Main controlling factors of re-ignition and ignition strategies in heavy oil fire flooding
LIANG Jin-zhong
LU Di
HUANG Xiao-lei
GAO Zhong-min
Abstract：In order to realize the re-ignition of the extinguished oil layer in the process of fire flooding development and ensure the fire flooding effect,such main controlling factors of re-ignition as the ignition temperature,air flux,underground oil saturation distribution in oil layer and coking zone were investigated with a series of indoor physical simulation experiments and numerical simulation calculation of oil reservoir. In addition,the reasonable ranges of ignition temperature and air flux were provided.At the same time,in combination with the scale of the underground air chamber of gas-injection well,the re-ignition strategy of the oil layer under different conditions was given.The results show that the electrical ignition temperature should be controlled at higher than 450℃,and the air flux should be maintained at more than 10 m3/(m2·h). Furthermore,for the gas-injection wells which need to be injected with fuel oil for re-ignition,the amount of fuel oil should be not less than 2/7 of the air chamber volume in the burned area.
Keywords：fire floodingre-ignitionair fluxignition temperaturephysical simulationnumerical simulationignition strategyfire extinguishing condition
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 38-42 )