新疆地区煤层气勘探开发难点与启示

    • 摘要: 新疆煤层气资源量7.51×1012m3,约占全国的25%,全国煤层气资源量达1×1012m3的10个盆地中,新疆占4个。而“十三五”期间,新疆煤层气目标产量3×108m3,实际产量为0.82×108m3,仅完成27.45%,远低于规划预期。实际情况与结果导向,折射出新疆煤层气产业面临诸多难题。笔者通过梳理新疆煤层气勘探成果、开发进展和当前的产业发展契机,为助力煤层气产业乘势而上,从构造、深度、边际资源、煤矿瓦斯利用现状和煤系气资源潜力5方面剖析羁绊新疆煤层气产业增储上产面临的难题。在分析研究国内外煤层气勘探开发成功案例的基础上,结合本区域的现状,启示“十四五”期间新疆煤层气工作重点:一是通过老区数据系统应用、新区实物资料建库留存、地质-工程一体化建设、工作方法创新、水平井井身质量控制、储层改造技术优化、量化储层改造效果、新成果验证推广,通过7个方面的发力,巩固、深化、优化和提升浅部煤层气地质和工程技术,为开发深部煤层气资源打下基础。二是通过利用“边际资源”、老井改造、老井延深侧钻、老井创造性构架组合措施,4方面低成本提产;采用“上煤下气”和“先气后煤”举措,推动瓦斯治理与煤层气开发协同发展。

       

      Abstract: Xinjiang's coalbed methane resources are 7.51×1012m3, accounting for about 25% of the country's total. Among the 10 basins with 1×1012m3 of coalbed methane resources, Xinjiang accounts for 4 of them. During the "13th Five-Year Plan" period, the target production of Xinjiang CBM was 3×108m3, and the actual production was 0.82×108m3, only 27.45% of which was completed, far lower than the planning expectation. The actual situation and result orientation reflect that Xinjiang CBM industry is facing many difficulties. By reviewing the exploration achievements, development progress and current industrial development opportunities of Xinjiang coalbed methane industry, the author analyzes the problems that hinder Xinjiang coalbed methane industry from five aspects: structure, depth, marginal resources, coal mine gas utilization status and coal measure gas resource potential, in order to help the coalbed methane industry to take advantage of the trend. Based on the analysis and study of successful cases of CBM exploration and development at home and abroad, combined with the current situation of this region, it is revealed that the work priorities of CBM in Xinjiang during the 14th Five-Year Plan period are as follows: First, through the application of data system in the old area, the construction and retention of physical data in the new area, the integration of geology and engineering, the innovation of working methods, the quality control of horizontal Wells, the optimization of reservoir transformation technology, the quantification of reservoir transformation effect, and the verification and promotion of new achievements, the shallow coalbed methane geology and engineering technology are consolidated, deepened, optimized and improved through the efforts of seven aspects. It lays a foundation for developing deep coalbed methane resources. Second, through the use of "marginal resources", old well transformation, old well deep side drilling, old well creative structure combination measures, 4 aspects of low cost production; Adopt the measures of "upper coal and lower gas" and "gas before coal" to promote the coordinated development of gas control and coal bed methane development.

       

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