Experimental Study on Adsorption Pore Structure and Gas Migration of Coal Reservoir Using Low-Field Nuclear Magnetic Resonance

Figure 1

Analysis and imaging systems of coal structure and gas seepage: (1) displacement device; (2) middle container; (3) transition device, which may contain water, oil, and gas; (4) high-temperature and high-pressure system; (5) nuclear magnetism unit; and (6) closet, which mainly includes radio frequency cabinet, gradient cabinet, and imaging module.