[1] http://petrowiki.org/Porosity_evaluation_with_acoustic_logging [2] http://pangea.stanford.edu/~jack/GP170/Reading%231.pdf BWLA - Porosity Logs.pdf Open_Hole_Wireline_logging.pdf Wyllie, M.R.J., Gregory, A.R., and Gardner, L.W. 1956. Elastic Wave Velocities in Heterogeneous and Porous Media. Geophysics 21 (1): 41–70. http://dx.doi.org/10.1190/1.1438217
Gardner, G.H.F., Gardner, L.W., and Gregory, A.R., 1974, Formation velocity and density -- the diagnostic basics for stratigraphic traps: Geophysics, 39, 770-780.
Raymer, L.L., Hunt, E.R., and Gardner, J.S., 1980, An improved sonic transit time-to-porosity transform: SPWLA 21 Ann. Logging Symp., July 8-11, 1980, 1-12.
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