基于叠前波场模拟的合成地震记录层位标定
|
摘要
常规合成地震记录层位标定方法没有考虑多次波和转换波以及处理过程对层位标定的影响。为减小合成地震记录与井旁地震道在波场特征上的差异,提高合成地震记录层位标定的精度,提出基于叠前波场模拟的合成地震记录层位标定方法:首先,利用常规方法进行测井曲线编辑和地震子波提取;第二,利用反射率法模拟井旁共反射点道集;第三,对模拟的共反射点道集进行正常时差校正和叠加;最后,以叠加道作为合成地震记录对地震反射进行层位标定。试验结果表明,此方法改善了合成地震记录与井旁地震道之间在地震反射上的一致性,提高了层位标定的可靠性。
The effects of multiples,converted-waves and the processing procedure on well-ties were not taken into account in conventional well-ties method. In order to decrease the differences of wavefield characteristic between log synthetic seismogram and nearby-well seismic trace,and improve the reliability of well-ties,a new well-ties method based on prestack wavefield simulation was proposed. Firstly,the well log was edited and the wavelet was extracted by conventional method. Secondly,the common-reflection-point gather located at the well was simulated by the reflectivity method. Thirdly,normal time difference correction and stack were applied to the simulated common-reflection-point gather. Finally,the stack trace was used as synthetic seismogram to calibrate the seismic reflections for well-ties. The results show that the consistency of synthetic seismogram and well-nearby traces was improved,and the reliability of well-ties was enhanced by using the new method.
The effects of multiples,converted-waves and the processing procedure on well-ties were not taken into account in conventional well-ties method. In order to decrease the differences of wavefield characteristic between log synthetic seismogram and nearby-well seismic trace,and improve the reliability of well-ties,a new well-ties method based on prestack wavefield simulation was proposed. Firstly,the well log was edited and the wavelet was extracted by conventional method. Secondly,the common-reflection-point gather located at the well was simulated by the reflectivity method. Thirdly,normal time difference correction and stack were applied to the simulated common-reflection-point gather. Finally,the stack trace was used as synthetic seismogram to calibrate the seismic reflections for well-ties. The results show that the consistency of synthetic seismogram and well-nearby traces was improved,and the reliability of well-ties was enhanced by using the new method.
引文
[1]董艳蕾,朱筱敏,曾洪流,等.歧南凹陷地震沉积学研究[J].中国石油大学学报:自然科学版,2008,32(4):8-11.DONG Yan-lei,ZHU Xiao-min,ZENG Hong-liu,et al.Study of seismic sedimentology in Qinan sag[J].Journal of China University of Petroleum(Edition of Natural Sci-ence),2008,32(4):8-11.
[2]李磊,王英民,杨绍国,等.混合地震反演技术及其在东海南部陆架盆地中的应用[J],中国石油大学学报:自然科学版,2007,31(5):29-34.LI Lei,WANG Ying-min,YANG Shao-guo,et al.Ap-plication of hybrid seismic inversion:a case study from the southern shelf basin of east China Sea[J].Journal of China University of Petroleum(Edition of Natural Sci-ence),2007,31(5):29-34.
[3]曾正明.合成地震记录层位标定方法改进[J].石油地球物理勘探,2005,40(5):576-578.ZENG Zheng-ming.Improving horizon-labeling method on seismic synthetic records[J].Oil Geophysical Prospec-ting,2005,40(5):576-578.
[4]陈裕明,李晶,周亚同.合成地震记录的改进方法讨论[J].石油地球物理勘探,2001,36(4):496-498.CHEN Yu-ming,LI Jing,ZHOU Ya-tong.A discussion on method for improving synthetic seismogram[J].Oil Geophysical Prospecting,2001,36(4):496-498.
[5]靳玲,苏桂芝,刘桂兰,等.合成地震记录制作的影响因素及对策[J],石油物探,2004,43(3):267-271.JIN Ling,SU Gui-zhi,LIU Gui-lan,et al.Influencing factors in making synthetic seismogram and counter meas-ures[J].Geophysical Prospecting for Petroleum,2004,43(3):267-271.
[6]李国发,廖前进,王尚旭.合成地震记录层位标定若干问题的探讨[J].石油物探,2008,47(2):145-149.LI Guo-fa,LIAO Qian-jin,WANG Shang-xu.Discus-sions about horizon calibration based on synthetic seismo-gram[J].Geophysical Prospecting for Petroleum,2008,47(2):145-149.
[7]陈广军.合成地震记录制作与标定中的争论及注意的问题[J].西安石油学院学报:自然科学版,2002,17(4):19-23.CHEN Guang-jun.Some controversial issues and matters needing attention to in the process of producting and cali-brating synthetic seismogram[J].Journal of Xi an Petro-leum Institute(Natural Science Edition),2002,17(4):19-23.
[8]WHITE R E.How accurate an a well tie be?[J].The Leading Edge,1998,17(8):1065-1071.
[9]HENRY S.Pitfalls in synthetics[J].The Leading Edge,2000,19(6):604-606.
[10]印兴耀,赵剑,张繁昌,等.面波叠前地震记录的合成方法[J].中国石油大学学报:自然科学版,2006,30(1):26-31.YIN Xing-yao,ZHAO Jian,ZHANG Fan-chang,et al.Method of generating prestack synthetic seismograms of spherical wave[J].Journal of China University of Petro-leum(Edition of Natural Science),2006,30(1):26-31.
[11]KENNETTB LN.Seismic wave propagation in stratified media[M].Cambridge:Cambridge University Press,1983.
[12]寻浩,董敏煜,牟永光.各向异性介质中反射率法波场模拟及体波辐射图案[J].石油地球物理勘探,1997,32(5):605-614.XUN Hao,DONG Min-yu,MOU Yong-guang.Wave field simulation using reflectivity method and body-wave radiation patterns in anisotropic media[J].Oil Geo-Physical Prospecting,1997,32(5):605-614.
[2]李磊,王英民,杨绍国,等.混合地震反演技术及其在东海南部陆架盆地中的应用[J],中国石油大学学报:自然科学版,2007,31(5):29-34.LI Lei,WANG Ying-min,YANG Shao-guo,et al.Ap-plication of hybrid seismic inversion:a case study from the southern shelf basin of east China Sea[J].Journal of China University of Petroleum(Edition of Natural Sci-ence),2007,31(5):29-34.
[3]曾正明.合成地震记录层位标定方法改进[J].石油地球物理勘探,2005,40(5):576-578.ZENG Zheng-ming.Improving horizon-labeling method on seismic synthetic records[J].Oil Geophysical Prospec-ting,2005,40(5):576-578.
[4]陈裕明,李晶,周亚同.合成地震记录的改进方法讨论[J].石油地球物理勘探,2001,36(4):496-498.CHEN Yu-ming,LI Jing,ZHOU Ya-tong.A discussion on method for improving synthetic seismogram[J].Oil Geophysical Prospecting,2001,36(4):496-498.
[5]靳玲,苏桂芝,刘桂兰,等.合成地震记录制作的影响因素及对策[J],石油物探,2004,43(3):267-271.JIN Ling,SU Gui-zhi,LIU Gui-lan,et al.Influencing factors in making synthetic seismogram and counter meas-ures[J].Geophysical Prospecting for Petroleum,2004,43(3):267-271.
[6]李国发,廖前进,王尚旭.合成地震记录层位标定若干问题的探讨[J].石油物探,2008,47(2):145-149.LI Guo-fa,LIAO Qian-jin,WANG Shang-xu.Discus-sions about horizon calibration based on synthetic seismo-gram[J].Geophysical Prospecting for Petroleum,2008,47(2):145-149.
[7]陈广军.合成地震记录制作与标定中的争论及注意的问题[J].西安石油学院学报:自然科学版,2002,17(4):19-23.CHEN Guang-jun.Some controversial issues and matters needing attention to in the process of producting and cali-brating synthetic seismogram[J].Journal of Xi an Petro-leum Institute(Natural Science Edition),2002,17(4):19-23.
[8]WHITE R E.How accurate an a well tie be?[J].The Leading Edge,1998,17(8):1065-1071.
[9]HENRY S.Pitfalls in synthetics[J].The Leading Edge,2000,19(6):604-606.
[10]印兴耀,赵剑,张繁昌,等.面波叠前地震记录的合成方法[J].中国石油大学学报:自然科学版,2006,30(1):26-31.YIN Xing-yao,ZHAO Jian,ZHANG Fan-chang,et al.Method of generating prestack synthetic seismograms of spherical wave[J].Journal of China University of Petro-leum(Edition of Natural Science),2006,30(1):26-31.
[11]KENNETTB LN.Seismic wave propagation in stratified media[M].Cambridge:Cambridge University Press,1983.
[12]寻浩,董敏煜,牟永光.各向异性介质中反射率法波场模拟及体波辐射图案[J].石油地球物理勘探,1997,32(5):605-614.XUN Hao,DONG Min-yu,MOU Yong-guang.Wave field simulation using reflectivity method and body-wave radiation patterns in anisotropic media[J].Oil Geo-Physical Prospecting,1997,32(5):605-614.
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