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Multi-scale frequency and absorption attributes of seismic signals
Seismic absorption is sensitive to gas saturation, and this can lead to a number of observable features, such as low dominant frequency, absence of high frequencies and dimming of reflections. We obtain the time–frequency distribution of seismic signals at different scales based on wavelet decomposition and try to analyse the response of high-frequency sections for the characterization of hydrocarbon reservoirs. We present a case study using multi-scale (dominant) frequency and multi-scale absorption, and demonstrate that the method is effective in recognizing a deep tight-sandstone gas reservoir. By this study, we can draw the conclusion that multi-scale frequency and absorption attributes may indicate the gassy areas in reservoirs, and we have obtained many good applications in the Sichuan basin of China.
Multi-scale frequency and absorption attributes of seismic signals
Seismic absorption is sensitive to gas saturation, and this can lead to a number of observable features, such as low dominant frequency, absence of high frequencies and dimming of reflections. We obtain the time–frequency distribution of seismic signals at different scales based on wavelet decomposition and try to analyse the response of high-frequency sections for the characterization of hydrocarbon reservoirs. We present a case study using multi-scale (dominant) frequency and multi-scale absorption, and demonstrate that the method is effective in recognizing a deep tight-sandstone gas reservoir. By this study, we can draw the conclusion that multi-scale frequency and absorption attributes may indicate the gassy areas in reservoirs, and we have obtained many good applications in the Sichuan basin of China.
Multi-scale frequency and absorption attributes of seismic signals
Multi-scale frequency and absorption attributes of seismic signals
Tianji Xu (author) / Bingjie Cheng (author) / Zhongping Qian (author) / Jianming Tang (author) / Qigang Gan (author) / Zhongmin Shen (author)
Journal of Geophysics and Engineering ; 8 ; 457-463
2011-09-01
7 pages
Article (Journal)
Electronic Resource
English
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