摘要
深水地震资料处理中,水层多次波因深水水层为变速体的特性,无法应用浅水水层多次波压制技术(Shallow Water Multiple Attenuation,SWMA)进行压制,而传统的自由界面多次波压制技术(Surface-Related Multiple Elimination,SRME)压制水层多次波则不具有针对性。为此,开展了基于变水速模型驱动的深水水层多次波压制技术(Deepwater Water-layer Multiple Elimination,DWME)研究。该技术通过构建海底和变水速模型计算出水层多次波准确旅行时,在τ-p域根据水层多次波旅行时将地震数据进行延拓,得到水层多次波模型,然后应用自适应匹配相减方法完成水层多次波压制。理论模型验证及海外某工区实际地震资料应用结果表明,DWME对深水水层多次波压制效果较好,且针对性强。
It is difficult to attenuate deepwater water layer multiple using the shallow water multiple attenuation(SWMA)method or the conventional surface related multiple elimination(SRME)method,because the deepwater water layer velocity is not constant.This paper proposes a deepwater water layer multiple elimination(DWME)method driven by a variable water velocity model.The method first estimates the water layer multiple travel time by building the sea bottom model and variable water velocity model.Then,seismic data wave field extrapolation is performed according to the estimated travel time in theτp domain to predict water layer multiple.Finally,the adaptive matching subtraction is applied to eliminate the multiples.Testing results on both synthetic data and field data show that the DWME can effectively suppress deepwater water layer multiples.
作者
张治忠
尹成
谢岚
李三福
刘金朋
覃殿明
赵明
ZHANG Zhizhong;YIN Cheng;XIE Lan;LI Sanfu;LIU Jinpeng;QIN Dianmin;ZHAO Ming(School of Oil and Natural Gas Engineering,Southwest Petroleum University,Chengdu 610599,China;Zhanjiang Branch,China Oilfield Services Ltd.,Zhanjiang 524057,China;Data Processing&Interpretation Center Dept.,Oilfield Technology Division,China Oilfield Services Limited,Yanjiao 056001,China)
出处
《石油物探》
EI
CSCD
北大核心
2018年第1期113-121,共9页
Geophysical Prospecting For Petroleum
基金
中海油能源发展股份有限公司科技项目"陵水凹陷中深层弱信号识别方法研究与应用"(HFKJ-GJ2015001)资助~~
关键词
深水
水层多次波
变速体
浅水水层多次波压制技术
自由界面多次波压制技术
深水水层多次波压制技术
deepwater
water layer multiple
variable water velocity
shallow water multiple attenuation(SWMA)
surface related multiple elimination(SRME)
deepwater water layer multiple elimination(DWME)
