Application of Von Karman Type Autocorrelation Function to Modeling Random Media
- 责任者：Li Canping (College of Information ; Guangdong Ocean University ; Zhanjiang 524088 ; China) ; Wang Nanping
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2010
- 卷期：34(1)
- 关键词：地震勘探 ; seismic exploration ; 随机介质 ; random medium
- 页码：p.98-102
- 图表：3 illus., 17 refs.
- 分类号：1500
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
This paper constructed random media models using the Von Karman type autocorrelation function, discussed the model characteristics by two model parameters of autocorrelation length and spectrum exponent and analyzed the distribution and variation of velocities in the models under the conditions of different variances. The results show that the variations of random media models of heterogeneity scales in lateral and longitudinal directions are all produced by changing autocorrelation length and lateral and longitudinal spectrum exponent. The disturbance range of the random perturbation is different if the disturbance variance is different, and such a difference results in fluctuation of velocities in models around the background velocity. The modeling figures demonstrate that random medium models can vividly describe real media.