The Effect of Crude Oil Stripped by Surfactant Action and Fluid Free Motion Characteristics in Porous Medium
Abstract
:1. Introduction
2. Results and Discussion
2.1. Motion Characteristics of Crude Oil in Porous Medium under Spontaneous Imbibition
2.1.1. Effect of Interfacial Tension on Crude Oil Flow
2.1.2. Effect of Viscosity on Crude Oil Flow
2.2. Factors Affecting Stripping Efficiency of Crude Oil
2.2.1. Effect of Surfactant Types on Oil-Stripping Efficiency
2.2.2. Effect of Temperature on Oil-Stripping Efficiency
2.2.3. Effect of Fluid–Rock Interface Properties on Oil Stripping Efficiency
3. Theory and Experiment
3.1. Theory
- Fluid flow does not involve heat transfer;
- The viscosity of the oil and water remains constant during the flow;
- The rock surface is required to not adsorb the fluid;
- The effect of the surfactant structure on the interfacial tension between oil and water is not taken into account.
3.2. Experiment
3.2.1. Materials and Reagents
3.2.2. Oil-Stripping Efficiency Experiment
- (1)
- Quartz sand was combined in a 1:6 ratios with crude oil and aged for 24 h at 60 °C;
- (2)
- Deionized water was combined with the surfactant solution, which had a mass concentration of 0.2%;
- (3)
- The centrifuge tube was filled with the oil sand (m1 = 15 g), and the surfactant was added at a mass ratio of 1:2 to the oil sand. The samples were placed in a centrifuge, which compressed the oil sand and produced the effect of a static stripping test;
- (4)
- Once the oil sand was filtered through the centrifuge tube in Step 3, it was encased and desiccated for a duration of 24 h in an oven;
- (5)
- In step 4, the oil sand was weighed, and Equation (5) was used to determine the oil-stripping efficiency.
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
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Cheng, Q.; Cao, G.; Bai, Y.; Liu, Y. The Effect of Crude Oil Stripped by Surfactant Action and Fluid Free Motion Characteristics in Porous Medium. Molecules 2024, 29, 288. https://doi.org/10.3390/molecules29020288
Cheng Q, Cao G, Bai Y, Liu Y. The Effect of Crude Oil Stripped by Surfactant Action and Fluid Free Motion Characteristics in Porous Medium. Molecules. 2024; 29(2):288. https://doi.org/10.3390/molecules29020288
Chicago/Turabian StyleCheng, Qingchao, Guangsheng Cao, Yujie Bai, and Ying Liu. 2024. "The Effect of Crude Oil Stripped by Surfactant Action and Fluid Free Motion Characteristics in Porous Medium" Molecules 29, no. 2: 288. https://doi.org/10.3390/molecules29020288