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水合物在沉积物中生成和分解的定量和表征对于含水合物沉积物的物理性质的研究有重要意义。基于核磁共振(NMR)技术研究了水合物在砂中的形成和分解行为,以一种简便的方式计量了孔隙空间中各组分的含量,包括气体、液态水和水合物,并确定了水合数。在水合物形成和分解过程中试样的弛豫行为并没有发生突变,此外,对于含或不含水合物的试样,平均对数T_2时间都与含水量成比例关系,直接的解释是液态水始终保持与颗粒表面的接触,弛豫主要发生在颗粒表面,表明水合物以孔隙填充或胶结的形式而不是颗粒涂层的方式存在。
The quantification and characterization of hydrate formation and decomposition in sediments is of great importance to the study of the physical properties of hydrate-bearing sediments. The formation and decomposition behavior of hydrate in sand was studied based on nuclear magnetic resonance (NMR) technique. The content of each component in pore space, including gas, liquid water and hydrate, was measured in a convenient way and the hydration number. In the process of hydrate formation and decomposition, the relaxation behavior of the sample did not change. In addition, the average logarithm T 2 time is proportional to the water content with or without hydrate, and the direct explanation is that liquid Water remains in contact with the particle surface all the time, with the relaxation mainly occurring at the particle surface, indicating that the hydrate is present in the form of pore-filling or cementing instead of particle coating.