A Scheme for Picking First-Arrival of Air-Gun Records in Three Stages

被引：0
|
作者：
Zhu Y. [1 ]
Zhang Y. [2 ]
机构：
[1] Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing
[2] Key Laboratory of Seismic Observation and Geophysical Imaging, Institute of Geophysics, China Earthquake Administration, Beijing
来源：
Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2019年 / 55卷 / 01期
关键词：
Air-gun source; First arrival; Fractal dimension; Wavelet transform;
D O I：
10.13209/j.0479-8023.2018.030
中图分类号：
学科分类号：
摘要：
The routinely picked results of first arrival of air-gun source data is poor, mainly because of its low signal-to-noise ratio (SNR). The anthors introduce the seismic exploration methods to pick the first-arrival and proposes a scheme for picking first-arrival in three stages to reduce the dependence on data's SNR. Firstly, the noise was depressed. And then, the traditional exploration method was used to calculate the characteristic curve. Finally, the first-arrival was determined by combining the edge-preserving smoothing method. On this basis, according to the characteristics of practical data, the authors design an automatic pick-up process, which is used to pick up the first arrival of practical data. Compared with the traditional method, this method requires less SNR for the data and provides more available materials for subsequent processing and analysis. © 2019 Peking University.
引用
收藏
页码：120 / 132
页数：12
相关论文
共 16 条
  • [1] Li J., Hanafy S., Skeletonized inversion of surface wave: active source versus controlled noise comparison, Interpretation, 4, 3, pp. SH11-SH19, (2016)
  • [2] Calvert A.J., Seismic reflection imaging of two me-gathrust shear zones in the northern Cascadia sub-duction zone, Nature, 428, pp. 163-167, (2004)
  • [3] Peraldi R., Clement A., Digital processing of refraction data study of first arrivals, Geophysical Prospecting, 20, 3, pp. 529-548, (1972)
  • [4] Stevenson P.R., Microearthquakes at Flathead lake, Montana: a study using automatic earthquake processing, Bulletin of the Seismological Society of America, 66, 1, pp. 61-80, (1976)
  • [5] Liu H., Zhang J.Z., STA/LTA algorithm analysis and improvement of Microseismic signal automatic detec-tion, Progress in Geophysics, 29, 4, pp. 1708-1714, (2014)
  • [6] Coppens F., First arrival picking on common-offset trace collections for automatic estimation of static cor-rections, Geophysical Prospecting, 33, 8, pp. 1212-1231, (1985)
  • [7] Sabbione J.I., Velis D., Automatic first-breaks picking: new strategies and algorithms, Geophysics, 75, 4, pp. 67-76, (2010)
  • [8] Chen J., Kang X., Liu Y., Et al., Median filtering foren-sics based on convolutional neural networks, IEEE Signal Processing Letters, 22, 11, pp. 1849-1853, (2015)
  • [9] Daubechies I., Chui C.K., Functional analysis, Science, 257, pp. 821-822, (1992)
  • [10] Denis A., Cremoux F., Using the entropy of curves to segment a time or spatial series, Mathematical Geology, 34, 8, pp. 899-914, (2002)
12