Effects of Gas Hydrate Phase Transition on the Pressure Wave Velocity of Water-Oil Emulsion Flow in Pipeline Transportation Systems

QIU Yi-jie; JING Jia-qiang; KONG Xiang-wei; JING Pei-yu

doi:10.3879/j.issn.1000-0887.2014.10.010

Volume 35 Issue 10

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QIU Yi-jie, JING Jia-qiang, KONG Xiang-wei, JING Pei-yu. Effects of Gas Hydrate Phase Transition on the Pressure Wave Velocity of Water-Oil Emulsion Flow in Pipeline Transportation Systems[J]. Applied Mathematics and Mechanics, 2014, 35(10): 1151-1162. doi: 10.3879/j.issn.1000-0887.2014.10.010

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Effects of Gas Hydrate Phase Transition on the Pressure Wave Velocity of Water-Oil Emulsion Flow in Pipeline Transportation Systems

doi: 10.3879/j.issn.1000-0887.2014.10.010

¹State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University), Chengdu 610500, P.R.China;²Province Key Laboratory of Oil and Gas Fire Protection, Southwest Petroleum University,Chengdu 610500, P.R.China;³School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, P.R.China

Funds: The National Natural Science Foundation of China(General Program)(51074136)

Received Date: 2014-04-02
Rev Recd Date: 2014-09-07
Publish Date: 2014-10-15

Abstract

Abstract

The pressure wave velocity equation for water-oil emulsion flow with gas hydrate in pipeline transportation systems was established in view of gas hydrate phase transition, compressibility of oil phase, influence of angular frequency, virtual mass force and system temperature and pressure. The results show that the gas hydrate has great influences on the pressure wave velocity of the water-oil system during pipeline transportation. In the gas hydrate decomposition region, the emergence of gas increases the compressibility of the system significantly. As a result, the pressure wave velocity falls rapidly. In the gas hydrate formation region, the compressibility of the system decreases, while the pressure wave velocity rises on the contrary. The pressure, temperature, oil-water ratio, density of oil phase, and pipe diameter all have distinct impact on the pressure wave velocity. The pressure wave velocity shows a falling tendency with the decrease of oil-water ratio, pipe diameter and temperature. A rising tendency of the pressure wave velocity occurs with the increase of pressure and density of oil phase. The pressure and temperature have effects on the hydrate decomposition rate, in turn influence the pressure wave velocity.
- gas hydrate,
- water-oil emulsion,
- pressure wave velocity,
- hydrate decomposition,
- pipeline transportation

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References(16)

References

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