【摘要】 基于鱼卡煤田东部大量勘探和开采资料,采用地球物理测井中自然伽马、密度、声波时差和电阻率测井划分煤体结构的方法,对鱼卡煤田东部ZK0-4井下含煤段M7煤层进行了煤体结构的识别。结果表明,根据不同煤体结构曲线形态及异常幅值的范围识别出ZK0-4井四段煤层的不同煤体结构:745~746 m段上部0.6 m为原生结构煤,下部0.4 m为夹矸;748~749.5 m段中间夹杂0.5 m泥岩,其余均为碎裂煤;752.5~753.5 m段为粉煤;758~761 m段上下各有1 m碎裂煤,中间为原生结构煤分布少量夹矸。由此判定该井周围M7煤层煤体结构以碎裂煤-粉煤为主,后期煤层气生产井位设计应避开该区域,寻找煤体结构较完整的高渗区域。更多还原

【Abstract】 Based on the eastern Yuqia coalfield exploration and production data,using natural gamma ray,density and acoustic time difference and resistivity logging method of identification coal structure to identify the coal structure of ZK0-4 well’s low coal-bearing section M7 coal seam. Results show that according to the different coal structure curve shape and the abnormal amplitude scope,we identify the different coal structures of ZK0-4well’s four coal section,the upper 0.6 m of 745 ~746 m is primary structure coal,the lower 0.4 m is parting,748~749.5 m is cataclastic coal with 0.5 m mudstone in the middle,752.5~753.5 m is pulverized coal,758 ~761 m have1m cataclastic coal on the top and bottom,the middle part is primary structure coal with few parting. It is concluded that the coal structure of M7 coal seam around ZK0-4well are mainly cataclastic coal-pulverized coal,in the late period of coalbed methane production well location design should avoid these area to find the highpermeability area with more steadier coal structure.更多还原