王伟,何金先,张晓丽,李聚豪,黄正鑫,孙沛琳,宋佳遥

• 1:中国矿业大学煤层气资源与成藏过程教育部重点实验室
• 2:中国矿业大学资源与地球科学学院

摘要(Abstract)：

四川南部筠连地区乐平组煤层气资源储量大，勘探程度总体较低，制约了煤及煤系气资源的开采。煤层聚集、砂岩储层展布受控于沉积相及层序地层格架控制。为探究研究区内煤层发育特征及煤层聚集的沉积控因，以钻井和岩心资料为基础，利用层序地层学原理，识别出区内乐平组发育的Ⅲ级层序界面并划分层序，构建层序地层格架；厘清研究区含煤地层名称；利用岩相标志及测井响应特征进行地层对比、单井沉积相划分及连井沉积相对比，明确沉积相在各层序内的发育特征。结果表明，研究区乐平组共存在四个层序界面，依据四个层序界面划分出三个Ⅲ级层序。以测井响应特征为主体，共识别出两类沉积相，五类沉积亚相及九类沉积微相。第一层序（SQ1）和第二层序（SQ2）主要发育河流相，第三层序（SQ3）发育潮坪相。在剖面上，整体表现为由河流相至潮坪相的演化特征；自西向东体现为河流-潮坪-潟湖相的演化趋势。

关键词(KeyWords)： 筠连地区;层序地层;沉积相;上二叠统;乐平组

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2021YFC2902003）;; 国家自然科学基金项目（41702170）

作者(Author): 王伟,何金先,张晓丽,李聚豪,黄正鑫,孙沛琳,宋佳遥

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