Numerical simulation of foam diversion acidizing in heterogeneous reservoirs  

作　　者：Hui Yuan Xiao Chen Nianyin Li Hongyu Zhou Yunlei Gong Yuan Wang 

机构地区：[1]Zhanjiang Branch of CNOOC(China)Co.Ltd.,Zhanjiang,China [2]State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Engineering,Southwest Petroleum University,Chengdu,China

出　　处：《Petroleum》2022年第4期516-521,共6页油气（英文）

基　　金：The work in this paper is supported by the grant from the Na-tional Natural Science Foundation of China(No.U1762107);Science and technology program of Sichuan Province(No.2019YJ0425).

摘　　要：Foam diversion acidizing can effectively solve the problem of acid distribution with severe heterogeneity between and within layers.Based on the foam diversion principle,the gas trap theory,and volume conservation principle,the foam slug diversion acidizing model was established and solved considering the change of bottomhole temperature and deviation factor of foam.The simulation results show that the change of temperature has a great influence on the diversion effect at the initial stage of injection,but a small influence at the middle and late stage.The effect of temperature on the highly permeable layer is greater than that of temperature on the low permeability layer.The deviation factor of foam is mainly controlled by temperature at the initial stage,and by pressure at the middle and late stage,and the whole process shows a downward trend,which has little influence on the diversion effect.The quasi-skin factor of gas trap is the most important parameter that influences the effect of foam diversion.The water saturation of the low permeability layer rises faster than that of the high permeability layer,and the effect of diversion is obvious.The research results have a strong guiding significance for foam diversion acidizing.

关 键 词：Foam Diversion acidizing Gas trap Temperature Deviation factor of foam 

分 类 号：TE6[石油与天然气工程—油气加工工程]