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- Title
超临界CO2驱提高致密油藏采收率实验研究.
- Authors
周 翔; 周 丹; 邓家胜; 邓靖译; Ray Rui; 姜哲人
- Abstract
In view of rapid decline in oil recovery rate in the läte stage of natural depletion of tight oil reservoirs in the Mahu area, a study design of developing tight oil reservoirs with supercritical C02 displacement was put forward. The experiments on tight oil extraction with supercritical C02, minimum miscibilitv pressure and lõng core displacement were conducted to study the mechanism, development characteristics and influence factors of improving recovery efficiency of tight oil reservoirs with supercritical C02 displacement, and optimize important operating parameters such as gas injection rate and CO2 injection occasion. The experimental results show that the capacitv of light component after CO2 extraction decreased with the increase of extraction times; the gas injection rate had a greater impact on the final recovery efficiency, and the optimal gas injection rate was 0. 10 cm3/min; the minimum miscibilitv pressure of erude oil and supercritical CO2 was 34. 18 MPa; the eurrent pressure in the reservoir was the best occasion for CO2 injection. The study results plav a guiding roie in the effieient development of tight oil reservoirs.
- Publication
Special Oil & Gas Reservoirs, 2021, Vol 28, Issue 3, p118
- ISSN
1006-6535
- Publication type
Article
- DOI
10.3969/j.issn.1006-6535.2021.03.018