SONIC LOG DATA HELP DETERMINE FORMATION STRENGTH

Nathan Stein Sans Co. Boston A set of equations helps improve the reliability of using acoustical wave velocity (dynamic) data to obtain quick, acceptable estimates for the Mohr-Coulomb (static) strengths of different types of rock. Good estimates of formation strength from offset well sonic log data can help in the planning of bit programs and well stimulation procedures. Dynamic shear modulus values were calculated from Mohr-Coulomb strength plots for five limestone samples.

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