韩城地区煤体结构判识方法及分布规律研究

发布时间：2018-01-23 11:47

本文关键词： 韩城地区煤体结构分布规律测井响应煤体结构指数N和RLLD/RMSFL　出处：《太原理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：韩城地区煤层结构破坏严重，煤体结构复杂，目前区内煤体结构的分布规律研究尚且不足，不能满足煤层气选区及开发评价工作的要求。本次研究基于韩城地区测井资料与煤芯样品对比分析，采用灰分与自然伽马正相关归位法，对韩城地区的煤芯进行了归位。用趋势面分析法对测井资料进行了标准化，并研究了不同煤体结构的测井响应特征。研究表明：韩城地区煤层中构造煤测井响应表现为补偿声波大、补偿密度小、井径大等特征，与原生煤存在差异，通过补偿声波、补偿密度、井径三条测井曲线的有效组合可反映并且放大定性判识的特征；同时还发现在构造煤层段，微球形聚焦电阻率测井响应值特别低，，利用深侧向电阻率和微球形聚焦电阻率的组合RLLD/RMSFL能够更好的判识煤体结构。为减小单一判识方法的误差，本文在研究区利用煤体结构指数N和RLLD/RMSFL交汇定量识别构造煤，建立了研究区5、11号煤层煤体结构判识的方法。应用结果表明，利用该方法划分的煤体结构与煤芯划分的结果基本一致，验证了本文利用煤体结构指数N和RLLD/RMSFL划分煤体结构是可行的。进一步通过对研究区110口煤层气井的测井资料的分析，揭示5号和11号煤层煤体结构分布规律及其影响因素。研究表明，5号煤层煤体结构破坏严重，Ⅰ类煤不发育，仅在研究区中北部区的东部以及南部区的东部地区少量发育；11号煤层煤体结构相对较好，大部分地区都有Ⅰ类煤分布。研究区的煤体结构分布主要受断裂构造控制，薛峰北逆断裂带煤体结构破坏严重，东泽村正断裂带煤体结构破坏相对较弱，在研究区北中部小背斜带以及研究区南部的小断裂发育区煤体结构也有一定程度的破坏；其次，受顶底板岩石力学性质差异的影响，5号煤层煤体结构的破坏程度比11号煤层煤体结构严重。
[Abstract]:The coal seam structure in Hancheng area is seriously damaged and the coal structure is complex. At present, the research on the distribution law of coal structure is not enough, which can not meet the requirements of coalbed methane selection and development evaluation.
The research on comparison and analysis of logging data and core samples of coal in Hancheng area based on the ash and natural gamma is related to coal core homing method, the Hancheng area has been in place. The standardization of well logging data by using the method of trend surface analysis, and the effects of different coal structure well logging response characteristics. The results show that response performance for large compensated acoustic logging data in Hancheng area of tectonic coal in coal seam, compensation density, hole diameter and other features, there are differences with the original coal, by compensating the acoustic wave, density compensation, effective combination of well logging curve can be the size of three reflects the characteristics and amplification of qualitative identification; it is also found in the construction of coal seams section microspherically focused resistivity logging response value is particularly low, using a combination of RLLD/RMSFL and deep lateral resistivity microspherically focused resistivity can identify the coal structure better. In order to reduce the error identification method of the single sentence, the In the study area using coal structure index N and RLLD/RMSFL intersection quantitative identification method was established to study the structure of coal, District No. 5,11 coal seam structure identification. The application results show that the method of dividing coal structure and coal core division results, verified by the coal structure index and N RLLD/RMSFL classification of coalbody structure is feasible.
Through further analysis of logging data of 110 CBM wells, revealing the No. 5 and No. 11 coal seam of coal structure distribution and its influencing factors. The study shows that the No. 5 coal seam of coal body structure damaged seriously, not only of coal development in the study area in the northern region of the eastern and southern area of the East a small amount of area development; No. 11 coal seam of coal body structure is relatively good, most regions have type coal distribution. Distribution of coal structure in the study area is mainly controlled by faults, Xue North thrust belt of coal structure destruction, destruction of relatively weak coal structure donze village fault zone in the study area, north central small small fault anticline belt and the southern part of the study area has a certain degree of damage zones in coal structure; secondly, affected by the difference of top floor rock mechanics, damage degree of No. 5 coal than No. 11 coal seam of coal body structure It's serious.

【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.11;P631.81

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