Experimental study on the influencing factors and pore production law of CO₂ huff-and-puff in tight sandstone reservoirs.

ABSTRACT: In order to determine the influence of different factors on the CO₂ huff-and-puff displacement effect, a CO₂ huff-and-puff experiment was carried out with Chang 6 tight sandstone samples in Ordos Basin as the research object. Combined with nuclear magnetic resonance technology, the influences of injection pressure, cycle numbers and soaking time on the CO₂ huff-and-puff effect were evaluated, and the optimal CO₂ huff-and-puff parameters were optimized. The microscopic degree of crude oil production in different scale pores was quantitatively characterized. The results show that the injection pressure and the cycle numbers have a significant influence on the effect of CO₂ huff-and-puff. With the increase of injection pressure, huff-and-

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC11775222 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature