Effect of pressure, temperature, and mass fraction of CO₂ on the state of the resin in crude oil

ABSTRACT

This paper focus on the main influence factors (temperature, pressure, and mass fraction of CO₂) on the state of resin in the crude oil during CO₂ flooding by using a visualization method. The state of resin is not affected by the variation of the temperature. Only when the pressure is increased to a certain value, the state of resin can be affected by the variation of the pressure. During the variation of the mass fraction of CO₂, the state of the resin has a significant change, including the growth out of nothing, expansion from small to large, and transformation from a adsorbed solid to a flowable liquid. During the actual application process of CO₂ flooding in oilfield, the influence of the temperature can be ignored, the appropriate mass fraction of CO₂ is below 30% and the gas injection pressure should maintain a relatively low value. The results can provide a theoretical basis to avoid the resin aggregation during CO₂ flooding.

KEYWORDS:

• resin
• aggregation
• pressure
• temperature
• mass fraction

Acknowledgments

This study was supported by Science and Technology Research Project of Chongqing Municipal Education Committee (No. KJ1601330).