Abstract
The experimental measurement of water retention curve in hydrate-bearing sediments is critically important to understand the behavior of hydrate dissociation and gas production. In this study, tetrahydrofuran (THF) is selected as hydrate former. The pore habit of THF hydrates is investigated by visual observation in a transparent micromodel. It is confirmed that THF hydrates are not wetting phase on the quartz surface of the micromodel and occupy either an entire pore or part of pore space resulting in change in pore size distribution. And the measurement of water retention curves in THF hydrate-bearing sediments with hydrate saturation ranging from Sh = 0 to Sh = 0.7 is conducted for excess water condition. The experimental results show that the gas entry pressure and the capillary pressure increase with increasing hydrate saturation. Based on the experimental results, fitting parameters for van Genuchten equation are suggested for different hydrate saturation conditions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4279-4287 |
| Number of pages | 9 |
| Journal | Geophysical Research Letters |
| Volume | 43 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 16 2016 |
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Keywords
- hydrate-bearing sediment
- tetrahydrofuran hydrate
- van Genuchten
- water retention curve
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
Cite this
The effect of hydrate saturation on water retention curves in hydrate-bearing sediments. / Mahabadi Mahabad, Nariman; Zheng, Xianglei; Jang, Jaewon.
In: Geophysical Research Letters, Vol. 43, No. 9, 16.05.2016, p. 4279-4287.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effect of hydrate saturation on water retention curves in hydrate-bearing sediments
AU - Mahabadi Mahabad, Nariman
AU - Zheng, Xianglei
AU - Jang, Jaewon
PY - 2016/5/16
Y1 - 2016/5/16
N2 - The experimental measurement of water retention curve in hydrate-bearing sediments is critically important to understand the behavior of hydrate dissociation and gas production. In this study, tetrahydrofuran (THF) is selected as hydrate former. The pore habit of THF hydrates is investigated by visual observation in a transparent micromodel. It is confirmed that THF hydrates are not wetting phase on the quartz surface of the micromodel and occupy either an entire pore or part of pore space resulting in change in pore size distribution. And the measurement of water retention curves in THF hydrate-bearing sediments with hydrate saturation ranging from Sh = 0 to Sh = 0.7 is conducted for excess water condition. The experimental results show that the gas entry pressure and the capillary pressure increase with increasing hydrate saturation. Based on the experimental results, fitting parameters for van Genuchten equation are suggested for different hydrate saturation conditions.
AB - The experimental measurement of water retention curve in hydrate-bearing sediments is critically important to understand the behavior of hydrate dissociation and gas production. In this study, tetrahydrofuran (THF) is selected as hydrate former. The pore habit of THF hydrates is investigated by visual observation in a transparent micromodel. It is confirmed that THF hydrates are not wetting phase on the quartz surface of the micromodel and occupy either an entire pore or part of pore space resulting in change in pore size distribution. And the measurement of water retention curves in THF hydrate-bearing sediments with hydrate saturation ranging from Sh = 0 to Sh = 0.7 is conducted for excess water condition. The experimental results show that the gas entry pressure and the capillary pressure increase with increasing hydrate saturation. Based on the experimental results, fitting parameters for van Genuchten equation are suggested for different hydrate saturation conditions.
KW - hydrate-bearing sediment
KW - tetrahydrofuran hydrate
KW - van Genuchten
KW - water retention curve
UR - http://www.scopus.com/inward/record.url?scp=84966293334&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84966293334&partnerID=8YFLogxK
U2 - 10.1002/2016GL068656
DO - 10.1002/2016GL068656
M3 - Article
AN - SCOPUS:84966293334
VL - 43
SP - 4279
EP - 4287
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 9
ER -