Sun Shicai, Liu Changling, Ye Yuguang, Liu Yufeng. Pore capillary pressure and saturation of methane hydrate bearing sediments[J]. Acta Oceanologica Sinica, 2014, 33(10): 30-36. doi: 10.1007/s13131-014-0538-y
Citation: Sun Shicai, Liu Changling, Ye Yuguang, Liu Yufeng. Pore capillary pressure and saturation of methane hydrate bearing sediments[J]. Acta Oceanologica Sinica, 2014, 33(10): 30-36. doi: 10.1007/s13131-014-0538-y

Pore capillary pressure and saturation of methane hydrate bearing sediments

doi: 10.1007/s13131-014-0538-y
  • Received Date: 2013-05-24
  • Rev Recd Date: 2013-12-26
  • To better understand the relationship between the pore capillary pressure and hydrate saturation in sediments, a new method was proposed. First, the phase equilibria of methane hydrate in fine-grained silica sands were measured. As to the equilibrium data, the pore capillary pressure and saturation of methane hydrate were calculated. The results showed that the phase equilibria of methane hydrates in fine-grained silica sands changed due to the depressed activity of pore water caused by the surface group and negatively charged characteristic of silica particles as well as the capillary pressure in small pores together. The capillary pressure increased with the increase of methane hydrate saturation due to the decrease of the available pore space. However, the capillary-saturation relationship could not yet be described quantitatively because of the stochastic habit of hydrate growth.
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