油气地质

四川盆地三台—盐亭地区上三叠统须家河组沉积体系分析

  • 刘义坤 ,
  • 王永平 ,
  • 唐慧敏 ,
  • 王凤娇 ,
  • 陈凌云
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  • 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 勘探开发研究院,成都 610051
李雅楠(1989-),女,成都理工大学在读硕士研究生,研究方向为沉积相和储层沉积学。 地址:(610059)四川省成都市成华区二仙桥东三路 1 号成都理工大学沉积地质研究院。 E-mail:348399951@qq.com。

网络出版日期: 2014-04-06

基金资助

国家重大科技专项“四川盆地岩性油气藏富集规律与目标评价”(编号:2011ZX05001-005-01)部分研究成果

Sedimentary system of Upper Triassic Xujiahe Formation in Santai-Yanting area, Sichuan Basin

  • LIU Yikun ,
  • WANG Yongping ,
  • TANG Huimin ,
  • WANG Fengjiao ,
  • CHEN Lingyun
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  • 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China; 2. Research Institute of Exploration and Development, PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, China

Online published: 2014-04-06

摘要

通过岩心及薄片观察,从岩石学、沉积构造、古生物标志及测井曲线特征等方面,对四川盆地三台— 盐亭地区须家河组沉积体系进行了深入分析。 结果表明:该区须家河组为一套三角洲、湖泊及有障壁海岸的多类型沉积体系复合体,其中三角洲沉积体系根据进入蓄水盆地中地表径流水体性质的不同可划分为辫状河三角洲和曲流河三角洲,并可进一步识别出三角洲平原、三角洲前缘及前三角洲 3 种亚相沉积;湖泊沉积体系发育滨湖和浅湖 2 种亚相沉积;有障壁海岸沉积体系发育潮坪亚相沉积。 在此基础上,分别建立了辫状河三角洲及曲流河三角洲沉积相模式,并分析了该区须家河组地层在不同时期的沉积相与微相的展布特征及空间配置关系。

本文引用格式

刘义坤 , 王永平 , 唐慧敏 , 王凤娇 , 陈凌云 . 四川盆地三台—盐亭地区上三叠统须家河组沉积体系分析[J]. 岩性油气藏, 2014 , 26(2) : 38 -46 . DOI: 10.3969/j.issn.1673-8926.2014.02.007

Abstract

Based on the core and thin section observation, this paper analyzed the sedimentary system of Xujiahe Formation in Santai-Yanting area from the aspects of petrology, sedimentary structures, paleontology evidence and well logging. It is believed that the sedimentary system includes delta, lake and barrier coast. Among them, delta sedimentary system can be divided into braided river delta and meandering river delta in accordance with the different properties of water runoff into the water basin, furthermore, both of the braided river delta and meandering river delta can be subdivided into three sub-facies, including delta plain, delta front and prodelta. Lake sedimentary system consists of two sub-facies, including lakeshore and shallow lake. Barrier coast sedimentary system mainly consists of tidal flat sub-facies. On this basis, the sedimentary facies models of braided river delta and meandering river delta were established respectively, and the distribution characteristics and space allocating relation of facies and sub-facies in different periods of Xujiahe Formation in the study area were analyzed.

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