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- W2087851196 abstract "An important application of 3-D converted P to S-waves (PS-waves) is to exploit S-wave birefringence (splitting) for delineating reservoir fractures. In azimuthally anisotropic media, fracture intensities and orientations are directly related to traveltime differences between the fast and slow S-wave and the polarization direction of the fast S-wave, respectively. A 3-D data set from the Green River basin, Wyoming has had common-azimuth processing to optimally preserve the azimuthal effects of S-wave splitting. Analysis techniques to help characterize a fracture setting are demonstrated using this data. Ratios of fast (PS1) and slow (PS2) average velocity are particularly important to identify the vertical extent of overburden anisotropy, as well as reservoir horizons. Overburden effects can be removed by 2Cx2C Alford rotation and layer-stripping analyses before characterizing deeper horizons. In addition, less quantitative attributes, which are very sensitive indicators of S-wave splitting, can be employed such as residual off-diagonal 2Cx2C amplitudes after overburden removal and isochron differences between PS1 and PS2. Combining these attributes with traditional structural and stratigraphic information should provide a more complete geologic interpretation and insights into potential reservoirs with fracture porosity." @default.
- W2087851196 created "2016-06-24" @default.
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- W2087851196 date "2001-01-01" @default.
- W2087851196 modified "2023-09-25" @default.
- W2087851196 title "Green River basin 3‐D/3‐C case study for fracture characterization: Analysis of PS‐wave birefringence" @default.
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- W2087851196 doi "https://doi.org/10.1190/1.1816744" @default.
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