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Petrographic Characteristics and Their Influence on Coalbed Methane Exploration and Development
Author(s): 
Pages: 16-19
Year: Issue:  6
Journal: Xishan Science & Technology

Keyword:  五轮山矿区 煤岩特征 煤层气 勘探开发;
Abstract: 煤岩特征分析有助于了解煤储层物性优势、优选富集高渗区域与评价单井开发潜力。基于黔西五轮山矿区煤岩和测井资料,采用地质理论与工程实践分析相结合等方法,研究了煤岩与测井响应特征,探讨了其与煤层气勘探开发的关系。结果表明,6-3,9,16号煤层机械强度可能相对于其它煤层较好,但16号煤层整体发育了碎粒煤—糜棱煤结构,显著降低了煤体结构强度及渗透性。采用直井压裂开发方案时,可选择3,5-3,6-3,8,16号等5个煤层分层射孔压裂,有利于排采增效。5号和8号煤层相对施工水平井较为有利,但单一薄煤层水平井作业可能提高产能有限,因此,煤层气井型选择应优先选择直井开发模式。16号煤层不利于水平井工程稳定性,如采用直井开采,应避开其构造煤分层。
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