新疆地区煤层气勘探开发工艺技术难点与对策

    Challenges and strategies for the exploration and development of coalbed methane technology in Xinjiang region

    • 摘要:
      研究目的 为厘清新疆地区煤层气增储上产面临的瓶颈,探索针对性破解对策,助力“十四五”煤层气产业如期完成阶段性任务,
      研究方法 本次梳理新疆地区“十三五”期间煤层气勘探开发条件、发展现状、未解难题和成果,“十四五”初—中期有关煤层气发展的政策、资金、专业机构挂帅等发展契机。
      研究结果 薄煤层勘探开发和煤与煤层气开发利用不协调是削弱产能的首要因素;复杂的构造条件是束缚区域煤层气高效规模开发的客观因素;煤层气勘探未充分关注煤系气综合贡献是限制单井产量的关键因素;深部煤层气地质条件控制程度低是制约全区煤层气增储上产的直接因素。
      结论 结合国内外煤层气开发经验、新疆煤层气勘探开发成果和工作实践认识,提出了4个方面的应对策略:①薄煤层、页岩气、致密砂岩气与主力厚煤层煤层气同勘共采提高单井利用率和产能;②通过数据整合和系统深度研究,提升工程技术与特殊地质条件的适配,实现工程−地质一体化和深部煤层气开发;③老井(枯竭井)创造性灵活构架组合方案低成本提产;④采用“上煤下气”和“先气后煤”理念,推动瓦斯治理与煤层气开发协调发展。从直接提高产量、破解客观制约煤层气井技术束缚、节约成本和能源科学规划利用的思路实施整体策略,以期对新疆煤层气产业振兴起到立竿见影的效果。

       

      Abstract:
      Objective This paper aims to elucidate the constraints impeding the enhancement of coalbed methane reserves and production in the Xinjiang region, and to formulate targeted strategies to overcome these hurdles, thereby facilitating the timely achievement of the coalbed methane industry’s objectives during the "14th Five−Year Plan".
      Methods By reviewing the exploration and development conditions, current state, unresolved challenges, and achievements of coalbed methane during the "13th Five−Year Plan" in Xinjiang, alongside the development opportunities presented by policies, funding, and specialized institutions in the early to mid−period of the "14th Five−Year Plan",
      Results it is believed that the misalignment in the exploration and development of thin coal seams and the utilization of coal and coalbed methane is a primary factor undermining capacity; complex geological structures present an objective constraint on efficient large−scale development in the region; inadequate attention to the comprehensive gas contribution of coal series in exploration limits single−well output; and a low degree of control over deep coalbed methane geological conditions is a direct factor restricting the increase in reserves and production.
      Conclusions Drawing on domestic and international coalbed methane development experiences, Xinjiang’s exploration and development achievements, and practical insights, four strategies are proposed: firstly, the integrated exploration and extraction of thin coal seams, shale gas, tight sandstone gas, and main thick coalbed methane layers to enhance single well utilization and productivity; secondly, through data integration and in−depth research, improving the adaptation of process technology to special geological conditions to achieve engineering−geology integration and deep coalbed methane development; thirdly, creatively leveraging flexible frameworks for the low−cost enhancement of old (depleted) wells; and fourthly, adopting the concepts of "upper coal lower gas" and "gas before coal" to foster coordinated development of gas management and coalbed methane extraction. This comprehensive strategy aims to directly boost production, solve technical constraints on coalbed methane wells, conserve costs, and scientifically plan energy use, thereby swiftly revitalizing the coalbed methane industry in Xinjiang.

       

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