| 基于构造定量化研究的煤层气勘探区优选——以大宁—吉县地区为例 |
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| 引用本文： | 朱长生,陈飞,蒋孝文,双燕,李长林.基于构造定量化研究的煤层气勘探区优选——以大宁—吉县地区为例[J].中国煤炭地质,2009(3):28-31. |
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| 作者姓名： | 朱长生 陈飞 蒋孝文 双燕 李长林 |
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| 作者单位： | 重庆地质矿产研究院,重庆400042 |
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| 摘 要： | 大宁-吉县地区位于鄂尔多斯盆地东部晋西挠褶带南段,区内主要发育一系列宽缓褶皱,东部、东南部发育少量断层。野外厚层砂岩节理测量点的观测结果表明,区内盖层砂岩节理发育方向为NE30°、NE60°和NW60°,在北部的午城、窑曲、管头一带节理密度较大。运用分形理论对煤层及盖层砂岩显微裂隙进行分析,区内8煤层显微裂隙比5煤层发育,午城、山中、薛关、水堤所围成的区域以及窑曲-桑娥区块分维值多在0.8以上,为显微裂隙发育区。综合分析认为薛关、午城和桑娥区块是煤层气勘查目标区。
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| 关 键 词： | 节理密度 显微裂隙 分维值 勘查区优选 大宁—吉县 |
CBM Exploration Target Preference Based on Structural Quantitative Study --To Take the Daning-Jixian Area as an Example |
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| Zhu Changsheng,Chen Fei,Jiang Xiaowen,Shuang Yan and Li Changlin.CBM Exploration Target Preference Based on Structural Quantitative Study --To Take the Daning-Jixian Area as an Example[J].Coal Geology of China,2009(3):28-31. |
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| Authors: | Zhu Changsheng Chen Fei Jiang Xiaowen Shuang Yan and Li Changlin |
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| Institution: | (Chongqing Institute of Geology and Mineral Resources, Chongqing 400042) |
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| Abstract: | The Daning-Jixian area is situated in the southern part of the western Shanxi flexural fold zone, eastern Ordos Basin, a series of open folds developed in the area, and a small amount of fanlts developed in eastern and southeastern part. The field observation results of thick bedded sandstone joint measuring points demonstrated that the area＇s capping sandstone joint developing direction is NE30o, NE60o and NW60o, the joint density is higher in Wueheng-Yaoqu-Guantou district in the northern part. Analyzed capping sandstone micro-fractures of coal and capping sandstone through fractal geometry have found that micro-fractures in the No.8 coal seam are more developed than in the No.5 coal seam, fraetal dimension values in the Wucheng, Shanzhong, Xueguan and Shuidi enclosed area and in the Yaoqu-Sange block are mostly above 0.8 and the micro-fracture developed areas. The aggregate analysis has demonstrated that the Xueguan, Wucheng and Sange blocks are ideal CBM exploration target areas. |
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| Keywords: | joint density micro-fracture fractal dimension value exploration area preference |
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