A deghosting method on variable-depth streamer data based on wavefield extrapolation and inversion
Wang Jianhua1, Wang Yandong1, Liu Guochang2
1. National Engineering Laboratory for Offshore Oil Exploration, CNOOC Research Institute, Beijing 100028, China; 2. Branch Department, National Engineering Laboratory for Offshore Oil Exploration, China University of Petroleum(Beijing), Beijing 102249, China
Abstract：Deghosting is a key and difficult step in the high-resolution data processing of marine seismic.Ghosts cause notches,which narrows seismic data bandwidth and affects seriously seismic imaging and reservoir inversion.In this paper,a deghosting method on variable-depth streamer data is deve-loped based on wavefield extrapolation and inversion.First mirror data is generated with wavefield extrapolation.Then the mirror data are applied to the conjugate gradient inversion algorithm.So deghosted data can be obtained with an iterative inversion.Tests on synthetic data and real seismic data show that the proposed deghosting method can effectively attenuate ghost and broaden seismic data bandwidth,which provides high-quality broadband seismic data for further seismic interpretation and inversion.
王建花, 王艳冬, 刘国昌. 基于波场延拓和反演的变深度缆地震数据鬼波压制方法[J]. 石油地球物理勘探, 2017, 52(5): 885-893.
Wang Jianhua, Wang Yandong, Liu Guochang. A deghosting method on variable-depth streamer data based on wavefield extrapolation and inversion. OGP, 2017, 52(5): 885-893.
张振波,李东方,轩义华等.白云凹陷深水复杂构造区斜缆地震资料处理关键技术及应用.石油物探,2014,53(6):657-664.Zhang Zhenbo,Li Dongfang,Xuan Yihua et al.Variable-depth streamer seismic data processing in deepwater complex structure area of Baiyun Sag.GPP,2014,53(6):657-664.
[2]
张振波,李东方.斜缆宽频地震勘探技术在珠江口盆地的应用.石油地球物理勘探,2014,49(3):451-456.Zhang Zhenbo,Li Dongfang.Variable-depth streamer seismic acquisition and processing in Pearl River Mouth Basin.OGP,2014,49(3) 451-456.
[3]
许自强,方中于,顾汉明等.海上变深度缆数据最优化压制鬼波方法及其应用.石油物探,2015,54(4):404-413.Xu Ziqiang,Fang Zhongyu,Gu Hanming et al.The application of optimal deghosting algorithm on marine variable-depth streamer data.GPP,2015,54(4):404-413.
[4]
Tenghamn R,Vaage S,Borresen C.Adual-sensor towed marine streamer:Its viable implementation and initial results.SEG Technical Program Expanded Abstracts,2007,26:989-992.
[5]
张振波,轩义华,刘宾等.双检与上下缆地震数据联合成像.石油地球物理勘探,2014,49(5):884-891.Zhang Zhenbo,Xuan Yihua,Liu Bin et al.Joint imaging of dual-sensor and over-under streamer data.OGP,2014,49(5):884-891.
[6]
吴志强.海洋宽频带地震勘探技术新进展.石油地球物理勘探,2014,49(3):421-430.Wu Zhiqiang.New advances in marine broadband seismic exploration.OGP,2014,49(3):421-430.
[7]
赫建伟,顾汉明,吴耀乐等.波场延拓最小二乘法去虚反射技术在上下缆采集数据处理中的应用.石油地球物理勘探,2015,50(3):424-430.He Jianwei,Gu Hanming,Wu Yaole et al.Ghost elimi-nation with extrapolation least square for seismic data acquired by over/under tow-streamers.OGP,2015,50(3):424-430.
[8]
刘春成,刘志斌,顾汉明.利用上/下缆合并算子确定海上上/下缆采集的最优沉放深度组合.石油物探,2013,52(6):27-33.Liu Chuncheng,Liu Zhibin,Gu Hanming.The determination of optimal sinking depths of over/under streamers in offshore survey by merge operator.GPP,2013,52(6):27-33.
刘春成,陶杰,焦振华等.海洋"犁式"电缆采集技术研究及实践.石油地球物理勘探,2016,51(6):1069-1074.Liu Chuncheng,Tao Jie,Jiao Zhenhua et al.Marine plow streamer acquisition.OGP,2016,51(6):1069-1074.
[11]
Soubaras R.Deghosting by joint deconvolution of a migration and a mirror migration.SEG Technical Program Expanded Abstracts,2010,29:3406-3410.
[12]
王冲,顾汉明,许自强等.最小二乘反演迭代算法在压制海上变深度缆采集数据虚反射中的应用.地球物理学报,2016,59(5):1790-1803.Wang Chong,Gu Hanming,Xu Ziqiang et al.The application of least-squares inversion iteration algorithm to deghost for marine variable-depth streamer data.Chinese Journal of Geophysics,2016,59(5):1790-1803.
[13]
Song Jianguo,Gong Yunliang,Li Shan.High-resolution frequency-domain Radon transform and variable-depth streamer data deghosting.Applied Geophysics,2015,12(4):564-572.
[14]
Lu Wenkai,Xu Ziqiang,Fang Zhongyu et al.Deghosting for variable depth streamer based on super-Gaussianity.SEG Technical Program Expanded Abstracts,2015,24:4545-4549.
[15]
Lu Wenkai,Xu Ziqiang,Fang Zhongyu et al.Receiver deghosting in the t-x domain based on super-Gaussianity.Journal of Applied Geophysics,2017,136:134-141.
[16]
王芳芳,李景叶,陈小宏.基于逆散射级数法的鬼波压制方法.地球物理学报,2013,56(5):1628-1636.Wang Fangfang,Li Jingye,Chen Xiaohong.Deghosting method based on inverse scattering series.Chinese Journal of Geophysics,2013,56(5):1628-1636.
[17]
Berkhout A J and Blacquiere G.Deghosting by echo-deblending.Geophysical Prospecting,2016,64(2):406-420.
[18]
Reshef M.Depth migration from irregular surfaces with depth extrapolation methods.Geophysics,1991,56(1):119-122.
[19]
许自强,李添才,王用军等.倾斜电缆地震资料处理关键技术及其效果分析.中国海上油气,2015,27(6):10-18.Xu Ziqiang,Li Tiancai,Wang Yongjun et al.Key technology for slant streamer seismic data processing and its application analysis.China Offshore Oil and Gas,2015,27(6):10-18.
[20]
Jun Ji.CGG method for robust inversion and its application to velocity-stack inversion.Geophysics,2006,71(4):R59-R67.
