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焦煤集团屯兰矿12408 工作面“L”型地面煤层气井抽采试验方案山西蓝焰煤层气工程研究有限责任公司2015 年 3 月目 录1 前言................................................................................................................................11.1 项目背景..............................................................................................................11.2 方案编制依据......................................................................................................12 地质概况.........................................................................................................................22.1 地层......................................................................................................................22.2 构造......................................................................................................................32.3 煤系发育状况......................................................................................................52.4 水文地质特征......................................................................................................63 “L”型井设计方案...........................................................................................................73.1 选区原则..............................................................................................................73.2 井位布置..............................................................................................................73.3 井眼轨迹设计......................................................................................................93.4 井身结构设计....................................................................................................103.5 井身质量要求....................................................................................................113.6 钻井液设计........................................................................................................113.7 录井要求..........