百58井区地震数据高分辨率成像与断裂带构造特征
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摘要
准噶尔盆地西北缘百口泉地区百58井区是一个被多条断裂切割的复杂断块区,地层倾角变化大;现有的三维地震资料成果剖面上地震波组连续性差,断裂带附近资料成像模糊,地层接触关系不清楚,很难进行精细构造解释。为获得研究区沉积盖层精细结构,在详细分析原始地震资料特点和存在问题的基础上,有针对性地采用叠前多域去噪和非线性叠前时间偏移等多种处理技术,对已有的三维地震资料进行了高分辨率精细成像处理。新的成果剖面揭示出该区百—乌断裂带发育特征、空间展布及平面组合关系。根据地层厚度、构造特征、地震反射波组特征等,划分该区地层为二叠系、三叠系、侏罗系—白垩系三大构造层,以三大构造层不同的构造特征为依据确定了研究区分为西部推覆构造带、中部断阶构造带和东部斜坡构造带3个构造单元。
Bai-58 well of Baiquan area on the northwestern margin of Junggar basin is a complex fault-block area cut by multiple faults with variable dip of layers and the distribution of multiple faults.The old 3D seismic data section in the Bai-58 well region show the poor continuity of seismic events,poor imaging data near the fault zone,the unclear contact relationship between strata.And it is difficult to explain fine structure.In order to obtain the fine structure of sedimentary in the study area,we use various processing technologies such as pre-stack multi-domian noise attenuation and non-linear pre-stack time migration for doing high-resolution 3D seismic reflection data on base of the analysis of the raw seismic data and problems.New results reveal the development characteristics,spatial distribution patterns and the relationship of surface composition of Bai-Wu fault.According to the section showing the strata thickness,structural feature,and characteristics of the seismic reflection wave group,the study area is divided into the three major structural layers,which are Permian,Triassic,Jurassic-Cretaceous structural layer.The different tectonic feature of the three major structural layer,is divided the study area into the western thrust belt,central fault-step zone,and eastern slope tectonic zone.
Bai-58 well of Baiquan area on the northwestern margin of Junggar basin is a complex fault-block area cut by multiple faults with variable dip of layers and the distribution of multiple faults.The old 3D seismic data section in the Bai-58 well region show the poor continuity of seismic events,poor imaging data near the fault zone,the unclear contact relationship between strata.And it is difficult to explain fine structure.In order to obtain the fine structure of sedimentary in the study area,we use various processing technologies such as pre-stack multi-domian noise attenuation and non-linear pre-stack time migration for doing high-resolution 3D seismic reflection data on base of the analysis of the raw seismic data and problems.New results reveal the development characteristics,spatial distribution patterns and the relationship of surface composition of Bai-Wu fault.According to the section showing the strata thickness,structural feature,and characteristics of the seismic reflection wave group,the study area is divided into the three major structural layers,which are Permian,Triassic,Jurassic-Cretaceous structural layer.The different tectonic feature of the three major structural layer,is divided the study area into the western thrust belt,central fault-step zone,and eastern slope tectonic zone.
引文
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[2]邬达理,杨子兴,朱文杰.复杂条件下三维地震资料处理中的几个关键问题[J].石油物探,2002,41(2):179-185.WU Da-li,YANG Zi-xing,ZHU Wen-jie.Key issuesof 3-D seismic data processing under complicatedgeologic settings[J].Geophysical Prospecting forPetroleum,2002,41(2):179-185.
[3]Gray S H,方伍宝.地震偏移问题及其解决方案[J].勘探地球物理进展,2002,25(2):44-60.Gray S H,FANG Wu-bao.The solution and problemof seismic migration[J].Progress in ExplorationGeophysics,2002,25(2):44-60.
[4]王贺林.叠前时间偏移技术在关家堡地区地震资料处理中的应用[J].石油地球物理勘探,2006,41(增刊):1-6.WANG He-lin.Application of prestack time migrationto seismic data processing in Guanjiapu area[J].OilGeophysical Prospecting,2006,41(Sup.):1-6.
[5]Hubral P.Time migration:some ray theoretical asp-ects[J].Oil Geophysical Prospecting,1975,25(5):738-745.
[6]刘洪,刘国峰,李博,等.基于横向导数的走时计算方法及其在叠前时间偏移中的应用[J].石油物探,2009,48(1):3-11.LIU Hong,LIU Guo-feng,LI Bo,et al.The traveltime calculation method via lateral derivative of velocityand its application in pre-stack time migration[J].Geophysical Prospecting for Petroleum,2009,48(1):3-11.
[7]刘洪,袁江华,陈景波,等.大步长波场深度延拓的理论[J].地球物理学报,2006,49(6):1779-1793.LIU Hong,YUAN Jiang-hua,CHEN Jing-bo,et al.Theory of large-step wavefield depth extrapolation[J].Chinese Journal of Geophysics,2006,49(6):1779-1793.
[8]杨春梅,梁春生.多次波衰减技术的应用研究[J].天然气工业,2004,24(5):48-50.YANG Chun-mei,LIANG Chun-sheng.Applicationand research on multiple reflection attenuationtechnique[J].Natural Gas Industry,2004,24(5):48-50.
[9]刘金平,王世清,王红燕,等.叠前噪音衰减技术在高分辨率处理中的应用[J].大庆石油学院学报,2003,27(4):12-14.LIU Jin-ping,WANG Shi-qing,WANG Hong-yan,etal.Prestack noise attenuation application to highresolution seismic processing[J].Journal of DaqingPetroleum Institute,2003,27(4):12-14.
[10]覃天,凌勋,刘全艳.高分辨率三维地震资料处理方法在玛9中的应用[J].中国西部油气地质,2006,2(2):233-236.QIN Tian,LING Xun,LIU Quan-yan.Applicationof high resolution 3D seismic data processing methodsto Ma 9 area[J].West China Petroleum Geosciences,2006,2(2):233-236.
[11]芮拥军,石林光.准噶尔盆地中部地震资料提高分辨率处理研究[J].石油物探,2007,46(2):181-186.RUI Yong-jun,SHI Lin-guang.Study of processingtechnology for enhancing the resolution of seismicdata in the central area of Junggar basin[J].Geophysical Prospecting for Petroleum,2007,46(2):181-186.
[12]覃天,王彦春,凌勋.准噶尔盆地低信噪比地震资料处理方法[J].石油物探,2005,44(6):593-597.QIN Tian,WANG Yan-chun,LING Xun.Processing methods for seismic data with low signal-to-noise ratio in Junggar basin[J].GeophyscialProspecting for Petroleum,2005,44(6):593-597.
[13]周纳,刘继勇.非对称走时叠前时间偏移方法及应用[J].油气地球物理,2010,8(2):48-52.ZHOU Na,LIU Ji-yong.The method and applicationof prestack time migration by non-symmetrical traveltime[J].Petroleum Geophysics,2010,8(2):48-52.
[14]Wiggins W.Kirchhoff integral extrapolation and mig-ration of nonplanar data[J].Geophysics,1984,49(8):1239-1248.
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