四川盆地川西坳陷中段须四段层序结构特征

陈贤良; 纪友亮; 杨克明

doi:10.11781/sysydz201701058

四川盆地川西坳陷中段须四段层序结构特征

doi: 10.11781/sysydz201701058

1.
西安科技大学地质与环境学院, 西安 710054
2. 中国石油大学(北京) 地球科学学院, 北京 102249
3. 中国石油化工股份有限公司西南油气分公司, 成都 610016

基金项目: 国家自然科学基金面上项目“地质历史时期碎屑岩储层物性参数恢复的定量研究”（41272157）和西安科技大学博士启动基金项目“前陆盆地层序结构内储层成岩演化特征研究”（2015QDJ075）联合资助。

详细信息

作者简介:
陈贤良(1985-),女,博士,讲师,从事层序地层学和沉积学教学与科研工作。E-mail:chenxianliang1985@163.com。

中图分类号: TE121.3
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- 被引次数: 0
出版历程
- 收稿日期: 2016-03-24
- 修回日期: 2016-11-09
- 刊出日期: 2017-01-28

Sequence characteristics of the fourth member of Xujiahe Formation in the middle area of Western Sichuan Depression, Sichuan Basin

1.
College of Geology & Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China
2. College of Geoscience, China University of Petroleum, Beijing 102249, China
3. SINOPEC Southwest Oil & Gas Company, Chengdu, Sichuan 610016, China

摘要

摘要: 利用野外露头、岩心、测/录井及地震解释等资料和手段，对四川盆地川西坳陷中段须四段层序结构特征进行研究。须四段为一个三级层序，可进一步划分出低位体系域、湖侵体系域和高位体系域，建立了等时层序地层格架，阐明其内部主要发育冲积扇—冲积平原—三角洲—湖泊沉积体系；依据层序地层结构特征，划分出非对称A1型、非对称A2型和对称型3种类型，其中A1型发育在龙门山山前地区，A2型主要发育在中江—洛带地区，对称型主要发育在龙门山山前地区和中江—洛带地区之间的过渡凹陷区；非对称A2型及对称型层序低位体系域和高位体系域是研究区优质储层的有利发育区。
- 层序地层格架 /
- 层序结构 /
- 须四段 /
- 三叠系 /
- 川西坳陷中段 /
- 四川盆地
Abstract: The sequence characteristics of the fourth member of Xujiahe Formation in the middle area of Western Sichuan Depression have been studied by using outcrop, core, logging and seismic data. The fourth member of Xujiahe Formation is a three-order sequence and was divided into lowstand system tract, transgressive system tract and highstand system tract. An isochronous sequence stratigraphic framework was established, and its internal sedimentary characteristics were clarified, mainly developing an alluvial fan-alluvial plain-delta-lacustrine depositional system. The sequence was divided into three types based on depositional settings: symmetrical type, asymmetrical type A1 and A2. Type A1 developed in the piedmont region before the Longmen Mountain, the type A2 mainly developed in Zhongjiang-Luodai area, and the symmetrical type mainly developed in the piedmont region before the Longmen Mountain and the depression between Zhongjiang and Luodai. LST and HST of the asymmetric type and symmetric type A2 sequence were advantageous for the development of high-quality reservoirs.
- sequence stratigraphic framework /
- sequence structure /
- fourth member of Xujiahe Formation /
- Triassic /
- middle area of Western Sichuan Depression /
- Sichuan Basin

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