利用地震反演信息划分煤体结构
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摘要
基于不同煤体结构的物理性质不同,利用叠前地震反演信息得到的多种弹性参数可以进行煤体结构的划分,从而确定煤层裂隙发育带。介绍了同步反演的理论基础和实现过程,对同步反演结果进行了初步分析,并通过LMR变换获得2个岩性指示因子LR与MR,利用二者的交汇图划分煤体结构,进而预测了淮南张集煤矿西三采区煤层裂隙发育区域。这种基于叠前资料的反演分析方法,能有效地利用以往被忽略的叠前地震信息,显著提高岩性解释水平。
Based on the discrepancies in characters of different coal structures,the coal fractured zones are able to be determined by classifying different structural coal using the elastic parameters derived from the pre-seismic inversion.This paper introduced the theoretical basis and realization of the simultaneous inversion.Then,some primary analysis were conducted on the simultaneous inversion results,in which two lithological factors LR and MR have been obtained through LMR transform.By making use of the cross-plot of these two factors in analyzing the coal structures,the fractured zones have been delineated in mining district No.3 of Zhangji mine in South Anhui.This inversion analysis method can efficiently exploit the pre-stack information,which is often ignored in the past,significantly elevating the lithological explanation level.
Based on the discrepancies in characters of different coal structures,the coal fractured zones are able to be determined by classifying different structural coal using the elastic parameters derived from the pre-seismic inversion.This paper introduced the theoretical basis and realization of the simultaneous inversion.Then,some primary analysis were conducted on the simultaneous inversion results,in which two lithological factors LR and MR have been obtained through LMR transform.By making use of the cross-plot of these two factors in analyzing the coal structures,the fractured zones have been delineated in mining district No.3 of Zhangji mine in South Anhui.This inversion analysis method can efficiently exploit the pre-stack information,which is often ignored in the past,significantly elevating the lithological explanation level.
引文
[1]张子敏,张玉贵.瓦斯地质规律与瓦斯预测[M].北京:煤炭工业出版社,2005.
[2]张子敏.瓦斯地质规律与地质学[M].徐州:中国矿业大学出版社，2009.
[3]傅雪海,姜波,秦勇,等.用测井曲线划分煤体结构和预测煤储层渗透率[J].测井技术,2003,27(2):140-143.
[4]傅雪海,秦勇.多相介质煤层气储层渗透率预测理论与方法[M].徐州:中国矿业大学出版社,2003.
[5]彭苏萍,高云峰,杨瑞召,等.AVO探测煤层瓦斯富集的理论探讨和初步实践[J].地球物理学报,2005,48(6):1475-1785.
[6]崔若飞,钱进,陈同俊,等.利用地震P波确定煤层瓦斯富集带的分布[J].煤田地质与勘探,2007,35(6):54-56.
[7]崔若飞,孙学凯,崔大尉.地震反演—煤田地震勘探的新进展[J].中国煤炭地质,2008(6):49-52.
[8] GARDNER HF, GARDNER LW, GREGORY A R. Formation velocity and density-the diagnostic basics for stratigraphic traps[J]. Geophysics,1974,39:770-780.
[9] CASTAGNA J P, BATZLE M L, EASTWOOD R L. Relationships between compressional-wave and shear-wave velocities in elastic silicate rocks[J].Geophysics, 1985, 50:571-581.
[10] AKI K I, RICHARDS P G. Quantitative seismology[M].NewYork: W. H. Freeman and Co,1980.
[2]张子敏.瓦斯地质规律与地质学[M].徐州:中国矿业大学出版社，2009.
[3]傅雪海,姜波,秦勇,等.用测井曲线划分煤体结构和预测煤储层渗透率[J].测井技术,2003,27(2):140-143.
[4]傅雪海,秦勇.多相介质煤层气储层渗透率预测理论与方法[M].徐州:中国矿业大学出版社,2003.
[5]彭苏萍,高云峰,杨瑞召,等.AVO探测煤层瓦斯富集的理论探讨和初步实践[J].地球物理学报,2005,48(6):1475-1785.
[6]崔若飞,钱进,陈同俊,等.利用地震P波确定煤层瓦斯富集带的分布[J].煤田地质与勘探,2007,35(6):54-56.
[7]崔若飞,孙学凯,崔大尉.地震反演—煤田地震勘探的新进展[J].中国煤炭地质,2008(6):49-52.
[8] GARDNER HF, GARDNER LW, GREGORY A R. Formation velocity and density-the diagnostic basics for stratigraphic traps[J]. Geophysics,1974,39:770-780.
[9] CASTAGNA J P, BATZLE M L, EASTWOOD R L. Relationships between compressional-wave and shear-wave velocities in elastic silicate rocks[J].Geophysics, 1985, 50:571-581.
[10] AKI K I, RICHARDS P G. Quantitative seismology[M].NewYork: W. H. Freeman and Co,1980.
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