基于速度-深度线性模型的时深转换方法及其在南海海盆深水区的应用
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摘要
介绍了沉积层速度-深度线性模型的原理及其基本特点,利用沿南海海盆深水区一条多道地震剖面解释的速度谱资料,将沉积层速度-深度线性模型应用于该剖面解释数据的时深转换中,建立了与之相关的一整套工作流程,整个流程实现了可视化,并考虑了沉积地层速度的横向变化,为地震剖面的地质解释提供了直观且更为可靠的素材。最后,分别从理论和实践角度分析探讨了该时深转换模型的应用前景和局限性,借此为后续研究工作提供参考。
The theory and basic features of velocity–depth linear model are introduced in this paper.With the velocity spectra data along a multi-channel seismic profile in the deep-water area of the South China Sea and by applying the velocity–depth linear model to the interpreted data of the profile,we obtained direct results for geological interpretation.In addition,through the creation of visual workflow and the consideration of horizontal variation of sedimentary interval velocity within the depth conversion procedures,we made the results of depth conversion more reliable.At the end,we discussed the limitation and further application of velocity–depth linear model in terms of both theory and practice,which would be considered in further work.
The theory and basic features of velocity–depth linear model are introduced in this paper.With the velocity spectra data along a multi-channel seismic profile in the deep-water area of the South China Sea and by applying the velocity–depth linear model to the interpreted data of the profile,we obtained direct results for geological interpretation.In addition,through the creation of visual workflow and the consideration of horizontal variation of sedimentary interval velocity within the depth conversion procedures,we made the results of depth conversion more reliable.At the end,we discussed the limitation and further application of velocity–depth linear model in terms of both theory and practice,which would be considered in further work.
引文
[1]黄春菊,周蒂,陈长民,等.深反射地震剖面所揭示的白云凹陷的深部地壳结构[J].科学通报,2005,50(5):1024-1031.
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[3]王衍棠,陈玲,吴大明.南海中建南盆地速度资料分析与应用[J].热带海洋学报,2006,25(5):49-55.
[4]陆基孟.地震勘探原理及资料解释[M].北京:石油工业出版社,1991:1-240.
[5]SLOTNICK M M.On seismic computations with applications,Ⅰ[J].Geophysics,1936,1(1):9-22.
[6]KAUFMAN H.Velocity functions in seismic prospecting[J].Geophysics,1953,18:289-297.
[7]AL-CHALABI M.Time-depth relationships for multilayer depth conversion[J].Geophysical Prospecting,1997,45:715-720.
[8]MARSDEN D.V0-k method of depth conversion[J].The Leading Edge,1992,11:53-54.
[9]陈美玲.台湾海峡及台湾西部平原之沉积层速度构造[D].台湾:中央大学,2006:1-110.
[10]JAPSEN P.Influence of lithology and Neogene uplift on seismic velocities in Denmark:Implication for depth conversion of maps[J].Amer Assoc Petrol Geol Bull,1993,77(2):192-211.
[11]SMALLWOOD J R.Use of V0-k depth conversion from shelf to deep-water:How deep is that brightspot[J].First Break,2002,20(2):99-107.
[12]ALAMINIOKUMA G I,UGBOR C C.Analytical velocity model for depth conversion in the subsurface facies of Agbada formation in the Niger Delta,Nigeria[J].The Pacific Journal of Science and Technology,2010,11(1):563-575.
[13]谢锐杰,朱广生,刘鹏.VSP时深曲线的向下延伸[J].新疆石油地质,2000,21(6):468-536.
[14]WANG P X,PRELL W L,BLUM P.Leg184Summary:Exploring the Asian monsoon through drilling in the South China Sea[J].Proc.ODP,Initial Reports,2000,184:1-77.
[15]DIX C H.Seismic velocities from surface measurements[J].Geophysics,1955,20:68-86.
[2]汪俊,高红芳,黄永健.基于线性水平连续介质速度模型的南海中央海盆深水区速度分析[J].南海地质研究,2010:67(1)--75.
[3]王衍棠,陈玲,吴大明.南海中建南盆地速度资料分析与应用[J].热带海洋学报,2006,25(5):49-55.
[4]陆基孟.地震勘探原理及资料解释[M].北京:石油工业出版社,1991:1-240.
[5]SLOTNICK M M.On seismic computations with applications,Ⅰ[J].Geophysics,1936,1(1):9-22.
[6]KAUFMAN H.Velocity functions in seismic prospecting[J].Geophysics,1953,18:289-297.
[7]AL-CHALABI M.Time-depth relationships for multilayer depth conversion[J].Geophysical Prospecting,1997,45:715-720.
[8]MARSDEN D.V0-k method of depth conversion[J].The Leading Edge,1992,11:53-54.
[9]陈美玲.台湾海峡及台湾西部平原之沉积层速度构造[D].台湾:中央大学,2006:1-110.
[10]JAPSEN P.Influence of lithology and Neogene uplift on seismic velocities in Denmark:Implication for depth conversion of maps[J].Amer Assoc Petrol Geol Bull,1993,77(2):192-211.
[11]SMALLWOOD J R.Use of V0-k depth conversion from shelf to deep-water:How deep is that brightspot[J].First Break,2002,20(2):99-107.
[12]ALAMINIOKUMA G I,UGBOR C C.Analytical velocity model for depth conversion in the subsurface facies of Agbada formation in the Niger Delta,Nigeria[J].The Pacific Journal of Science and Technology,2010,11(1):563-575.
[13]谢锐杰,朱广生,刘鹏.VSP时深曲线的向下延伸[J].新疆石油地质,2000,21(6):468-536.
[14]WANG P X,PRELL W L,BLUM P.Leg184Summary:Exploring the Asian monsoon through drilling in the South China Sea[J].Proc.ODP,Initial Reports,2000,184:1-77.
[15]DIX C H.Seismic velocities from surface measurements[J].Geophysics,1955,20:68-86.
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