,从事大地构造沉积学和层序岩相古地理学的教学和科研工作。E-mail:houmc@cdut.edu.cn。