论文部分内容阅读
根据煤层气的危害特性和赋存现状,开展基于已开采矿区的煤层气开发可行性分析和垂直钻井风险评估。以湖南湘中地区煤层气统计资料和地质结构特征为研究基础,先从地层、构造、煤储层物性以及含气量几个方面对该区煤层气开发潜力作出综合分析评价。然后从工程安全方面阐明钻探风险,提出有利于煤层保护、有效钻进减少事故的安全技术措施。最后提出煤层气的赋存特性决定钻采开发模式,必须紧紧围绕“安全高效”来制定钻采开发方案,把风险降到最小。
Based on the hazard characteristics of CBM and its occurrence status, the CBM development feasibility study and vertical drilling risk assessment based on the mined area have been carried out. Based on the CBM statistical data and geological structural features in the Hunan central Hunan Province, this paper first makes a comprehensive analysis and appraisal of CBM development potential in this area from the aspects of strata, structure, physical properties of coal reservoirs and gas content. Then, the risk of drilling is clarified from the aspect of engineering safety, and the safety technical measures that are conducive to coal seam protection and effective drilling to reduce accidents are put forward. Finally, it is proposed that the occurrence characteristics of CBM determine the development mode of drilling and production, and the drilling and mining development plan must be formulated around “safe and efficient” to minimize the risk.