“…• Based on mechanical properties, mineralogy, and organic geochemistry 7 • The use of permeability, porosity, and irreducible water saturation data either empirically 5,8−10 or with a hydraulic flow unit (HFU) approach; 1,3,11 • Involvement of capillary pressure data and J-function 12−14 and combined with radius; 5 • Consideration of thin section descriptions and interpretations such as rock fabrics, 15 depositional facies, 16 and rock textures; 17,18 • Geostatistics and machine learning implementation such as clustering, 19,20 ANN, 21 self-organizing map, 22,23 and fuzzy logic; 24 • Grouping based on the dimensionless form of absolute permeability, relative permeability, porosity, and phase viscosity, the so-called true effective mobility TEM function; 25,26 • The use of resistivity data and porosity to yield in electrical flow unit; 27 • Further development of analytical models, such as the pore geometry and structure (PGS) method. 28−31 The PGS method is built on the basis of the Kozeny−Carman and capillary bundled model equations, ending up with a plot between y k/ and x � k/ϕ 3 within a power function y = ax b28, 29 such that The inspiration came from the facts that many physical phenomena in nature are in a power law scaling relationship.…”