一种新的TTI介质多参数联合层析反演方法
|
摘要
倾斜横向各向同性(TTI)介质具有构造复杂、速度和各向异性参数的数量级差距大、对旅行时同时产生影响等特性,因而层析反演时不稳定且存在多解性。常规的单参数顺序反演方法计算量大,存在误差累积现象,难以建立准确的速度和各向异性参数模型。在常规TTI介质层析反演的基础上,采用理论公式将数量级相差巨大的Thomsen参数转换为数量级一致的速度参数,实现了等效参数同时反演。提出了先采用稳定性较高的顺序反演获得一定精度的参数模型,再使用精度较高的同时反演进一步提高模型精度的联合反演策略。SEG标准TTI模型数据试算和实际资料处理结果表明,联合反演策略精度高、稳定性强,具有较强的有效性和实用性,适用于复杂构造地区大规模实际资料的生产应用。
Tilted Transversely Isotropic(TTI) media exhibit structural complexity,and large magnitude differences in the parameters describing anisotropy.This causes incorrect calculations of travel time and then the instability and indeterminateness of the tomographic inversion,due to which the evaluation of velocities and anisotropic parameters by conventional single-parameter sequential inversion methods becomes difficult,as such models require a large computational effort,and suffer from error accumulation.In this work,Thomsen parameters obtained by conventional tomographic inversions in TTI media,which exhibit large differences in magnitude,are converted into velocity parameters having the same order of magnitude through a theoretical formula,so as to realize a simultaneous and equivalent parameter inversion.A joint inversion strategy is then proposed,in which the highly-stable sequential inversion is performed to evaluate the model parameters.Subsequently,the simultaneous inversion is carried out to further improve the model precision.Tests on synthetic and field data demonstrated the high stability and accuracy of the simultaneous in version.Therefore,it is believed that this method has the potential for application in large-scale field data in complex structure areas.
Tilted Transversely Isotropic(TTI) media exhibit structural complexity,and large magnitude differences in the parameters describing anisotropy.This causes incorrect calculations of travel time and then the instability and indeterminateness of the tomographic inversion,due to which the evaluation of velocities and anisotropic parameters by conventional single-parameter sequential inversion methods becomes difficult,as such models require a large computational effort,and suffer from error accumulation.In this work,Thomsen parameters obtained by conventional tomographic inversions in TTI media,which exhibit large differences in magnitude,are converted into velocity parameters having the same order of magnitude through a theoretical formula,so as to realize a simultaneous and equivalent parameter inversion.A joint inversion strategy is then proposed,in which the highly-stable sequential inversion is performed to evaluate the model parameters.Subsequently,the simultaneous inversion is carried out to further improve the model precision.Tests on synthetic and field data demonstrated the high stability and accuracy of the simultaneous in version.Therefore,it is believed that this method has the potential for application in large-scale field data in complex structure areas.
引文
[1] ZHOU H.A reversed VSP tomographic velocity analysis[J].Expanded Abstracts of 70th Annual Internat SEG Mtg,2000:1771-1774
[2] CAI J,WITCOMBE M,WEIGANT J,et al.Depth-velocity model building using multiscale tomography—part 1[J].Expanded Abstracts of 76th Annual Internat SEG Mtg,2006:3359-3363
[3] ZHOU H W.Multiscale traveltime tomography[J].Geophysics,2003,68(5):1639-1649
[4] DIRKS V.Automatic dense and volumetric picking for high resolution 3D tomographic model building[J].Expanded Abstracts of 75th Annual Internat SEG Mtg,2005:2538-2541
[5] ZHOU H B,PHAM D,GRAY S,et al.3-D tomographic velocity analysis in transversely isotropic media[J].Expanded Abstracts of 73rd Annual Internat SEG Mtg,2003:650-654
[6] ZHOU H B,PHAM D,GRAY S,et al.Tomographic velocity analysis in strong anisotropic TTI media[J].Expanded Abstracts of 74th Annual Internat SEG Mtg,2004:2347-2350
[7] YUAN J X,MA X C,LIN S,et al.P-wave tomographic velocity updating in 3D inhomogeneous VTI media[J].Expanded Abstracts of 76th Annual Internat SEG Mtg,2006:3368-3372
[8] WOODWARD M J,NICHOLS D,ZDRAVEVA O.A decade of tomography[J].Geophysics,2008,73(5):VE5-VE11
[9] BAKULIN A,WOODWARD M,OLGA Z,et al.Application of steering filters to localized anisotropic tomography with well data[J].Expanded Abstracts of 80th Annual Internat SEG Mtg,2010:4286-4290
[10] BAKULIN A V,LIU Y,ZDRAVEVA O.Borehole-calibrated and geologically plausible anisotropic models using wells and horizon-guided interpolation[J].Expanded Abstracts of 72nd Annual Internat EAGE Conference and Exhibition,2010:C038
[11] HE Y,CAI J.Anisotropic tomography for TTI and VTI media[J].Expanded Abstracts of 81st Annual Internat SEG Mtg,2011:3923-3927
[12] ZHOU C,JIAO J,LIN S.Multi-parameter joint tomography for anisotropic model building[J].Expanded Abstracts of 73rd Annual Internat EAGE Mtg,2011:P145
[13] 黄光南,ZHOU B,邓居智,等.各向异性TI介质qP反射波走时层析成像[J].地球物理学报,2015,58(6):2035-2045HUANG G N,ZHOU B,DENG J Z,et al.Traveltime tomography of qP reflection waves in anisotropic TI media[J].Chinese Journal of Geophysics,2015,58(6):2035-2045
[14] 蔡俊雄,乐友喜,曾勉.三维VTI介质初至波走时层析速度和各向异性参数建模方法研究[J].天然气地球科学,2017,28(11):1771-1777CAI J X,YUE Y X,ZENG M.Study of first-arrival traveltime tomographic velocity and anisotropy parameters modeling method in 3D VTI media[J].Natural Gas Geoscience,2017,28(11):1771-1777
[15] 刘瑞合,赵金玉,印兴耀,等.VTI介质各向异性参数层析反演策略与应用[J].石油地球物理勘探,2017,52(3):484-490LIU R H,ZHAO J Y,YIN X Y,et al.Strategy of anisotropic parameter tomography inversion in VTI medium[J].Oil Geophysical Prospecting,2017,52(3):484-490
[16] 李辉,王华忠,张兵.层析反演中的正则化方法研究[J].石油物探,2015,54(5):569-581 LI H,WANG H Z,ZHANG B.The study of regularization in tomography[J].Geophysical Prospecting for Petroleum,2015,54(5):569-581
[17] 唐杰,张文征,温雷,等.各向异性HTI介质中的剪张源矩张量特征研究[J].石油物探,2018,57(5):652-657TANG J,ZHANG W Z,WEN L,et al.Characteristics of moment tensor of shear-tensile source in HTI anisotropic media[J].Geophysical Prospecting for Petroleum,2018,57(5):652-657
[18] 张宇.从成像到反演:叠前深度偏移的理论、实践与发展[J].石油物探,2018,57(1):1-23ZHANG Y.From imaging to inversion:Theory,practice,and technological evolution of prestack depth migration[J].Geophysical Prospecting for Petroleum,2018,57(1):1-23
[19] 裴云龙,王立歆,邬达理,等.井控各向异性速度建模技术在YKL地区的应用[J].石油物探,2017,56(3):390-399PEI Y L,WANG L X,WU D L,et al.The application of well-controlled anisotropy velocity modeling in YKL region[J].Geophysical Prospecting for Petroleum,2017,56(3):390-399
[20] 李源,刘伟,刘微,等.各向异性全速度建模技术在山地地震成像中的应用[J].石油物探,2015,54(2):157-164LI Y,LIU W,LIU W,et al.Application of anisotropic full velocity modeling in the mountainous seismic imaging[J].Geophysical Prospecting for Petroleum,2015,54(2):157-164
[21] ALKHALIFAH T.An acoustic wave equation for anisotropic media[J].Geophysics,2000,65(4):1239-1250
[22] 吴国忱,梁锴,戚艳平.三维TTI介质相速度和群速度[J].地球物理学进展,2009,24(6):2097-2105WU G C,LIANG K,QI Y P.Phase velocity and group velocity in 3D TTI media[J].Progress in Geophysics,2009,24(6):2097-2105
[2] CAI J,WITCOMBE M,WEIGANT J,et al.Depth-velocity model building using multiscale tomography—part 1[J].Expanded Abstracts of 76th Annual Internat SEG Mtg,2006:3359-3363
[3] ZHOU H W.Multiscale traveltime tomography[J].Geophysics,2003,68(5):1639-1649
[4] DIRKS V.Automatic dense and volumetric picking for high resolution 3D tomographic model building[J].Expanded Abstracts of 75th Annual Internat SEG Mtg,2005:2538-2541
[5] ZHOU H B,PHAM D,GRAY S,et al.3-D tomographic velocity analysis in transversely isotropic media[J].Expanded Abstracts of 73rd Annual Internat SEG Mtg,2003:650-654
[6] ZHOU H B,PHAM D,GRAY S,et al.Tomographic velocity analysis in strong anisotropic TTI media[J].Expanded Abstracts of 74th Annual Internat SEG Mtg,2004:2347-2350
[7] YUAN J X,MA X C,LIN S,et al.P-wave tomographic velocity updating in 3D inhomogeneous VTI media[J].Expanded Abstracts of 76th Annual Internat SEG Mtg,2006:3368-3372
[8] WOODWARD M J,NICHOLS D,ZDRAVEVA O.A decade of tomography[J].Geophysics,2008,73(5):VE5-VE11
[9] BAKULIN A,WOODWARD M,OLGA Z,et al.Application of steering filters to localized anisotropic tomography with well data[J].Expanded Abstracts of 80th Annual Internat SEG Mtg,2010:4286-4290
[10] BAKULIN A V,LIU Y,ZDRAVEVA O.Borehole-calibrated and geologically plausible anisotropic models using wells and horizon-guided interpolation[J].Expanded Abstracts of 72nd Annual Internat EAGE Conference and Exhibition,2010:C038
[11] HE Y,CAI J.Anisotropic tomography for TTI and VTI media[J].Expanded Abstracts of 81st Annual Internat SEG Mtg,2011:3923-3927
[12] ZHOU C,JIAO J,LIN S.Multi-parameter joint tomography for anisotropic model building[J].Expanded Abstracts of 73rd Annual Internat EAGE Mtg,2011:P145
[13] 黄光南,ZHOU B,邓居智,等.各向异性TI介质qP反射波走时层析成像[J].地球物理学报,2015,58(6):2035-2045HUANG G N,ZHOU B,DENG J Z,et al.Traveltime tomography of qP reflection waves in anisotropic TI media[J].Chinese Journal of Geophysics,2015,58(6):2035-2045
[14] 蔡俊雄,乐友喜,曾勉.三维VTI介质初至波走时层析速度和各向异性参数建模方法研究[J].天然气地球科学,2017,28(11):1771-1777CAI J X,YUE Y X,ZENG M.Study of first-arrival traveltime tomographic velocity and anisotropy parameters modeling method in 3D VTI media[J].Natural Gas Geoscience,2017,28(11):1771-1777
[15] 刘瑞合,赵金玉,印兴耀,等.VTI介质各向异性参数层析反演策略与应用[J].石油地球物理勘探,2017,52(3):484-490LIU R H,ZHAO J Y,YIN X Y,et al.Strategy of anisotropic parameter tomography inversion in VTI medium[J].Oil Geophysical Prospecting,2017,52(3):484-490
[16] 李辉,王华忠,张兵.层析反演中的正则化方法研究[J].石油物探,2015,54(5):569-581 LI H,WANG H Z,ZHANG B.The study of regularization in tomography[J].Geophysical Prospecting for Petroleum,2015,54(5):569-581
[17] 唐杰,张文征,温雷,等.各向异性HTI介质中的剪张源矩张量特征研究[J].石油物探,2018,57(5):652-657TANG J,ZHANG W Z,WEN L,et al.Characteristics of moment tensor of shear-tensile source in HTI anisotropic media[J].Geophysical Prospecting for Petroleum,2018,57(5):652-657
[18] 张宇.从成像到反演:叠前深度偏移的理论、实践与发展[J].石油物探,2018,57(1):1-23ZHANG Y.From imaging to inversion:Theory,practice,and technological evolution of prestack depth migration[J].Geophysical Prospecting for Petroleum,2018,57(1):1-23
[19] 裴云龙,王立歆,邬达理,等.井控各向异性速度建模技术在YKL地区的应用[J].石油物探,2017,56(3):390-399PEI Y L,WANG L X,WU D L,et al.The application of well-controlled anisotropy velocity modeling in YKL region[J].Geophysical Prospecting for Petroleum,2017,56(3):390-399
[20] 李源,刘伟,刘微,等.各向异性全速度建模技术在山地地震成像中的应用[J].石油物探,2015,54(2):157-164LI Y,LIU W,LIU W,et al.Application of anisotropic full velocity modeling in the mountainous seismic imaging[J].Geophysical Prospecting for Petroleum,2015,54(2):157-164
[21] ALKHALIFAH T.An acoustic wave equation for anisotropic media[J].Geophysics,2000,65(4):1239-1250
[22] 吴国忱,梁锴,戚艳平.三维TTI介质相速度和群速度[J].地球物理学进展,2009,24(6):2097-2105WU G C,LIANG K,QI Y P.Phase velocity and group velocity in 3D TTI media[J].Progress in Geophysics,2009,24(6):2097-2105