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以沁南地区某区块煤层气地质特征、试采数据等资料为依据,分析讨论了该区块煤层气的开发方式、开采层位、井型及井网部署等开发技术对策。重点从井网形式、井网方位、井网密度和井距等三个方面进行了分析和研究,提出了最佳井网部署方案。研究结果表明:该区块煤层气以3#煤层作为目标煤层,采用降压排水的方式,以直井为主、多分支水平井为辅进行开发,井网形式采用矩形井网,井网方位为SE55°和NE35°方向,通过数值模拟技术确定最佳井距为350×300m。
According to the geological characteristics of CBM in a certain area of Qinnan area and the data of trial production and mining, the exploitation methods, exploitation strata, well pattern and deployment of well pattern in the block are analyzed and discussed. The key points are analyzed and researched from three aspects: pattern of well pattern, orientation of well pattern, well pattern density and well spacing, and put forward the plan of optimal well pattern deployment. The results show that CBM in this block takes the seam # 3 as the target coal seam, adopts the method of depressurization and drainage, mainly vertical wells, supplemented by multi-lateral horizontal wells. Rectangular well pattern is used in well pattern, and the well pattern orientation is SE55 ° and NE35 ° directions, and the best well spacing is 350 × 300m by numerical simulation.