Abstract
On the basis of Chapman’s (2003) model, as the seismic wave incidences angles vary from 0° to 45° while propagating in anisotropic media (HTI), the slow S-wave will sufferred by serious attenuation and dispersion and is sensitive to fluid viscosity but the P- and fast S-waves don’t. For slow S waves propagating normal to fractures, the amplitudes are strongly affected by pore fluid. So, the slow S-wave can be used to detect fractured reservoir fluid information when the P-wave response is insensitive to the fluid. In this paper, 3D3C seismic data from the Ken 71 area of Shengli Oilfield are processed and analyzed. The travel time and amplitude anomalies of slow S-waves are detected and correlated with well log data. The S-wave splitting in a water-bearing zone is higher than in an oil-bearing zone. Thus, the slow S-wave amplitude change is more significant in water-bearing zones than in oil-bearing zones.
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This work was supported by the National 863 Program (Grant No. 2007AA060505).
Bi Li-Fei is a PhD student at China University of Geosciences (Wuhan) as well as a senior engineer in Shengli Geophysical Institute. His research mainly focuses on 3D3C seismic data processing and methods.
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Bi, LF., Qian, ZP., Zhang, F. et al. Application of seismic anisotropy fluid detection technology in the Ken 71 well block of Shengli Oilfield. Appl. Geophys. 8, 117–124 (2011). https://doi.org/10.1007/s11770-011-0281-5
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DOI: https://doi.org/10.1007/s11770-011-0281-5