Abstract：The surface in the hinterland of the Junggar Basin is mainly desert and ecological forest. From the analysis of the east-west section, it is known that the wave group characteristics and the frequency and phase characteristics corresponding to the two types of surface are greatly different, which results in the obvious "Yin-yang face" phenomenon on the seismic section. Therefore, considering the single shot records on different types of surface, we analyzed the reasons for the "trapping" characteristics in the first-break frequency spectrum. Combined with the demonstration and analysis of the surface structure and forward mo-del, we believe that complex near-surface multiple waves are the main factor causing the "Yin-yang face" phenomenon. Moreover, the strength and specific location of trapping are clarified, and thus this paper proposes a predictive variant-step deconvolution technology based on the difference of tra-vel time and of the time of the first trough in autocorrelation, which has an obvious suppression effect on near-surface multiple waves in this area and improves and eliminates the phenomenon of "Yin-yang face". This method has been widely used and applied in other blocks in the hinterland of the Junggar Basin, and good results have been achieved.
林娟, 蒋立, 潘龙, 冷雪梅, 张欣吉, 游伟. 复杂近地表多次波分析及压制方法探讨——准噶尔盆地腹部地震资料处理实例[J]. 石油地球物理勘探, 2021, 56(6): 1229-1235.
LIN Juan, JIANG Li, PAN Long, LENG Xuemei, ZHANG Xinji, YOU Wei. Analysis of complex near-surface multiple waves and discussion on suppression methods: a case of seismic data in the hinterland of the Junggar Basin. Oil Geophysical Prospecting, 2021, 56(6): 1229-1235.
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.
[2]
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.
[3]
刘斌, 宋智强, 王超, 等.顺北沙漠区地震资料陷波现象原因分析与消除[J]. 石油地球物理勘探, 2019, 54(6):1237-1245.LIU Bin, SONG Zhiqiang, WANG Chao, et al.Trapping-wave phenomenon elimination on seismic data in Shunbei desert area[J]. Oil Geophysical Prospecting, 2019, 54(6):1237-1245.
[4]
刘振, 张军华, 韩双, 等.与界面有关的层间多次波预测及压制[J]. 石油地球物理勘探, 2014, 49(1):61-67.LIU Zhen, ZHANG Junhua, HAN Shuang, et al.La-yer related interbed multiple elimination[J]. Oil Geophysical Prospecting, 2014, 49(1):61-67.
[5]
叶月明, 姚根顺, 赵昌垒, 等.利用地震干涉法衰减海底相关层间多次波[J]. 石油地球物理勘探, 2015, 50(2):225-231.YE Yueming, YAO Genshun, ZHAO Changlei, et al.Sea bottom peg-leg multiple suppression based on seismic interferometry[J]. Oil Geophysical Prospecting, 2015, 50(2):225-231.
[6]
谭军, 宋鹏, 李金山, 等.基于同相轴追踪的三维地震资料多次波压制方法[J]. 石油地球物理勘探, 2017, 52(5):894-905.TAN Jun, SONG Peng, LI Jinshan, et al.3D multiple suppression based on event tracking[J]. Oil Geophy-sical Prospecting, 2017, 52(5):894-905.
[7]
张军华, 缪彦舒, 郑旭刚, 等.预测反褶积去多次波几个理论问题探讨[J]. 物探化探计算技术, 2009, 31(1):6-10.ZHANG Junhua, MIAO Yanshu, ZHANG Xugang, et al.Discussion of several theoretical questions to remove seismic multiples using predictive deconvolution[J]. Computing Technologies for Geophysical and Geochemical Exploration, 2009, 31(1):6-10.
[8]
黄饶, 陈小宏, 李景叶.层间多次波模拟与影响分析[J]. 地球物理学进展, 2009, 24(3):981-987.HUANG Rao, CHEN Xiaohong, LI Jingye.Simulation and effect analysis of interbed multiples[J]. Progress in Geophysics, 2009, 24(3):981-987.
[9]
吴静, 吴志强, 胡天跃, 等.基于构建虚同向轴压制地震层间多次波[J]. 地球物理学报, 2013, 56(3):985-994.WU Jing, WU Zhiqiang, HU Tianyue, et al.Seismic internal multiple attenuation based on constructing virtual events[J]. Chinese Journal of Geophysics, 2013, 56(3):985-994.
[10]
崔永福, 刘嘉辉, 陈猛, 等.虚同向轴方法及其在陆上地震层间多次波压制中的应用[J]. 石油地球物理勘探, 2019, 54(6):1228-1236.CUI Yongfu, LIU Jiahui, CHEN Meng, et al.Land seismic peg-leg multiple attenuation with the virtual event method[J]. Oil Geophysical Prospecting, 2019, 54(6):1228-1236.
[11]
Weglein A B.Multiple attenuation:an overview of recent advances and the road ahead[J]. The Leading Edge, 1999, 18(1):40-44.
[12]
Liu F Q, Sen M K, Stoffa P L.Dip selective 2-D multiple attenuation in the plane wave domain[J]. Geophysics, 2000, 65(1):264-274.
[13]
宋家文, Verschuur D J, 陈小宏.多次波压制的研究现状与进展[J]. 地球物理学进展, 2014, 29(1):240-247.SONG Jiawen, Verschuur D J, CHEN Xiaohong.Research status and progess in multiple elimination[J]. Progress in Geophysics, 2014, 29(1):240-247.
[14]
Kelamis P G, Verschuur D J.Surface-related multiple elimination on land seismic data:Strategies via case studies[J]. Geophysics, 2000, 65(3):719-734.
[15]
Herrmann F J, Wang D, Verschuur D J.Adaptive curvelet-domain primary-multiple separation[J]. Geophysics, 2008, 73(3):A17-A21.
