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梅放, 康永尚, 李喆, 邓泽, 王伟洪, 顾骄杨. 中高煤阶煤层煤体结构识别测井法适用性评价研究[J]. 煤炭科学技术, 2019, (7).
引用本文: 梅放, 康永尚, 李喆, 邓泽, 王伟洪, 顾骄杨. 中高煤阶煤层煤体结构识别测井法适用性评价研究[J]. 煤炭科学技术, 2019, (7).
MEI Fang, KANG Yongshang, LI Zhe, DENG Ze, WANG Weihong, GU Jiaoyang. Applicability evaluation of logging method for recognition of coal body structure in medium and high rank coal seams[J]. COAL SCIENCE AND TECHNOLOGY, 2019, (7).
Citation: MEI Fang, KANG Yongshang, LI Zhe, DENG Ze, WANG Weihong, GU Jiaoyang. Applicability evaluation of logging method for recognition of coal body structure in medium and high rank coal seams[J]. COAL SCIENCE AND TECHNOLOGY, 2019, (7).

中高煤阶煤层煤体结构识别测井法适用性评价研究

Applicability evaluation of logging method for recognition of coal body structure in medium and high rank coal seams

  • 摘要: 煤体结构对煤储层渗透率有重要影响,渗透率是煤层气勘探开发中的一个核心参数,而测井方法在大量煤层气区块煤体结构识别中得到应用,但尚处于探索阶段。分析研究了前人在不同煤层气区块煤体结构识别中使用的测井参数组合和针对不同煤体结构的测井参数数值,将这些区块按煤岩的镜质组最大反射率平均Ro,max划分为中煤阶区块(0.65%1.90%),基于对前人成果中各测井方法使用情况的统计和对成果中测井参数与煤体结构相关性的分析,探讨不同测井方法在中煤阶煤层和高煤阶煤层的适用性。结果表明:井径测井在中煤阶煤层和高煤阶煤层均适用,自然伽马测井在此2类煤层中均具有参考作用,电阻率测井、声波时差测井和密度测井在此2类煤层中的应用效果差别较大,补偿中子测井在2类煤阶煤层均不适用;因中煤阶煤岩与高煤阶煤岩力学强度差异造成其对外力的变形差异和不同测井参数的敏感性差异,导致不同测井方法对不同煤阶煤层的适用性存在差异。在中煤阶煤层煤体结构识别中,建议以井径测井和电阻率测井作为主要识别方法,以声波时差测井和自然伽马测井作为次要识别方法;在高煤阶煤层煤体结构识别中,建议以井径测井、自然伽马测井和密度测井作为主要识别方法。

     

    Abstract: Coal structure has an important influence on permeability of coal reservoirs, and permeability is a core parameter in coalbed methane exploration and development. Logging method has been applied in coal body structure identification in a large number of coalbed methane blocks, but it is still in the exploratory stage. This paper systematically collects the logging parameter combinations used by the predecessors in the identification of coal structure in different coalbed methane blocks and the logging parameters for different coal structures. The blocks are divided into medium rank coal blocks (0.65%

     

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