Abstract:In complicated areas,the near-surface velocity model based on the firstbreak tomography inversion lacks extremely low velocity information due to limits of data acquisition,and long wavelength statics cannot be completely solved.Therefore,we propose a near-surface velocity tomographic inversion with a joint stepped-constraint of uphole and firstbreak information.First an accurate velocity v0 of low velocity zone is inverted with uphole data and near-offset firstbreaks.Then taking the velocity v0 as a constraint,the accurate velocity v0 of low-velocity,and the accurate velocity v1 of sub-low-velocity zones can be obtained with inversion by uphole data and mid-offset and far-offset firstbreaks.In this way,weight coefficients are obtained by the adaptive algorithm.The proposed approach is applied to 3D seismic data in Well Da 10 area,Junggar Basin.The results show that long-wavelength statics are solved and the near-surface velocity model is greatly improved.
吴琳,帕提幔,薛慧.静校正对低幅度构造资料处理的影响[J].石油地球物理勘探,2008,43(增刊1):24-28.WU Lin,PA Timan,XUE Hui.Influence of static corrections on low-amplitude structure[J].Oil Geophysical Prospecting,2008,43(S1):24-28.
[2]
刘全新,李道善.关于山地静校正和偏移基准面的一些认识[J].天然气地球科学,2003,14(1):61-63.LIU Quanxin,LI Daoshan.Points about land static correction and migration datum[J].Natural Gas Geoscience,2003,14(1):61-63.
[3]
魏庚雨,李振勇,薛慧.利用地震属性求取剩余静校正的方法[J].石油地球物理勘探,2009,44(增刊1):10-12.WEI Gengyu,LI Zhenyong,XUE Hui.Application of seismic attributes in residual static correction[J].Oil Geophysical Prospecting,2009,44(S1):10-12.
王伟,廖大香,杜宏筠,等.层析静校正在泽口地区地震资料处理中的应用[J].石油天然气学报,2007,29(3):227-228.WANG Wei,LIAO Daxiang,DU Hongjun,et al.Application of tomographic static correction of seismic data process in Zekou area[J].Journal of Oil and Gas Technology,2007,29(3):227-228.
[8]
冯泽元,李培明,唐海忠,等.利用层析反演技术解决山地复杂区静校正问题[J].石油物探,2005,41(3):284-287.FENG Zeyuan,LI Peiming,TANG Haizhong,et al.Solving the static correction problem in mountain complex block using tomographic inversion[J].Geophysical Prospecting for Petroleum,2005,41(3):284-287.
[9]
王西文,徐凤银,冯云发,等.三湖地区地震资料处理中的静校正方法研究[J].石油地球物理勘探,2007,42(5):572-580.WANG Xiwen,XU Fengyin,FENG Yunfa,et al.Study on static corrections of seismic data processing in Sanhu area[J].Oil Geophysical Prospecting,2007,42(5):572-580.
[10]
何光明,贺振华,黄德济,等.非线性层析静校正在川西地区资料处理中的应用[J].石油物探,2006,45(1):88-92.HE Guangming,HE Zhenhua,HUANG Deji,et al.The application of nonlinear tomography statics in Chuanxi data processing[J].Geophysical Prospecting for Petroleum,2006,45(1):88-92.
[11]
樊满仓.层析静校正在黄土塬地区的应用[J].石油地球物理勘探,2008,43(增刊1):36-38.FAN Mancang.Application of tomographic static correction in loess plateau area[J].Oil Geophysical Prospecting,2008,43(S1):36-38.
[12]
王孝,禄娟,冯心远,等.先验信息约束层析成像静校正技术在柴西南地区的应用[J].石油物探,2010,49(1):30-33.WANG Xiao,LU Juan,FENG Xinyuan,et al.Application of priori information constraint tomography static correction technique in the south of Western Qaidam basin[J].Geophysical.Prospecting for Petrolum,2010,49(1):30-33.
[13]
李录明,罗省贤.复杂三维表层模型层析反演与静校正[J].石油地球物理勘探,2003,38(6):636-641.LI Luming,LUO Xingxian.Tomographic inversion for 3-D complex near-surface model and static correction[J].Oil Geophysical Prospecting,2003,38(6):636-641.
[14]
何光明,贺振华,黄德济,等.几种静校正方法的对比研究[J].物探化探计算技术,2006,28(4):310-314.HE Guangming,HE Zhenhua,HUANG Deji,et al.The comparison of several static's correction methods[J].Computing Techniques for Geophysical and Geochemical Exploration,2006,28(4):310-314.
[15]
王孝,贺振华,王述江,等.多信息约束层析反演静校正技术及其应用[J].天然气地球科学,2010,21(2):316-320.WANG Xiao,HE Zhenhua,WANG Shujiang,et al.Technology of static correction for multi information constrained tomographic inversion and its application[J].Natural Gas Geoscience,2010,21(2):316-320.
[16]
刘振宽,吴永刚,刘英杰.近地表层地震层析成像[J].石油地球物理勘探,1994,29(3):294-301.LIU Zhenkuan,WU Yonggang,LIU Yingjie.The seismic tomography for near surface formation[J].Oil Geophysical Prospecting,1994,29(3):294-301.
[17]
李录明,罗省贤,赵波.初至波表层模型层析反演[J].石油地球物理勘探,2000,35(5):559-564.LI Luming,LUO Xingxian,ZHAO Bo.Tomographicinversion of first break in surface model[J].Oil Geophysical Prospecting,2000,35(5):559-564.
[18]
吴杰,苏勤,王建华.层析静校正技术在柴北缘地区的应用[J].岩性油气藏,2008,20(3):79-82.WU Jie,SU Qin,WANG Jianhua.Application of tomographic static correction in northern margin of Qaidam Basin[J].Lithologic Reservoirs,2008,20(3):79-82.
[19]
胡自多,贺振华,王西文,等.无射线追踪层析静校正技术在黄土塬区的应用[J].石油地球物理勘探,2010,45(增刊1):94-100.HU Ziduo,HE Zhenhua,WANG Xiwen,et al.Application of non ray-tracing tomography static correction technique in Loess Plateau[J].Oil Geophysical Pro-specting,2010,45(S1):94-100.