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- W2185797150 abstract "Well-bore derived measurements provide a link through rock physics, to the seismic domain. Shear wave velocity log data is important for many aspects of seismic modeling, including offset synthetic seismogram generation, and half space modeling for AVO analysis. Due to the relatively recent advent of shear wave velocity logs (VS), VS data is in many instances missing or unreliable. However, as compressional velocity logs (VP) are widely available a local empirical transform relating VP to VS would be useful. Several authors have published methods for predicting shear wave velocities in the absence of measured data, including Greenberg and Castagna (1992) and Krief (1990). These published models require, P-wave velocity information, but also accurate porosity, mineralogical content, fluid content, and associated elastic parameters. Han (1986) related VP to VS using empirical regressions of ultrasonic velocities, of 80 well-consolidated Gulf Coast sandstones. Here in, we present a simple method for determining an empirical relationship between VP and VS, and apply that relationship to a regional study in the Norwegian Sea. Discussion Our overall objective is to improve the reliability and accuracy of seismic to well ties in the Norwegian Sea, as well as to evaluate the response of synthetic seismograms to the effect of varying potential reservoir fluids. A main component is a rational rock physics model that allows for the robust prediction of shear velocity. Proper preconditioning of the well log data through rigorous log analysis is necessary to build a log suite that can be used in rock physics modeling (i.e. fluid substitution or porosity modeling) and synthetic seismogram generation. Shear wave information is vital for both. If shear velocity information is missing, VS must first be predicted." @default.
- W2185797150 created "2016-06-24" @default.
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- W2185797150 date "2002-01-01" @default.
- W2185797150 modified "2023-09-27" @default.
- W2185797150 title "Shear Velocity Prediction in the Norwegian Sea" @default.
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- W2185797150 doi "https://doi.org/10.3997/2214-4609-pdb.5.b042" @default.
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