A numerical simulator describing foam generation, coalescence and migration during the process of foam flooding in porous media was developed based on the established mathematical model. Taking the pilot test area of foam flooding in west block of Chengdong Oilfield as an example, this paper analyzes the rate distribution and influential factors of foam generation, natural coalescence and oil-contacting coalescence in each grid by using the numerical simulator. The results show that foam generation rate increased with average permeability, gas saturation and foam mole fraction in gas phase, while it decreased with increasing oil saturation. Natural coalescence rate increased with average permeability, gas saturation, oil saturation and foam mole fraction in gas phase. Oil-contacting coalescence rate increased with oil saturation and foam mole fraction in gas phase.

foam flooding  /  seepage  /  generation rate  /  coalescence rate  /  mathematical model