四川盆地西南部茅口期岩相古地理

Journal of Southwest Petroleum University(Science & Technology Edition)(2012)

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Abstract
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。
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Key words
Lithofacies palaeogeography,Maokou Formation,Middle Permian,Sedimentary Cycle,Southwestern Sichuan Basin
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