石油学报 ›› 2008, Vol. 29 ›› Issue (2): 219-225.DOI: 10.7623/syxb200802011

• 地质勘探 • 上一篇    下一篇

磨溪气田嘉二段陆表海型台地内沉积微相研究

谭秀成1, 邹娟1, 李凌1, 周彦1, 罗冰1, 刘宏1, 姚宴波2, 林建平2   

  1. 1. 西南石油大学资源与环境学院, 四川成都, 610500;
    2. 中国石油西南油气田公司川中油气矿, 四川遂宁, 629000
  • 收稿日期:2007-02-06 修回日期:2007-08-27 出版日期:2008-03-25 发布日期:2010-05-21
  • 作者简介:谭秀成,男,1970年3月生,2007年获成都理工大学理学博士学位,现为西南石油大学讲师,主要从事储层沉积学研究.E-mail:tanxiucheng70@163.com
  • 基金资助:
    中国石油天然气集团公司石油科技中青年创新基金项目(06E1018)“碳酸盐岩同生岩溶型储层发育规律及预测模型研究”;四川省教育厅省级重点学科建设项目(SZD0414)联合资助

Research on sedimentary microfacies of the epicontinental sea platform of Jia 2 Member in Moxi Gas Field

TAN Xiucheng1, ZOU Juan1, LI Ling1, ZHOU Yan1, LUO Bing1, LIU Hong1, YAO Yanbo2, LIN Jianping2   

  1. 1. College of Resource and Environment, Southwest Petroleum University, Chengdu 610500, China;
    2. Central Sichuan Mining District, PetroChina Southwest Oil and Gas Field Company, Suining 629000, China
  • Received:2007-02-06 Revised:2007-08-27 Online:2008-03-25 Published:2010-05-21

摘要: 结合四川盆地下三叠统嘉陵江组区域地质背景资料,对磨溪嘉二段的岩石类型组合、沉积构造、沉积韵律、古气候及成岩演化等沉积相标志的详细分析表明,嘉二段并非普遍发育潮坪环境,而是属于陆表海型碳酸盐岩局限—蒸发海台地相沉积,并可进一步划分为台坪、粒屑滩、滩间海、局限泻湖、蒸发泻湖5种亚相及20余种微相,类潮坪相仅出现在嘉二~2B层沉积期。对重点层段沉积微相平面展布特征的研究表明,嘉二沉积期沉积微相演化受沉积古地貌特征、古气候及相对海平面变化共同控制,纵向上沉积微相展布具有一定的继承性。建立了适合本区嘉二段颗粒岩和粉晶云岩沉积时期的陆表海碳酸盐岩台地相的沉积演化模式。

关键词: 沉积微相, 碳酸盐岩, 陆表海台地, 沉积演化模式, 嘉陵江组, 磨溪气田, 四川盆地

Abstract: Based on the geologic background of Jia 2 Member in Jialingjiang Formation of the lower Triassic in Sichuan Basin, the lithology, sedimentary structures, sedimentary rhyme, palaeoclimate and diagenetic evolution were analyzed. It is indicated that the tidal flat facies are not broadly developed in Jia 2 Member of Moxi Gas Field. Jia 2 Member was restricted to the evaporate epicontinental sea carbonate platform deposits. The sedimentary facies in Jia 2 Member of Moxi Gas Field mainly include five sub-facies of platform flat, grain shoal, inter-bank sea, restricted lagoon and evaporate lagoon. The five sub-facies were divided into over 20 microfacies. The depositional characteristics of similar tidal-flat environment existed only in Jia 2 Member B bed. The analysis on the sedimentary microfacies distribution of the key formations shows that the sedimentary environment evolution is subject to palaeogeography characteristic, relative sea-level and palaeoclimate, and the sedimentary microfacies distribution characteristics are inheritable vertically. The sedimentary evolution model was given which was suitable for the epicontinental sea carbonate platform facies in the deposition of grained stone and dolomite rock of Jia 2 Member.

Key words: sedimentary microfacies, carbonate rock, epicontinental sea platform, sedimentary evolution model, Jialingjiang Formation, Moxi Gas Field, Sichuan Basin

中图分类号: