NDLI: Optimization of huff-n-puff gas injection in shale oil reservoirs

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Optimization of huff-n-puff gas injection in shale oil reservoirs

Content Provider	Directory of Open Access Journals (DOAJ)
Author	James J. Sheng
Abstract	Earlier studies show that huff-n-puff injection is preferred to continuous gas flooding to improve liquid oil production in shale oil reservoirs. Compared to gas flooding, huff-n-puff has more operational parameters to optimize so that liquid oil production can be maximized. This paper is to discuss the optimum huff-n-puff times, number of cycles and soaking time under practical operational and reservoir conditions. The operational and reservoir conditions dictate the maximum injection and production rates, and the maximum injection pressure and minimum production pressure.The numerical simulation results and discussions show that the optimum huff time is so long that the pressure near the wellbore reaches the set maximum injection pressure during the huff period; and the optimum puff time is the time required for the pressure near the wellbore to reach the set minimum production pressure during the puff period. The benefits of soaking may not compensate the loss in injection and production due to the time lost in the soaking period. Therefore, soaking may not be necessary during the huff-n-puff gas injection in shale oil reservoirs. The number of huff-n-puff cycles is determined when an economic rate cut-off is reached.
Related Links	http://www.sciencedirect.com/science/article/pii/S2405656116302541
ISSN	24056561
DOI	10.1016/j.petlm.2017.03.004
Journal	Petroleum
Issue Number	4
Volume Number	3
e-ISSN	24055816
Language	English
Publisher	KeAi Communications Co., Ltd.
Publisher Date	2017-01-01
Publisher Place	China
Access Restriction	Open
Subject Keyword	Petroleum Refining. Petroleum Products Engineering Geology. Rock Mechanics. Soil Mechanics. Underground Construction Petroleum refining. Petroleum products Engineering geology. Rock mechanics. Soil mechanics. Underground construction Geology
Content Type	Text
Resource Type	Article
Subject	Geology Geochemistry and Petrology Fuel Technology Energy Engineering and Power Technology Geotechnical Engineering and Engineering Geology

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