The Application on Q Value Inversion with the Direct Wave of VSP in ShengLi Oilfield

Abstract:

The earth filtering is inevitably in seismic wave propagation and the parameters to represent earth filter intensity is the absorption coefficient and the Q value. Using zero-offset vsp's down-going direct wave to estimated Q value is considered the most reliable way to extract stratigraphic quality factor Q value. We used Ken 71 well zero-offset VSP down-going direct wave with the centroid frequency shift method to estimate layer Q value. First, by processing the zero-offset VSP data, we separated down-going-direct wave and up-going wave. Then, we analysis and calculated the layer-velocity and layer Q value using down-going wave. At last, we made the bridge comparison chart by the up-going-wave processed. The bridge comparison chart compared with the layer-velocity and layer-Q value, results show that the corresponding relations are very good.

• Periodical: Advanced Materials Research (Volumes 616-618)
• Pages: 753-756
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.753
• Online since: December 2012
• Authors: Gui Hua Li, Jian Guo Feng, Nian Tian Lin, Wen Bo Zhang
• Keywords: CFS Method, Q Value Inversion, Zero-Offset VSP

References

[1] Zhaojun Ma, LIU Yang. A Summary of research on seismic attenuation[J].Progress in Geophysics,2005,20(4):1074-1082

[2] Youli Quan, Jerry M.Harris. Seismic attenuation tomography using the frequency shift method.Geophysics,1997,62(3): 895-905．

DOI: 10.1190/1.1444197

[3] Guangming Zhu. Vertical Seismic Profile Method（In Chinese）[M].Beijing: Petroleum Industry Press, 1988:177-191