Project Final Report-09122-29-The project targets on improving the understanding of the flow behavior of natural gas and introduced fluids (water, surfactant solutions and polymers) in micro-Darcy to nano-Darcy range of tight sand and shale formations by using advanced single-molecule imaging system, coreflooding experiments, combined with nano-fluidic chips and pore-scale numerical simulation techniques. This reports our three years’ effort for this RPSEA funded research project.