GBM叠前深度偏移在旅大A构造成像中的应用
|
摘要
位于郯庐走滑断层下降盘的旅大A构造由于受到多种构造运动影响,导致断面附近地层偏移归位困难,普通叠前时间偏移处理及叠前深度偏移处理结果不能满足勘探工作的需要,因此选用高斯射线束(GBM)叠前深度偏移方法对本构造进行叠前深度偏移处理。本文在确定了射线束偏移原理在高陡地层处理方面优势基础上,从去噪声,去多次波,各向异性速度场建模等三个主要步骤说明了该方法针对本构造的有效性。通过处理结果与叠前时间偏移、克希霍夫叠前深度偏移处理结果剖面对比,GBM法叠前深度偏移使大断层断面归位清晰,地震轴连续性提高,多次波得到有效抑制。验证了GBM法叠前深度偏移在偏移成像处理方法中的优势,为采用该方法处理具有相似特征的构造提供了参考依据。
Located at thrownside of Tan-lu strike slip fault,the imaging of Lyuda A structure’s stratum is always the hard work as multiple impacts of tectonic movement,traditional PSTM and PSDM can’t satisfy the exploration need as the structure joining with liao dong salient of high-steep which makes the seismic data migration more complex,so GBM(Gaussian beam migration),a new method of beam migration,for its high quality on the seismic imaging aspect is imported to processing this block.As a new migration method,it has the advantage on processing high-steep horizon;this article elaborates three key steps of GBM migration flow:multi-time waves removed,anisotropy velocity field model established,amplitude-preserved etc.With the contrast of the profiles of the traditional PSTM&PSDM,GBM migration method performances better on improving S/N of seismic profile,enhancing seismic axis continuity,making cross section more clearly,and pressing the multi-time waves etc,also the result can be a proof of the good performance on the similar structures sharing the same feature by using the method in this structure.
Located at thrownside of Tan-lu strike slip fault,the imaging of Lyuda A structure’s stratum is always the hard work as multiple impacts of tectonic movement,traditional PSTM and PSDM can’t satisfy the exploration need as the structure joining with liao dong salient of high-steep which makes the seismic data migration more complex,so GBM(Gaussian beam migration),a new method of beam migration,for its high quality on the seismic imaging aspect is imported to processing this block.As a new migration method,it has the advantage on processing high-steep horizon;this article elaborates three key steps of GBM migration flow:multi-time waves removed,anisotropy velocity field model established,amplitude-preserved etc.With the contrast of the profiles of the traditional PSTM&PSDM,GBM migration method performances better on improving S/N of seismic profile,enhancing seismic axis continuity,making cross section more clearly,and pressing the multi-time waves etc,also the result can be a proof of the good performance on the similar structures sharing the same feature by using the method in this structure.
引文
[1]王喜双,梁奇,徐凌,等.叠前深度偏移技术应用与进展[J].地球物理学报,2007,42(6):727～732.
[2]刘素芹,何旭莉,何潮观,等.叠前深度偏移及应用研究[J].西南石油大学学报(自然科学版),2009,31(4):35～37.
[3]赵改善.叠前深度偏移成像技术[J].石油物探译丛,1998(4):1～9.
[4]李来林,吴清岭,何玉钱,等.叠前深度成像技术分析及应用[J].石油地球物理勘探,2005,40(4):407～410.
[5]Ting C O,Wang D L.Controlled Beam Migration–Application in Gulf of Mexico[J].11th InternationalCongress of the Brazilian Geophysical Society,2009:1～4.
[6]许自强,方中于,万欢,等.叠前深度偏移在深水崎岖海底地震资料的应用[J].工程地球物理学报,2011,8(5):572～578.
[7]杨长春,刘兴财,李幼铭,等.地震叠前深度偏移方法流程及应用[J].地球物理学报,1996,39(3):409～414.
[8]胡德胜,佟殿君,阳怀忠.走滑构造研究进展[J].断块油气田,2009,16(5):27～30.
[9]Vinje V,Roberts G,Taylor R,et al.Controlledbeam migration:a versatile structural imaging tool[J].First Break,2008,29(26):109～113.
[10]Gray S,Notfors C,Bleistein N,et al.Imaging u-sing multi-arrivals:Gaussian beams or multi-arri-val Kirchhoff[J].SEG 72th International Meeting,2002,21(1):1117～1120.
[11]Hill R.Prestack Gaussian beam depth migration[J].Geophysics,2001,66(4):1240～1250.
[12]段文胜,邓建峰,黄录忠,等.Omega系统巨浪噪声衰减及逐点速度分析技术的应用[J].新疆石油地质,2007,28(2):226～228.
[13]黄兆林.SRME与Radon滤波方法组合衰减深水多次波[J].工程地球物理学报,2011,8(6):660～665.
[14]Verschuur.地震多次波去除技术的过去现在和未来[M].陈浩林,张保庆,刘军,等译.北京:石油工业出版社,2010.71～89.
[15]Ismail.τ—p域中地震模型解释的若干问题[J].李学清译.世界地震译丛,1994,(3):76～82.
[16]潘宏勋,方伍宝.速度模型误差给叠前深度偏移成像带来的假象[J].物探化探计算技术,2010,32(1):64～67.
[17]井西利,杨长春,李幼铭.建立速度模型的层析成像方法研究[J].石油物探,2002,41(1):41～43.
[18]Alkhalifah T.Gaussian beam depth migration foranisotropic media[J],Geophysics,1995,60(5):1474～1484.
[2]刘素芹,何旭莉,何潮观,等.叠前深度偏移及应用研究[J].西南石油大学学报(自然科学版),2009,31(4):35～37.
[3]赵改善.叠前深度偏移成像技术[J].石油物探译丛,1998(4):1～9.
[4]李来林,吴清岭,何玉钱,等.叠前深度成像技术分析及应用[J].石油地球物理勘探,2005,40(4):407～410.
[5]Ting C O,Wang D L.Controlled Beam Migration–Application in Gulf of Mexico[J].11th InternationalCongress of the Brazilian Geophysical Society,2009:1～4.
[6]许自强,方中于,万欢,等.叠前深度偏移在深水崎岖海底地震资料的应用[J].工程地球物理学报,2011,8(5):572～578.
[7]杨长春,刘兴财,李幼铭,等.地震叠前深度偏移方法流程及应用[J].地球物理学报,1996,39(3):409～414.
[8]胡德胜,佟殿君,阳怀忠.走滑构造研究进展[J].断块油气田,2009,16(5):27～30.
[9]Vinje V,Roberts G,Taylor R,et al.Controlledbeam migration:a versatile structural imaging tool[J].First Break,2008,29(26):109～113.
[10]Gray S,Notfors C,Bleistein N,et al.Imaging u-sing multi-arrivals:Gaussian beams or multi-arri-val Kirchhoff[J].SEG 72th International Meeting,2002,21(1):1117～1120.
[11]Hill R.Prestack Gaussian beam depth migration[J].Geophysics,2001,66(4):1240～1250.
[12]段文胜,邓建峰,黄录忠,等.Omega系统巨浪噪声衰减及逐点速度分析技术的应用[J].新疆石油地质,2007,28(2):226～228.
[13]黄兆林.SRME与Radon滤波方法组合衰减深水多次波[J].工程地球物理学报,2011,8(6):660～665.
[14]Verschuur.地震多次波去除技术的过去现在和未来[M].陈浩林,张保庆,刘军,等译.北京:石油工业出版社,2010.71～89.
[15]Ismail.τ—p域中地震模型解释的若干问题[J].李学清译.世界地震译丛,1994,(3):76～82.
[16]潘宏勋,方伍宝.速度模型误差给叠前深度偏移成像带来的假象[J].物探化探计算技术,2010,32(1):64～67.
[17]井西利,杨长春,李幼铭.建立速度模型的层析成像方法研究[J].石油物探,2002,41(1):41～43.
[18]Alkhalifah T.Gaussian beam depth migration foranisotropic media[J],Geophysics,1995,60(5):1474～1484.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心