晋城矿区煤体结构及其测井响应特征研究

发布时间：2018-03-08 12:26

本文选题：煤层气　切入点：煤储层　出处：《煤炭科学技术》2015年02期 　论文类型：期刊论文

【摘要】：煤体结构是影响煤层气开发效果的重要因素,准确评价煤体结构是煤层气勘探开发研究的一个关键问题。根据煤体破裂的程度,参照《防治煤与瓦斯突出细则》中煤的破坏类型划分方案,将煤体结构划分为完整结构、块裂结构、碎裂结构、碎粒结构和糜棱结构,前两者为原生结构煤;后三者为构造煤。以沁水盆地南部晋城矿区典型矿井为对象,分析了不同煤体结构的测井响应特征。研究发现:随着煤体破碎程度的增高,井径、声波时差、补偿中子、自然电位值和自然伽马响应逐渐增强,电阻率、密度响应逐渐减弱;原生结构煤的自然伽马、自然电位、补偿中子、井径和声波时响应较弱,电阻率和密度响应较强,构造煤反之。
[Abstract]:Coal structure is an important factor that affects the development effect of coalbed methane. Accurate evaluation of coal body structure is a key problem in coalbed methane exploration and development. According to the scheme of classification of failure types of coal in "rules for preventing and controlling Coal and Gas outburst", the coal body structure is divided into complete structure, block structure, fragmentation structure, granular structure and surface-structure, the first two are primary structure coal; The latter three are structural coal. Taking the typical mine of Jincheng mining area in the south of Qinshui Basin as an example, the logging response characteristics of different coal body structures are analyzed. It is found that with the increase of coal fragmentation degree, well diameter, acoustic moveout, compensation neutron, Natural potential value and natural gamma response gradually increased, resistivity and density response gradually weakened, natural gamma, natural potential, compensated neutron, well diameter and acoustic wave response of primary structure coal were weaker, resistivity and density response were stronger, Tectonic coal vice versa.
【作者单位】：中国矿业大学(北京)地球科学与测绘工程学院;三峡大学三峡库区地质灾害教育部重点实验室;山西晋城无烟煤矿业集团有限公司国家能源煤与煤层气共采技术重点实验室;
【基金】：国家科技重大专项资助项目(2011ZX05063) 国家自然科学基金资助项目(41372163,41172145) 山西省煤基重点科技攻关资助项目(MQ2014-01,MQ2014-12)
【分类号】：TD713

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