CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs

doi:10.1016/j.fuel.2015.06.092

LZUFE-KMS

	CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs
	Yu, Wei 1; Lashgari, Hamid Reza 2; Wu, Kan 1; Sepehrnoori, Kamy 2
	2015-11-01
发表期刊	FUEL
卷号	159 页码:354-363
摘要	The combination of horizontal drilling and multi-stage hydraulic fracturing have boosted the oil production from Bakken tight oil reservoirs. However, the primary oil recovery factor is very low due to the extremely tight formation, resulting in substantial volumes of oil still remaining in place. Hence, it is important to investigate the potential of applying enhanced oil recovery methods to increase oil recovery in the Bakken formation. Although carbon dioxide (CO2) is widely used in conventional reservoirs to improve oil recovery, it is a new subject and not well-understood in unconventional oil reservoirs such as the Bakken formation. In this paper, we use numerical reservoir simulation to model CO2 injection as a huff-n-puff process with typical reservoir and fracture properties from the Bakken formation. Effects of CO2 molecular diffusion, number of cycle, fracture half-length, permeability and reservoir heterogeneity on the well performance of CO2 huff-n-puff are examined in detail. The results show that the CO2 diffusion plays a significant role in improving oil recovery from tight oil reservoirs, which cannot be neglected in the reservoir simulation model. Additionally, the tight oil formation with lower permeability, longer fracture half-length, and more heterogeneity is more favorable for the CO2 huff-n-puff process. This work can provide a better understanding of the physical mechanisms and key parameters affecting the effectiveness of CO2 injection for enhanced oil recovery in the Bakken formation. (C) 2015 Elsevier Ltd. All rights reserved.
关键词	CO2 huff-n-puff Enhanced oil recovery CO2 diffusion Tight oil Bakken
DOI	10.1016/j.fuel.2015.06.092
收录类别	SCIE
ISSN	0016-2361
语种	英语
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000360006100040
出版者	ELSEVIER SCI LTD
原始文献类型	Article
引用统计	被引频次：355[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/31563
专题	兰州财经大学
作者单位	1.Texas A&M Univ, Dept Petr Engn, College Stn, TX 77843 USA; 2.Univ Texas Austin, Dept Petr & Geosyst Engn, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Yu, Wei,Lashgari, Hamid Reza,Wu, Kan,et al. CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs[J]. FUEL,2015,159:354-363.
APA	Yu, Wei,Lashgari, Hamid Reza,Wu, Kan,&Sepehrnoori, Kamy.(2015).CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs.FUEL,159,354-363.
MLA	Yu, Wei,et al."CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs".FUEL 159(2015):354-363.