Study on the Full-Range Pore Size Distribution and the Movable Oil Distribution in Glutenite

The pore size distribution (PSD) and fluid mobility parameters are vital parameters for predicting rock properties and the reservoir quality classification. Because of the characteristics of strong heterogeneity, a complex pore-throat structure, and a wide PSD of glutenite, it is more difficult to acquire the full-range PSD and fluid occurrence states of glutenite. This paper investigates the full-range PSD, the distribution, and the controlling factors of the movable oil in glutenite based on various experiments. X-ray diffraction, casting thin sections, scanning electron microscopy (SEM), low-temperature nitrogen adsorption (LTNA), high-pressure mercury intrusion, and nuclear magnetic resonance (NMR)–centrifugation experiments were conducted on 18 glutenite samples from the Mahu Sag, Junggar Basin, China. A new method for characterizing the full-range PSD of glutenite was proposed by integrating LTNA and NMR–centrifugation experiments, and the full-range PSD is in good agreement with the casting thin se...