利用岩性反演和谱分解技术确定岩浆岩侵入煤层范围  

DETERMINATION OF MAGNETIC ROCK INTRUSION USING LITHOLOGY INVERSION AND SPECTRAL DECOMPOSITION METHOD

作　　者：李仁海[1] 崔若飞[1] 毛欣荣[1] 

机构地区：[1]中国矿业大学,江苏徐州221008

出　　处：《物探化探计算技术》2008年第2期105-109,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然基金项目资助(40574057);国家重点基础研究发展规划(973)项目资助(2007CB209400)

摘　　要：岩性地震反演技术是根据钻孔测井数据纵向分辨率很高的有利条件,对井旁地震资料进行约束。并在此基础上,对孔间地震资料进行反演,推断煤系地层岩性在平面上的变化情况。谱分解技术是利用薄层调谐体离散频率的特性,通过分析复杂岩层内陷频谱变化和局部相位的不稳定性,识别薄地层横向分布特征。这里根据崔庄煤矿三采区的地震资料,综合利用地震反演技术和谱分解技术等岩性解释方法,来确定岩浆岩侵入煤层的范围。经过实际检验,该方法提高了岩浆岩和煤层边界的分辨能力,较好地解决了岩浆岩侵入煤层的识别问题。The lithology seismic inversion technique can deduce the lithology variation of coal-bearing stratum by inverting the seismic data between the wells with the well logging data of high vertical resolution as constraints. Spectral decomposition technique analyzes the spectral changes of complex stratum and analyzing local phase instability to identify the landscape distributing characters of thin stratum based on the characters of lamella disperse frequency. In this paper, field seismic data of the third excavating area of Cui Zhuang coalmine are dealt with lithology seismic inversion technique and spectral decomposition technique to confirm the area of igneous rock. The results show that this method improves the resolving power of magnetic rock and coal boundary, and outlines the area of magnetic rock intrusion.

关 键 词：岩性 地震反演 谱分解 岩浆岩 

分 类 号：P631.4[天文地球—地质矿产勘探]