利用岩性反演和谱分解技术确定岩浆岩侵入煤层范围
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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.
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.
引文
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[2]许升辉,马劲风.波阻抗反演中多井条件下的子波提取方法[J].地球物理学.2003,18(4):623.
[3]李明,侯连华.岩性地层油气藏地球物理勘探技术与应用[D].北京:石油工业出版社,2005.
[4]刘百红,李建华.测井和地震资料宽带约束反演的应用[J].石油物探.2004,43(1):76.
[5]丁继才,常旭,刘伊克,等.反射地震数据的逐层波形反演[J].地球物理学报,2007,50(2):574.
[6]柏冠军,吴汉宁,赵希刚,等.地震资料预测薄层厚度方法研究与应用[J].地球物理学进展,2006,21(2):554.
[7]李军,郝天珧,赵百民.地震与测井数据综合预测裂缝发育带[J].地球物理学进展,2006,21(1):179.
[8]蔡瑞.谱分解技术在储层预测中的应用.CT理论与应用研究[J].2003,12(2):22.
[9]张进铎,杨平,王云雷.地震信息的谱分解技术及其应用[J].勘探地球物理学进展,2006,29(4):235.
[10]邱宁,何展翔,昌彦君.分析研究基于小波分析与谱分析提高重力异常的分辨能力[J].地球物理学进展,2007,22(1):112.
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