Energy Storage Science and Technology ›› 2017, Vol. 6 ›› Issue (4): 789-798.doi: 10.12028/j.issn.2095-4239.2017.0093

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An experiment investigation into the effect of particle properties on natural gas hydrate sediments#br#

LIU Yanjun, DONG Mengyang, JIANG Leilei, LI Wen, HUANG Zhiqiang   

  1. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China
  • Received:2017-05-30 Revised:2017-06-10 Online:2017-07-01 Published:2017-07-01

Abstract: This paper concerns the fundamental properties of quartz sand and brown alumina particles as natural gas hydrate media by using a laboratory gas hydrate and sediment instrument, SHW-III. We measured the electrical resistance, sound propagation speed, compressibility under two pore saturation conditions of 60% and 80%. The results showed little effects of the types of particles on the natural gas hydrate sediment resistance. Given particle size, the higher the porosity of the sediment, the faster the velocity of sound propagation; the velocity of sound propagation, however, increased with increasing particle size for the same type of sediment. In addition, cementation resistance of the gas hydrate deposits increased gradually with decreasing size of the sediment particles or increasing pore saturation. An empirical relationship was obtained through data fitting for the sound propagation of gas hydrate sediments as a function of particle size over a range of 0.42~1.8 mm for 60% and 80% pore saturations.

Key words:  natural gas hydrate sediments, pore saturation, acoustic wave velocity, the dynamic mechanical parameters