膝褶带构造及其地球物理正演
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摘要
通过构建一系列理想的膝褶带地质模型,利用四阶有限差分法单炮记录正演模拟方法,对各类型膝褶带在地震反射剖面上的图像几何学特征进行了正演。正演结果分析表明:1)在地震剖面上,膝褶带变形样式不同于断层构造样式,膝褶带在地震剖面上具有一定宽度,带内地震信息呈低振幅、信息模糊或空白带;2)膝褶带内外角之间的变化,即膝褶带内地层产状的倾角变化,对地震反射信息影响巨大;3)在膝褶带内地层陡立或近于直立的情况下,地震反射界面从膝褶带外向内追踪困难,且发生反射界面信息假象。这些地球物理正演结果为实际地震剖面的构造解释、膝褶与断裂构造的区分提供基本的参考。
Finite-difference method-single-shot record method is applied to forward-model kink-band models.Based on the analysis of forward modeling results and the features of seismic images response to the various kink-band belt models,the conclusions are summarized as follow.1) In the seismic profile,kink-band belt is characterized by the substantial width of low-reflectivity,low-signal-to-noise zone and their sub-parallel edges in cross section,which are different from the features of the fault structure.2) Their orientations at a high angle to layering can impact on the seismic imaging efforts.3) Steeply or nearly vertical dipping bedding in the kink-band belt often misguide the reflection interface tracking by some overvalued and other false information.These results can provide first references for interpretation of the seismic profiles,such as identifying structural type,and distinguishing the fault from the kink-band.
Finite-difference method-single-shot record method is applied to forward-model kink-band models.Based on the analysis of forward modeling results and the features of seismic images response to the various kink-band belt models,the conclusions are summarized as follow.1) In the seismic profile,kink-band belt is characterized by the substantial width of low-reflectivity,low-signal-to-noise zone and their sub-parallel edges in cross section,which are different from the features of the fault structure.2) Their orientations at a high angle to layering can impact on the seismic imaging efforts.3) Steeply or nearly vertical dipping bedding in the kink-band belt often misguide the reflection interface tracking by some overvalued and other false information.These results can provide first references for interpretation of the seismic profiles,such as identifying structural type,and distinguishing the fault from the kink-band.
引文
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[19]Williams P F,Price G P.Origin of kinkbands and shear-band cleavage in shear zones:an experimental study.Journal of Structural Geology,1990,12(2):145-164
[20]Stubley M P.The geometry and kinematics of a suite of conjugate kink bands,southeastern Australia.Journal of Structural Geology,1990,12(8):1019-1031
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[22]Stewart K G,Alvarez W.Mobile-hinge kinking in layered rocks and models.Journal of Structural Geology,1991,13(3):243-259
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[26]Ramsay J G.Shear zone geometry:a review.Journal of Structural Geology,1980,2:83-91
[27]Casas-Sainz A M,Cortés A L M.Sequential limb rotation and kink-band migration recorded by growth strata,Almazán Basin.North Spain.Sedimentary Geology,2002,146:25-45
[28]全裕科,丁文龙,余腾孝,等.塔里木盆地巴楚隆起同岗断裂封闭性综合评价.石油与天然气地质,2008,29(6):769-773
[29]郑亚东,张进江,王新社.实践中发展的最大有效力矩准则.地质力学学报,2009,15(3):209-218
[30]Zheng Yadong,Zhang Jinjiang,Wang Xinshe.The maximum-effective monment criterion developing in practice.Journal of Geomechanics,2009,15(3):209-218
[31]张金海,王卫民,赵连锋,等.傅里叶有限差分法三维波动方程正演模拟.地球物理学报,2007,50(6):1854-1862
[32]张金海,王卫民,赵连锋,等.黏声波介质傅里叶有限差分法正演模拟.石油地球物理勘探,2008,43(2):174-179
[33]Ristow D R.Fourier finite-difference migration.Geophysics,1994,59(12):1882-1893
[2]Zheng Yadong,Wang Tao,Ma Minbo,et al.Maximum effective moment criterion and the origin of low-angle normal faults.Journal of Structural Geology,2004,26(2):271-285
[3]Ardell A J,Christie J M,Tullis J.Dislocation substructures in deformed quartz rocks.Crystal Lattice Defects,1973,4:275-285
[4]Tullis J,Yund R A.Experimental deformation of dry Westerly granite.Journal of Geophysics Research,1977,82(B83):5705-5718
[5]Nishikawa O,Takeshita T.Dynamic analysis and two types of kink bands in quartz veins deformed under subgreenschist conditions.Tectonophysics,1999,301:21-34
[6]Zhang Bo,Zhang Jinjiang,Zhong Dalai.Structure,kinematics and ages of transpression during strain-partitioning in the Chongshan shear zone,western Yunnan,China.Journal of Structural Geology,2010,32(4):445-463
[7]Anderson T B.Kink-bands and related geological structures.Nature,1966,210:1249-1251
[8]Stubley M P.Fault and kink-band relationships at Mystery Bay,Australia.Tectonophysics,1989,158:75-92
[9]Price N J,Cosgrove J W.Analysis of geological structures.Cambridge:Cambridge University Press,1990
[10]Suppe J,Sabat F,Munoz J A,et al.Bed-by-bed fold growth by kink-band migration:Sant Llorenc de Morunys,eastern Pyrenees.Journal of Structural Geology,1997,19:443-461
[11]Yin A,Taylor M H.Mechanics of V-shaped conjugate strike-slip faults and the corresponding continuum mode of continental deformation.Geological Society of America Bulletin,2011:doi:10.1130/B30159.1
[12]郑亚东,王涛,王新社.新世纪构造地质学与力学的新理论:最大有效力矩准则.自然科学进展,2005,15(2):142-148
[13]Camerlo R H,Benson E F.Geometric and seismic interpretation of the Perdido fold belt:northwestern deep-water Gulf of Mexico.The American Associ-ation of Petroleum Geologist,2006,90(3):363-386
[14]张波,李生福,张进江,等.膝褶、膝褶带、共轭膝褶带:一种可能的新型油气构造样式.天然气工业,2010,30(2):32-40
[15]丁道桂,郭彤楼,翟常博,等.鄂西–渝东区膝褶带构造.石油实验地质,2005,279(3):205-210
[16]郑亚东,莫午零,张文涛,等.柴达木盆地油气勘探新思路.石油勘探与开发,2007,34(1):13-18
[17]Zheng Yadong,Zhang Jinjiang,Wang Tao.Puzzles and the maximum-effective-moment(MEM)criterion in structural geology.Journal of Structural Geology,2011:doi:10.1016/j.jsg.2011.06.004
[18]闫淑玉,张进江,张波,等.新疆巴楚地区共轭膝折带的物理模拟研究.大地构造与成矿学,2011,35(1):24-31
[19]Williams P F,Price G P.Origin of kinkbands and shear-band cleavage in shear zones:an experimental study.Journal of Structural Geology,1990,12(2):145-164
[20]Stubley M P.The geometry and kinematics of a suite of conjugate kink bands,southeastern Australia.Journal of Structural Geology,1990,12(8):1019-1031
[21]Weiss L E.Nucleation and growth of kink bands.Tectonophysics,1980,65:1-38
[22]Stewart K G,Alvarez W.Mobile-hinge kinking in layered rocks and models.Journal of Structural Geology,1991,13(3):243-259
[23]Scharer K M,Burbank D W,Chen J,et al.Kinematic models of fluvial terraces over active detachment folds:constrains on the growth mechanism of the Kashi-Atushi fold system,Chinese Tian Shan.Geological Society of America Bulletin,2006,118:1006-1021
[24]Kirschner D L,Teixell A.Three-dimensional geometry of kink bands in slates and its relationship with finite strain.Tectonophysics,1996,262:195-211
[25]Goscombe B D,Findlay R H,McClenaghan M P,et al.Multi-scale kinking in northeast Tasmania:crustal shortening at shallow crustal levels.Journal of Structural Geology,1994,16(8):1077-1092
[26]Ramsay J G.Shear zone geometry:a review.Journal of Structural Geology,1980,2:83-91
[27]Casas-Sainz A M,Cortés A L M.Sequential limb rotation and kink-band migration recorded by growth strata,Almazán Basin.North Spain.Sedimentary Geology,2002,146:25-45
[28]全裕科,丁文龙,余腾孝,等.塔里木盆地巴楚隆起同岗断裂封闭性综合评价.石油与天然气地质,2008,29(6):769-773
[29]郑亚东,张进江,王新社.实践中发展的最大有效力矩准则.地质力学学报,2009,15(3):209-218
[30]Zheng Yadong,Zhang Jinjiang,Wang Xinshe.The maximum-effective monment criterion developing in practice.Journal of Geomechanics,2009,15(3):209-218
[31]张金海,王卫民,赵连锋,等.傅里叶有限差分法三维波动方程正演模拟.地球物理学报,2007,50(6):1854-1862
[32]张金海,王卫民,赵连锋,等.黏声波介质傅里叶有限差分法正演模拟.石油地球物理勘探,2008,43(2):174-179
[33]Ristow D R.Fourier finite-difference migration.Geophysics,1994,59(12):1882-1893
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