Abstract
At present, the numerical simulation of surfactant flooding is implemented by commercial software, which requires a lot of input data, resulting in slow calculation speed and heavy workload. So it was not suitable for surfactant flooding revovery evaluation in a large number of oilfields. This paper presents a fast evaluation model of surfactant flooding based on modification fractional flow theory. Viral expansion, interfacial tension calculation formula, and the relative permeability correction model are introduced to simulate the surfactant displacement mechanism. The simulation model is applied in a low permeability reservoir, and the simulation results are compared with the eclipse software results. Their results are similar, which show that this model presents certain reliability.
Highlights
It usually occurs that the water cut rises rapidly and the ultimate water flooding recovery rate is low
Based on the determination of interfacial tension, this paper introduced the relative permeability’s modified coefficient F, through which relative permeability was modified
This paper presents a fast evaluation model of surfactant flooding based on modification fractional flow theory
Summary
It usually occurs that the water cut rises rapidly and the ultimate water flooding recovery rate is low. This is due to the frequent continental deposits in our country's onshore oilfields and serious heterogeneity. With the deepening of the development of the old oilfield, it is more difficult to adjust and, and it is difficult to further improve the water flooding recovery. In order to further improve the recovery rate after water flooding, researchers have proposed many methods, such as steam flooding, surfactant flooding, microbial flooding and foam flooding. How to evaluate the potential of different methods to improve oil recovery has become a problem that needs to be solved
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