西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (2): 1-8.

• 地质勘探 •    下一篇

四川盆地西南部茅口期岩相古地理

田景春1，郭维1，黄平辉2，林小兵1   

  1. 1.“油气藏地质及开发工程”国家重点实验室 成都理工大学，四川成都6100592. 中国石油西南油气田分公司勘探处，四川成都610051
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-04-01 发布日期:2012-04-01

Lithofacies Palaeogeography of Maokou Period in SouthwesternSichuan Basin

Tian Jingchun1, Guo Wei1, Huang Pinghui2, Lin Xiaobing1   

  1. 1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation，Chengdu University of Technology，Chengdu，Sichuan 610059，China；2. Exploration Department，Southwest Oil and Gas Field Company，CNPC，Chengdu，Sichuan 610051，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-04-01 Published:2012-04-01

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摘要： 根据野外露头、钻井、测井等资料, 对四川盆地西南部茅口组的岩性特征及岩相古地理进行了分析。结果表
明，四川盆地西南部地区茅口组为台内浅滩和开阔海微相环境，并可划分出3 个沉积旋回，代表了茅口期的3 次海平
面升降变化。其中第二沉积旋回海平面下降阶段为最重要的成滩期，这一时期浅滩广泛发育亮晶生屑灰岩，局部
高地发育白云岩，经后期东吴运动改造，有望成为具有良好的储集物性特征的储集层。

关键词: 四川盆地西南部, 中二叠统, 茅口组, 岩相古地理, 沉积旋回

Abstract: Abstract：According to the data from field outcrops，drilling section and well logging，the lithologic characteristics and lithofacies
palaeogeography of Maokou Formation in southwest Sichuan Basin are analyzed. The results indicated that Maokou
Formation developed beach and open sea microfacies in southwest Sichuan basin and can be divided into three sedimentary
cycles，which represent the three sea-level fluctuations in Maokou period. The second sedimentary cycle，the phase that sea
level decline，becomes the most important period when shallow beach developed widely with the litholgy of sparite bioclastic
limestone and partial dolomite. Transformed by the later Dongwu movement，shallow beach can be favorable reservoir.

Key words: Southwestern Sichuan Basin, Middle Permian, Maokou Formation, lithofacies palaeogeography, sedimentaryCycle

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