Low-field NMR laboratory measurement are conducted to characterize the adsorption-desorption process of hydrocarbon gases at various pressures in nanoporous media. The investigated media are oil-wet polymer-based spherical activated carbon (AC) beads and a crushed core sample from a gas-producing shale formation containing nanoporous kerogen structures. NMR relaxation times are used to observe the occurrence of sorption phenomena for propane and methane at room temperature under controlled pressure conditions. Results from a PVT simulation software, incorporating a novel phase equilibrium model, show very good agreement between acquired NMR data and simulation results. T₁-T₂ inversion recovery data confirm T₂ and T₁-T₂ ratio cutoff approaches to separate hydrocarbon in nano-scale pores from hydrocarbon in interparticle pores.

进行低场NMR实验室测量以表征纳米多孔介质中各种压力下烃类气体的吸附-解吸过程。研究的介质是油湿聚合物基球形活性炭（AC）珠和来自含纳米孔干酪根结构的产气页岩地层的压碎岩心样品。NMR弛豫时间用于观察室温和受控压力条件下丙烷和甲烷的吸附现象。PVT模拟软件的结果结合了新颖的相平衡模型，表明所采集的NMR数据与模拟结果之间具有很好的一致性。T ₁ - T ₂反演恢复数据确认T ₂和T ₁ - T ₂比截止法将纳米级孔中的烃与颗粒间孔中的烃分离。