shear and compressional wave velocities along with other petrophysical logs, are considered as upmost important data for hydrocarbon reservoirs characterization. shear wave velocity (vs) in well logging is commonly measured by some sort of dipole logging tools, which are able to acquire shear waves as well as compressional waves such as sonic scanner, dsi (dipole shear sonic imager) by schlumbe...

A quantitative description of the permeability deep coal is great significance for improving coalbed methane recovery and preventing gas disasters. The Schlumberger–Doll research (SDR) model often used to predict rock permeability, but it has inherent defects in characterizing pore structure coal. In this study, a with fractal characteristics (FCP model) established based on nuclear magnetic re...