Abstract：Trapping-wave phenomena are quite common on seismic shot records in Shunbei desert area,Taklimakan Desert hinterland.The frequency of trapping wave is around 15Hz just within the band of exploration targets,which affects greatly the seismic imaging.Our theoretical analysis demonstrates that these phenomena are caused by strong-energy shallow multi-refractions.These multi-refractions are mixed with underground reflections.In the spectrum,it shows a form of "two high sandwiched one low" with the dominant frequency of underground reflections,seems like a visual "trapping-wave" phenomenon.With the wavefield separation,shallow multi-refractions are separated and eliminated,and the seismic imaging is greatly improved.
陈学强,段孟川,钟海,等.塔里木盆地碳酸盐岩提高分辨率地震采集技术[J].石油地球物理勘探,2004,39(西部会议专刊):50-54.CHEN Xueqiang,DUAN Mengchuan,ZHONG Hai,et al.High-resolution seismic acquisition technology for carbonate rocks in Tarim basin[J].Oil Geophysical Prospecting,2004,39(Western Conference Special Issue):50-54.
[2]
杨平,孙赞东,李海银,等.影响岩溶缝洞体地震反射特征的关键因素分析[J].石油地球物理勘探,2015,50(3):523-529.YANG Ping,SUN Zandong,LI Haiyin,et al.Analysis of key factors affecting seismic reflection characteristics of karst fractures and caves[J].Oil Geophysical Prospecting,2015,50(3):523-529.
[3]
蔡希玲,张俊桥.复杂地表区噪声分析技术与压噪方法应用[J].石油地球物理勘探,2002,37(增刊1):1-4.CAI Xiling,ZHANG Junqiao.Noise analysis techno-logy and application of noise suppression method in complex surface area[J].Oil Geophysical Prospecting,2002,37(S1):1-4.
[4]
李天树,陈宝德.双井微测井技术在表层调查结构中的应用[J].石油物探,2004,43(5):471-474.LI Tianshu,CHEN Baode.Application of dual well micrologging in surface investigation structure[J].Geophysical Prospecting for Petroleum,2004,43(5):471-474.
[5]
张庆淮,李玉兴.沙漠区宽频高能噪声对地震记录的影响[J].石油地球物理勘探,2008,43(2):142-145.ZHANG Qinghuai,LI Yuxing.Effects of broadband high-energy noise on seismic records in desert areas[J].Oil Geophysical Prospecting,200843(2):142-145.
[6]
吕公河.地震勘探虚反射界面的测定及其利用[J].石油地球物理勘探,2002,37(3):296-300.LYU Gonghe.Determination and utilization of ghost reflection interface in seismic exploration[J].Oil Geophysical Prospecting,2002,37(3):296-300.
[7]
李合群,孟小红,赵波,等.塔里木沙漠区地震数据品质与沙层Q吸收[J].石油地球物理勘探,2010,45(1):28-34.LI Hequn,MENG Xiaohong,ZHAO Bo,et al.Seismic data quality and sand Q absorption in Tarim desert[J].Oil Geophysical Prospecting,2010,45(1):28-34.
[8]
谭绍泉,徐锦玺,张庆怀,等.虚反射和岩性对激发井深选择的影响[J].油气地球物理,2003,1(3):11-14.TAN Shaoquan,XU Jinxi,ZHANG Qinghuai,et al.Influence of ghost reflection and lithology on selection of excitation well depth[J].Oil and Gas Geophysics,2003,1(3):11-14.
[9]
凌云,高军,张汝杰.地表一致性变预测步长反褶积与沙丘鸣震的压制[J].石油地球物理勘探,1998,33(1):23-31.LING Yun,GAO Jun,ZHANG Rujie.Surface consis-tent deconvolution using variable prediction step and suppression of sand dune ringing[J].Oil Geophysical Prospecting,1998,33(1):23-31.
[10]
陈学强,白文杰,钟海.沙漠区高信噪比地震采集方法[J].石油地球物理勘探,2010,45(3):321-325.CHEN Xueqiang,BAI Wenjie,ZHONG Hai.High signal-to-noise ratio seismic acquisition method in desert area[J].Oil Geophysical Prospecting,2010,45(3):321-325.
[11]
李庆忠.走向精确勘探道路[M].北京:石油工业出版社,1994,34-38.
[12]
龚明平,张军华,王延光,等.分方位地震勘探研究现状及进展[J].石油地球物理勘探,2018,53(3):642-658.GONG Mingping,ZHANG Junhua,WANG Yanguang,et al.Research status and progress of azimuth seismic exploration[J].Oil Geophysical Prospecting,2018,53(3):642-658.
[13]
赵玲芝,谷跃民,张建中,等.多信息融合的近地表速度建模技术及应用[J].石油地球物理勘探,2017,52(1):34-41.ZHAO Lingzhi,GU Yuemin,ZHANG Jianzhong,et al.Multi-information fusion near-surface velocity modeling technology and its application[J].Oil Geophysical Prospecting,2017,52(1):34-41.
[14]
王晓涛,谭佳,毛海波,等.强衰减条件下能量比法的修正及其应用[J].石油地球物理勘探,2017,52(1):42-47.WANG Xiaotao,TAN Jia,MAO Haibo,et al.Modification and application of energy ratio method under strong attenuation conditions[J].Oil Geophysical Prospecting,2017,52(1):42-47.
[15]
张华,陈小宏,李红星,等.曲波变换三维地震数据去噪技术[J].石油地球物理勘探,2017,52(2):226-232.ZHANG Hua,CHEN Xiaohong,LI Hongxing,et al.Seismic data denoising technology based on Curvelet transform[J].Oil Geophysical Prospecting,2017,52(2):226-232.
[16]
白英哲,孙赞东,周新源.Q偏移在塔里木盆地碳酸盐岩储层成像中的应用[J].石油地球物理勘探,2011,46(增刊1):7-11.BAI Yingzhe,SUN Zandong,ZHOU Xinyuan.Application of Q migration in carbonate reservoir imaging in Tarim basin[J].Oil Geophysical Prospecting,2011,46(S1):7-11.
[17]
何振香.改进南疆地震勘探工作的几点意见[J].石油地球物理勘探,1980,15(增刊1):92-94.HE Zhenxiang.Suggestions on improving seismic exploration in southern Xinjiang[J].Oil Geophysical Prospecting,1980,15(S1):92-94.
[18]
周翼,陈学强,江民,等.塔克拉玛干沙漠区浅表层对地震波的吸收衰减作用[J].石油地球物理勘探,2016,51(2):218-223.ZHOU Yi,CHEN Xueqiang,JIANG Min,et al.Absorption and attenuation of seismic waves in the shal-low surface of Taklamakan desert[J].Oil Geophysical Prospecting,2016,51(2):218-223.
[19]
吴群苍.塔克拉玛干沙漠区静校正数据的采集与整理[J].石油地球物理勘探,1985,20(2):146-152.WU Quncang.Collection and collation of statics data in Taklamakan desert[J].Oil Geophysical Prospecting,1985,20(2):146-152.
[20]
于承业,周志才.利用双井微测井资料估算近地表Q值[J].石油地球物理勘探,2011,46(1):89-92.YU Chengye,ZHOU Zhicai.Using dual-well micro-logging data to estimate Q value near the surface[J].Oil Geophysical Prospecting,2011,46(1):89-92.
