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Method for optimization of huff-n-puff gas injection in hydrocarbon reservoirs

Patent ·
OSTI ID:1998389
Methods for optimization of liquid oil production by huff-n-puff in shale reservoirs to achieve an improved (and optimal) oil recovery factor. The process determines and utilizes the optimum huff and puff times, number of cycles and soaking time under practical operation and reservoir conditions. The huff time in the process is a period so long that the pressure near the wellbore reaches the set maximum injection pressure during the huff period. The puff time in the process is the time required for the pressure near the wellbore to reach the set minimum production pressure during the puff period. Soaking is typically not necessary during the huff-n-puff gas injection in shale oil reservoirs. The number of huff-n-puff cycles is determinable by the time in which the economic rate cut-off is reached.
Research Organization:
Texas Tech Univ., Lubbock, TX (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FE0024311
Assignee:
Texas Tech University System (Lubbock, TX)
Patent Number(s):
11,649,707
Application Number:
17/221,073
OSTI ID:
1998389
Country of Publication:
United States
Language:
English

References (16)

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CO2 Flooding the Elm Coulee Field conference April 2009
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Simulation Study of CO2 Huff-n-Puff Process in Bakken Tight Oil Reservoirs conference April 2014
Evaluation of the EOR potential of gas and water injection in shale oil reservoirs journal March 2014

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