uniaxial compressive strength (ucs) and internal friction coefficient (µ) are the most important strength parameters of rock. they could be determined either by laboratory tests or from empirical correlations. the laboratory analysis sometimes is not possible for many reasons. on the other hand, due to changes in rock compositions and properties, none of the correlations could be applied as an ...

-Multivariate statistical analyses of geochemical, mineralogical, and cation-exchange capacity (CEC) data from a Venezuelan oil well were used to construct a model which relates elemental concentrations to mineral abundances. An r-mode factor analysis showed that most of the variance could be accounted for by four independent factors and that these factors were related to individual mineral com...

The existence of shale has a major effect on reservoir quality because it reduces the rock’s both porosity and permeability. There are several types shale, they can be distributed in sand four different ways: laminated, structural, dispersed, or any combination these. Each them various features physical properties. Therefore, volume estimation is one most important challengin tasks to solved in...