EFFECT OF MOLECULE DIFFUSION ON THE PERFORMANCE OF UNDERGROUND GAS STORAGE IN DEPLETED FRACTURED RESERVOIRS

doi:10.3863/j.issn.1000-2634.2007.03.042

西南石油大学学报(自然科学版) ›› 2007, Vol. 29 ›› Issue (3): 154-156.DOI: 10.3863/j.issn.1000-2634.2007.03.042

• 石油机械工程及其它 • Previous Articles Next Articles

EFFECT OF MOLECULE DIFFUSION ON THE PERFORMANCE OF UNDERGROUND GAS STORAGE IN DEPLETED FRACTURED RESERVOIRS

FU Yu ¹ GUO Xiao ¹ DU Zhi-min¹ et al.

(State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University,Chengdu Sichuan 610500,China),

Received:2006-03-31 Revised:1900-01-01 Online:2007-06-20 Published:2007-06-20
Contact: FU Yu

Abstract

Abstract: The flowing characteristics of depleted fractured gas/oil reservoirs are very complex, effect of gas molecule diffusion on the performance of underground gas storage is often neglected in many field applications and theoretical researche. Authors of the paper firstly induce the Fick's First Law, correct molecule diffusion coefficient in porous media and calculate gas molecule diffusion flux rate, the calculated diffusion flux rate is then substituted in Warren-Root dural pore model to develop a new fractured underground gas storage mathematical model, which effectively considers the influence of gas molecule diffusion. The case-analyzing results of the new model show that after 18 years of operation, the cumulative losing free gas quantity in the gas storage with molecule diffusing is 6% more than that without molecule diffusion, while the cumulative oil production with molecule diffusion is 1.35 times more. It proves that the gas molecule diffusion is a key factor of gas lossing in gas storage, and also, is the important machanism of improving oil recovery by gas injection.

Key words: fracture reservoir, underground gas storage, molecule diffusion, peak profiling, oil recovery

CLC Number:

TE311

FU Yu GUO Xiao DU Zhi-min et al.. EFFECT OF MOLECULE DIFFUSION ON THE PERFORMANCE OF UNDERGROUND GAS STORAGE IN DEPLETED FRACTURED RESERVOIRS[J]. 西南石油大学学报(自然科学版), 2007, 29(3): 154-156.

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EFFECT OF MOLECULE DIFFUSION ON THE PERFORMANCE OF UNDERGROUND GAS STORAGE IN DEPLETED FRACTURED RESERVOIRS

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