“…Note: BI-brittleness index, FI-fracturability Index, πΈnormalized Young's modulus, π -the normalized Poisson's ratio, π΅ -normalized brittleness, πΊ _ -strain energy release rate, πΎ _ -normalized fracture toughness, Q-quartz, C-carbonate, Cl-clay, Dol-dolomite, Lm-limestone, TOC-total organic content, π -uniaxial compressive strength of rock, π -tensile strength of rock. Fuling shale gas field of the Jiaoshiba Block in China [113], North Perth Basin shale gas reservoirs in Australia [116], Permian Basin Spraberry and Wolfcamp formations [117], Wise and Denton Counties of Barnett Shale [118].…”