随钻地震波场空间传播特征研究及应用
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摘要
随钻地震是上世纪90年代初发展起来的新技术,是以钻井过程中钻头的振动作为震源进行地震测量,可实时预测钻头前方地层构造的细节,减少钻探风险。本文从理论和实际资料的处理分析着手,系统研究了随钻地震中的直达波、反射波和其他几种主要干扰波波场的空间传播特性;根据各种波场在不同三维空间传播特性的差异,讨论了干扰波的分离和衰减方法;对实际随钻地震资料进行了去噪处理,取得了较理想的效果。本文的研究成果对随钻地震勘探具有一定的指导意义。
Seismic While Drilling(SWD) is a new technique developed in the 90s of the last century, which taken vibration of drill-bit in drilling process as a seismic source to conduct seismic survey that can make real-time prediction of the detail of formation structure ahead of drill-bit and reduce the risk of drilling. Starting from the theory and real data processing, the paper systematically studied the propagation characteristics of wavefields of direct wave, reflected wave and other major interference waves ; discussed the separation and attenuation methods of interference waves according to difference in 3D spatial propagation characteristics of a variety of wavefields; the noise-eliminated processing of SWD data gained a ideal effects. The studied results of the paper have guiding meaning to SWD exploration.
Seismic While Drilling(SWD) is a new technique developed in the 90s of the last century, which taken vibration of drill-bit in drilling process as a seismic source to conduct seismic survey that can make real-time prediction of the detail of formation structure ahead of drill-bit and reduce the risk of drilling. Starting from the theory and real data processing, the paper systematically studied the propagation characteristics of wavefields of direct wave, reflected wave and other major interference waves ; discussed the separation and attenuation methods of interference waves according to difference in 3D spatial propagation characteristics of a variety of wavefields; the noise-eliminated processing of SWD data gained a ideal effects. The studied results of the paper have guiding meaning to SWD exploration.
引文
[1] Rector Ⅲ J W and Hardage B A. Radiation pattern and seismic waves generated by a working roller-cone drill bit.Geophysics,1992,57:1319-1333
[2] Rector Ⅲ J W and Marion B P. The use of drill-bit energy as a downhole seismic source. Geophysics, 1991, 56:628-634
[3] Haldorsen J B U et al. Walk-away VSP using drill noise as a source.Geophysics, 1995,60:978-997
[4] Poletto F and Dordolo G. A new approach to offshore drill-bit reverse vertical seismic profiling(RVSP). Geophysics, 2002,67:1071-1075
[5] Aleotti L et al.Seismic while-drilling technology:use and analysis of the drill-bit seismic source in a crosshole survey. Geophysical Prospecting, 1999,47:25-39
[6] Batini F et al. Seismic while drilling measurements in Itallian deep geothermal wells. Proceedings World Geothermal Congress,2000
[7] Petronio L and Poletto F. Seismic-while-drilling by using tunnel boring machine noise. Geophysics, 2002, 67: 1798-1809
[8] Petronio L et al. Geology pridiction ahead of the excavation front by Tunnel Seismic while Drilling(TSWD) method. SEG International Exposition and 73rd Annual Meeting, 2003
[9]长春地质学院、成都地质学院、武汉地质学院合编.地 震勘探--原理和方法.北京:地质出版社出版,1980, 96-102
[2] Rector Ⅲ J W and Marion B P. The use of drill-bit energy as a downhole seismic source. Geophysics, 1991, 56:628-634
[3] Haldorsen J B U et al. Walk-away VSP using drill noise as a source.Geophysics, 1995,60:978-997
[4] Poletto F and Dordolo G. A new approach to offshore drill-bit reverse vertical seismic profiling(RVSP). Geophysics, 2002,67:1071-1075
[5] Aleotti L et al.Seismic while-drilling technology:use and analysis of the drill-bit seismic source in a crosshole survey. Geophysical Prospecting, 1999,47:25-39
[6] Batini F et al. Seismic while drilling measurements in Itallian deep geothermal wells. Proceedings World Geothermal Congress,2000
[7] Petronio L and Poletto F. Seismic-while-drilling by using tunnel boring machine noise. Geophysics, 2002, 67: 1798-1809
[8] Petronio L et al. Geology pridiction ahead of the excavation front by Tunnel Seismic while Drilling(TSWD) method. SEG International Exposition and 73rd Annual Meeting, 2003
[9]长春地质学院、成都地质学院、武汉地质学院合编.地 震勘探--原理和方法.北京:地质出版社出版,1980, 96-102
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