Improved Numerical Simulation Equation Based on Heavy-oil Fire Flooding Mechanism

doi:10.3969/j.issn.1006-6535.2021.05.014

Abstract

Abstract: In order to solve the problems of complex conversion relationship between components, poor convergence and low accuracy of results during the numerical simulation of the in-situ combustion, the reaction equation was improved to heavy oil cracking and coke combustion from the perspective of fuel deposit of in-situ combustion, and a repetitive and accurate indoor experimental method for fuel deposit rate was established to calculate the deposit rate in heavy oil cracking and obtain an improved simulation equation by fitting. The results showed that the improved model was more reasonable, and the simulation results of the roughened model were basically consistent with these of indoor experimental results, as well as the temperature field, combustion front distribution and other simulation results of the encrypted classical equation model, and with this model, the high-temperature oxidation process could be described factually and the calculation time was greatly reduced. There is much for reference of the study results to the preparation of in-situ combustion scheme.

Key words: fire flooding, kinetic equation, numerical simulation, fuel deposit rate, oxidation front

CLC Number:

TE345

Wang Taichao, Zhu Guojin, Tan Xianhong, Wang Kai, Xie Haojun. Improved Numerical Simulation Equation Based on Heavy-oil Fire Flooding Mechanism[J]. Special Oil & Gas Reservoirs, 2021, 28(5): 100-106.

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