Characteristics Analysis of Multiphase Flow in Annulus in Natural Gas Hydrate Reservoir Drilling

DOI

10.2991/ifeesm-15.2015.75How to use a DOI?

Keywords

hydrate; decomposition; multiphase flow; characteristics analysis

Abstract

During the process of natural gas hydrate drilling, hydrate cuttings will decompose at a certain position, which promotes the formation of complex multiphase flow in annulus. Aiming at this, dynamic model of hydrate mass transfer decomposition is established considering temperature and pressure. On the basis of this, multiphase flow coupling model is got under gas-liquid-solid complex media with non-equilibrium phase transformation during natural gas hydrate drilling. Finally, numerical simulation method is used to analyze critical point for hydrate decomposition and variation laws of multiphase flow in annulus under different operation parameters. The result shows that high delivery rate and density of drilling mud will restrain decomposition of hydrate, and high rate of penetration will promote that, which provides important theoretical basis for downhole safety control.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Na Wei
AU  - An-tong Sun
AU  - Yong-jie Li
AU  - Ying-feng Meng
AU  - Gao Li
AU  - Ping Guo
AU  - An-qi Liu
PY  - 2015/09
DA  - 2015/09
TI  - Characteristics Analysis of Multiphase Flow in Annulus in Natural Gas Hydrate Reservoir Drilling
BT  - Proceedings of the 2015 International Forum on Energy, Environment Science and Materials
PB  - Atlantis Press
SP  - 396
EP  - 400
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-15.2015.75
DO  - 10.2991/ifeesm-15.2015.75
ID  - Wei2015/09
ER  -