摘要
海洋地震资料处理中,通常采用的提取远场子波方法是从地震资料中直接提取和根据自由气泡震荡理论中不相干子波叠加算法由近场子波推算远场子波,但这两种方法都不精确。首先分析了由OBS模拟垂直观测地震系统实测得到远场子波,进而获取零相位算子(包括零相位算子、压制气泡算子和压制虚反射算子)的原理和实际效果。利用理论模型和实际数据对所述方法进行了检验,得到的结果不仅消除虚反射、气泡效应影响,而且整形为零相位。通过上述处理消除了非零相位数据对高分辨率处理和解释标定的影响,从实际数据处理效果来看此方法是切实可靠的。
In ocean seismic data processing, the commonly used method of extracting far field wavelet is to directly extract the far-field wavelet from the seismic data and calculate the far-field wavelet from the near-field wavelet according to the irrelevant wavelet superimposition algorithm in the free-bubble oscillation theory.However, neither method is accurate. In this paper, the principle and the practical effect of the zero-phase operator（ including zero-phase operator, de-bubble operator and de-ghost operator） obtained by measuring the far-field wavelet obtained from the simulated vertical cable seismic system of OBS are analyzed. Using the theoretical model and the actual data, the method described in this paper is tested. The results obtained not onlyeliminate the effects of ghost and bubble, but also shape the seismic data to zero phase. The above process eliminates the influence of non-zero phase data on high-resolution processing and interpretation calibration, and the method is reliable from the actual data processing effect.
作者
张旭东
尹成
陈玺
ZHANG Xudong;YIN Cheng;CHEN Xi(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Key Laboratory of Marine Mineral Resources,Ministry of Land and Resources,Guangzhou Marine Geological Survey,Guangzhou 510075,China)
出处
《华南地震》
2018年第2期1-7,共7页
South China Journal of Seismology
基金
中国地质调查局项目(DD20189642)
