A model for predicting gas well performance of free gas zone beneath hydrate layer

doi:10.1016/j.petrol.2010.01.012

GIEC OpenIR > 中国科学院广州能源研究所

	A model for predicting gas well performance of free gas zone beneath hydrate layer
	Su, Z.1,2; Cao, Y.1,3; Wu, N.1,2
	2010-04-01
发表期刊	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
卷号	71 期号:3-4 页码:179-186
摘要	Free gas beneath hydrate is an important natural gas resource and may be more feasible to exploit than dispersed hydrate of low hydrate saturation. Here we construct a single well production model of subhydrate free gas in which pressure and pressure gradient at any node of a finite element are expressed by gas density and density increment at the point. The model is used to predict the reservoir pressure and cumulative production by depressurization from a single vertical well. Gas production capacity correlates with well fluid pressure, gas saturation, permeability, and of course exploitation time. The model is tested by using the production data from the Dako trial reservoir tests. The simulation shows that gas production rate is almost constant over the course of production (e.g., there is very little decline) in the case of a 100% gas reservoir. The numerical computation also indicates that the free gas reservoir beneath the hydrates at the Blake Ridge may be of economic value for industry production. For a 69 m thick gas reservoir with 20% gas saturation, 8.65 x 10(8) m(3) (similar to 618 thousand tons) of gas can be extracted within 10 years for a permeability of 10 mD, and the mass fraction of the gas in the fluids produced at the well during production period is 46%. (C) 2010 Elsevier B.V. All rights reserved.
文章类型	Article
关键词	Free Gas Zone Gas Production Numerical Simulation Blake Ridge
WOS标题词	Science & Technology ; Technology
DOI	10.1016/j.petrol.2010.01.012
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	CONSTRAINTS ; SEDIMENTS
收录类别	SCI ; ISTP
语种	英语
WOS类目	Energy & Fuels ; Engineering, Petroleum
WOS记录号	WOS:000277650000012
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/10330
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Su, Z.,Cao, Y.,Wu, N.. A model for predicting gas well performance of free gas zone beneath hydrate layer[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2010,71(3-4):179-186.
APA	Su, Z.,Cao, Y.,&Wu, N..(2010).A model for predicting gas well performance of free gas zone beneath hydrate layer.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,71(3-4),179-186.
MLA	Su, Z.,et al."A model for predicting gas well performance of free gas zone beneath hydrate layer".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 71.3-4(2010):179-186.