摘要
由于大地滤波作用,地震波的频谱随频率呈指数衰减趋势,为了补偿这种衰减,在可控震源的施工当中往往采取非线性扫描,以达到提高地震分辨率的目的。但传统的非线性扫描参数的选取仅仅根据试验资料凭经验和视觉加以确定,缺少科学依据。通过对实际资料的分析,利用主要目的层的频谱特征,求出地震波的衰减曲线,找出非线性扫描的最佳参数,实现对可控震源非线性扫描参数的定量分析。
Seismic spectrum energy decreases exponentially
with frequency due to the earth filtering.To com-
pensate the attenuation of high frequency energy,
nonlinear sweep of signals is usually used in data ac-
quisition with vibroseis to acquire high-resolution da-
ta. However. the nonlinear sweep parameters are
commonly determined on the test data according to
the appearance of data. In this paper, Ⅰ propose a
method that can determine the parameters quantita-
tively. The method requires performing spectrum a-
nalysis on real seismic data, and calculating the at-
tenuation curve of seismic waves to determine the op-
timal sweep parameters.
出处
《石油物探》
EI
CSCD
2004年第3期242-244,共3页
Geophysical Prospecting For Petroleum
关键词
可控震源
分辨率
信噪比
地震资料
地震波
频率
bibroseis
filtering
diffusion
absorption
compensation
sweep
resolution
