摘要
在海洋地震勘探中产生的鬼波会抑制低频分量，造成频域的陷波点，降低地震记录的分辨率，使地震记录的同相轴发生混叠甚至产生假的同相轴。笔者采用FK域水平电缆压制鬼波法，将地震数据进行FK变换，对维纳滤波求取反福积算子投影到FK域，并对二者进行福积，将结果FK反变换回时间域。鬼波压制后的模型数据频带得到了有效拓宽，低频、高频信息均得到了加强。鬼波压制后的实际数据目的层频带从12~60Hz拓宽到8~75Hz,三亚组能量与合成记录匹配较原始数据更好。
In the process of marine seismic exploration, the ghost wave will depress low frequency part, lead to trap wave point in frequency do m a i n , reduce the resolution of seismic record, and cause to overlap in which would event and even fake events existed. The seismic data F K transforming have been taken using F K domain horizon cable depression ghost wave method. The method calculates deconvolution operator for Wiener filtering and projects in F K domain, then con volutes them, and the result finally transforms to time domain. The band of model data after deghosting is widened, and the low and high frequency data are enhanced. The frequency band of seismic data is widened from 12 ?60 H z to 8 ?75 H z by deghosting. The amplitude matching is better between seismic data and synthetic seismogram at Sanya Formation after deghosting.
作者
钟明睿
刘金朋
王兴芝
郑如秋
ZHONG Ming-rui;LIU Jin-peng;WANG Xing-zhi;ZHENG Ru-qiu(College of Geo-exploration Science and Technology , Jilin University , Changchun 130026, China;EnerTech-Drilling & Production Co., Development & Prospecting Geophysical Institute , CNOOC , Zhanjiang 524057,Guangdong , China;CNOOC -Ltd . Zhanjiang , CNOOC , Zhanjiang 524057, Guangdong , China)
出处
《世界地质》
CAS
2016年第3期873-880,共8页
World Geology
基金
中海油能源发展科技项目(CNOOC-KJ 125 ZDXM 06 LTD NFCJF 2012-01)
关键词
鬼波
陷波点
频谱
FK域
ghost
trap wave point
frequency spectrum
F K domain
