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

Sheng, James J.

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

Patent · Tue May 16 00:00:00 EDT 2023

OSTI ID:1998389

Sheng, James J.

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.

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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

Resource Relation:: Patent File Date: 04/02/2021

Country of Publication:: United States

Language:: English

References (28)

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