Pore capillary pressure and saturation of methane hydrate bearing sediments

Sun Shicai; Liu Changling; Ye Yuguang; Liu Yufeng

doi:10.1007/s13131-014-0538-y

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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

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Pore capillary pressure and saturation of methane hydrate bearing sediments

doi: 10.1007/s13131-014-0538-y

1.
Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266510, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2.
Qingdao Institute of Marine Geology, Qingdao 266071, China
3.
Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266510, China

Received Date: 2013-05-24
Rev Recd Date: 2013-12-26

Abstract

Abstract

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.
- methane hydrate,
- equibrium,
- silica sand,
- saturation,
- pore capillary pressure

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References(38)

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