Geochemistry and Mineralogy of Lower Paleozoic Heituao Shale from Tadong Low Uplift of Tarim Basin, China: Implication for Shale Gas Development

Tarim Basin is the largest Petroliferous basin in China, while its shale gas development potential has not been fully revealed. The organic-rich black middle Ordovician Heituao Formation from Tadong low uplift of considered as an important source rock and characteristic large thickness, high organic matter content thermal maturity degree. To obtain potential, geochemical, mineralogical mechanics research conducted based on Rock-Eval pyrolysis, total carbon (TOC), X-ray diffraction (XRD) uniaxial compression experiments. results show that: (1) TOC ranges between 0.63 2.51 wt% with average value 1.22 wt%, Tmax values are 382–523 °C (average = 468.9 °C), S2 relatively which 0.08 to 1.37 mg HC/g (averaging 0.42 rock); (2) poor abundance indicated by value, gas-prone property, post mature stage (stage dry gas). (3) Quartz main mineral component samples, accounting for 26–94 72 wt%. Additionally, Young’s modulus 20.0 23.1 GPa 21.2 GPa, Poisson’s ratio 0.11 0.21 0.15); (4) fracability parameter brittleness index (BI) 0.28 0.99 0.85), indicating good development. This study reveals accumulation Basin, beneficial future exploration production practice.