Study on the microscopic pore structures of the four different kinds of lithological reservoirs in the basin of Western China

Abstract In the basin of western China, four different kinds lithological reservoirs are developed, including low-permeability sandstone, sedimentary tuff, shale and volcanic rock. There is generally a large difference in micropore structure characteristics distribution laws due to reservoirs. The reserving capacity as well porous flowability, mechanism determined by hydrocarbon Low-temperature nitrogen adsorption desorption technology, high-pressure mercury injection experiment nuclear magnetic resonance (NMR) testing technology applied study size, quantity, their similarities differences corresponding relation with macroporosity–permeability physical parameters. This paper also studies movable fluid nonlinear seepage flow