Evaluation of Nanoscale Accessible Pore Structures for Improved Prediction of Gas Production Potential in Chinese Marine Shales

摘要: The Lower Cambrian Niutitang and Silurian Longmaxi shales in the Upper Yangtze Platform (UYP) are most promising strata for shale gas exploration China. Knowledge of nanoscale pore structure may improve prediction production potential Chinese marine shales. A systematic investigation accessibility its impact on methane adsorption capacity has been conducted samples using various techniques including geochemical mineralogical analyses, field-emission scanning electron microscopy (FE-SEM), small-angle neutron scattering (SANS), helium porosimetry, adsorption. results show that organic matter (OM) pores with shapes dominate systems these OM tended to mix clay minerals converted organoclay complexes, developing plentiful micro- mesopores. unified fit model two structures, fractal finite pores, was used SANS data characterize the...