Daniel CabreraThe author is a rock mechanics laboratory scientist in the Fractured Rocks Laboratory “Dr. Edgar Rangel”, National Autonomus University of Mexico (UNAM). The activities include the design and execution of advanced petrophysical experiments in unconventional reservoir rocks, mathematical modeling to interpret experimental data, and applied research for developing new tests and methodologies for PEMEX-PEP and private companies.  Furthermore, the author is an adjunct professor in the School of Engineering, UNAM.The professional experience of the author has passed through industries of construction, petroleum engineering, and scientific research and development.  Fernando Samaniego VThe author holds B.S. and M.S. degrees from the National University of México (UNAM) and a Ph.D. degree from Stanford University, all in petroleum engineering. He has worked for the Mexican Petroleum Institute, the Electric Research Institute, and PEMEX, and currently is a professor of Petroleum Engineering at UNAM.

• Petrophysics or Geomechanics: A branch of Mechanics.- Petrophysical Classification of Rocks.- Experimental Permeability Tensor for Fractured Porous Rocks.- Scaling Experimental Immiscible Flow and Geomechanics in Fractured Porous Rock.- General General Conclusions.

Daniel CabreraThe author is a rock mechanics laboratory scientist in the Fractured Rocks Laboratory “Dr. Edgar Rangel”, National Autonomus University of Mexico (UNAM). The activities include the design and execution of advanced petrophysical experiments in unconventional reservoir rocks, mathematical modeling to interpret experimental data, and applied research for developing new tests and methodologies for PEMEX-PEP and private companies.  Furthermore, the author is an adjunct professor in the School of Engineering, UNAM.The professional experience of the author has passed through industries of construction, petroleum engineering, and scientific research and development.  Fernando Samaniego VThe author holds B.S. and M.S. degrees from the National University of México (UNAM) and a Ph.D. degree from Stanford University, all in petroleum engineering. He has worked for the Mexican Petroleum Institute, the Electric Research Institute, and PEMEX, and currently is a professor of Petroleum Engineering at UNAM.

• Petrophysics or Geomechanics: A branch of Mechanics.- Petrophysical Classification of Rocks.- Experimental Permeability Tensor for Fractured Porous Rocks.- Scaling Experimental Immiscible Flow and Geomechanics in Fractured Porous Rock.- General General Conclusions.