1887

Abstract

Geomechanical modeling is of great importance for different tasks of prospecting geophysics. This modeling requires knowledge on geomechanical characteristics including the static moduli (Young modulus and Poisson coefficient), the uniaxial compression strength and internal friction angle. The only way to get reliable geomechanical parameters is laboratory tests providing “stress-strain” curves. However, this way is time consuming and should be performed for many representative samples of all stratigraphic units penetrated by a well. Many empirical relations exist that allow one to relate the dynamic moduli provided by logging with the geomechanical parameters. However these relations work only locally. In this work we propose an approach based on classification of rocks with respect to their macrostructure controlling the both dynamic moduli and geomechanical characteristics. The microstructure is described by the rock’s model parameters inverted from the experimental data with the help of the Rock Physics modeling. This makes it possible to group different rocks into classes with respect to the model parameters. As a result this allows one to find relations between the dynamic elastic parameters measured in field and geomechanical and other physical parameters (not measured) for different rock groups via the rock microstructure parameters specific of each rock group.

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/content/papers/10.3997/2214-4609.201600214
2016-04-11
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201600214
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