摘要：Based on scanning electron microscopy and ni- trogen adsorption erqaeriment at low temperature, the pore types and structures of the Longmaxi Formation shale in the Dianqianbei area, SW China were ana- lyzed, and a molecular model was built. According to central composite design model, the validation of the model was solved by converting it into a mathe- matical formula. Effect of depth, temperature and pressure on replacement rate is studied. This study provides the theoretical basis for quantitative study of shale reservoirs.
