利用零偏VSP资料提高地面地震资料分辨率的方法及其应用研究
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摘要
随着VSP采集技术的改进,零偏VSP资料的质量明显提高。如果仅仅利用零偏VSP资料求取速度或标定层位,则其中所包含的丰富的地震信息不能得到充分利用。提出利用零偏VSP资料获得地层品质因子Q,通过叠前反Q滤波和叠后VSP子波反褶积,对地面地震资料进行频率与能量补偿的方法。实际应用效果表明,该方法能提高三维地震资料的纵向分辨率和油气地震勘探的精度。
Along with the development of VSP acquisition technique,the quality of zero-offset VSP data was obviously improved.If we only utilized zero-offset VSP for velocity computation or horizon calibration, the abundant seismic information contained in the data cannot be sufficiently used.Therefore,we proposed adopting the information of zero-offset VSP data to acquire the Q-value of formation,by prestack inverse Q filtering and poststack VSP wavelet deconvolution, the frequency and energy of surface seismic data are compensated. Actual data application result shows that the method can improve the longitudinal resolution of 3D seismic data and the accuracy of hydrocarbon seismic exploration.
Along with the development of VSP acquisition technique,the quality of zero-offset VSP data was obviously improved.If we only utilized zero-offset VSP for velocity computation or horizon calibration, the abundant seismic information contained in the data cannot be sufficiently used.Therefore,we proposed adopting the information of zero-offset VSP data to acquire the Q-value of formation,by prestack inverse Q filtering and poststack VSP wavelet deconvolution, the frequency and energy of surface seismic data are compensated. Actual data application result shows that the method can improve the longitudinal resolution of 3D seismic data and the accuracy of hydrocarbon seismic exploration.
引文
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[2]何惺华.垂直地震剖面法的试验及成果[J].石油地球物理勘探,1985,20(3):253-264
[3]Tonn R.The determination of seismic quality factor Q from VSP data:a comparison of different eompu- tational methods[J].Geophysical Prospecting,1991, 39(1):1-27
[4]王珺.用稳定高效的反Q滤波技术提高地震资料分辨率[J].地球物理学进展,2008,23(2):456-463
[5]凌云,孙祥娥,高军,等.零井源距VSP上行波统计反褶积方法研究[J].石油物探,2009,48(2): 125-140
[6]何惺华.利用子波置换法提高地面地震资料的分辨率[J].油气地球物理,2008,6(4):15-19
[7]Chopra S.Enhancing seismic frequency bandwidth using VSPs - a case study[J].Oil & Gas Journal, 2003,101(1):38-43
[2]何惺华.垂直地震剖面法的试验及成果[J].石油地球物理勘探,1985,20(3):253-264
[3]Tonn R.The determination of seismic quality factor Q from VSP data:a comparison of different eompu- tational methods[J].Geophysical Prospecting,1991, 39(1):1-27
[4]王珺.用稳定高效的反Q滤波技术提高地震资料分辨率[J].地球物理学进展,2008,23(2):456-463
[5]凌云,孙祥娥,高军,等.零井源距VSP上行波统计反褶积方法研究[J].石油物探,2009,48(2): 125-140
[6]何惺华.利用子波置换法提高地面地震资料的分辨率[J].油气地球物理,2008,6(4):15-19
[7]Chopra S.Enhancing seismic frequency bandwidth using VSPs - a case study[J].Oil & Gas Journal, 2003,101(1):38-43
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