Characteristics of foam driving and profile controlling in heter0gene0us sand pack tube
Online published: 2013-10-08
In order to solve the problem of low steam sweep efficiency of heavy oil reservoir in Shengli Oilfield, foam is used as profile control agent during steam flooding. The resistance factors in heterogeneous rock （two sand pack tube in parallel having different permeability） saturated with water, the flow rate change with injection time, and the oil recovery factors by foam flooding in these rocks were measured under 90 ℃. The results show that, the foam resistance factor of foaming agent FCY increases with the permeability at the beginning and then decreases. Due to the high flowing resistance in high permeable rock, the flow rate in high permeable rock is greater then that in low permeable rock. In the condition that foam driving oil in this anisotropic rocks, the resistance in high permeable tube increases after total foam injection mount is greater than 0.85 PV, and injection pressure decreases with the permeability ratio increases. The recovery factors of high permeable tube and low permeable tube increase at the same time. But with the permeability ratio increases, the final recovery factors in high permeable tube increase and in low permeable tube decrease slowly.
ZHU Xiaomin , PAN Rong , LI Panpan , LIU Yinghui , ZHANG Shoupeng , HAN Xuefang . Characteristics of foam driving and profile controlling in heter0gene0us sand pack tube[J]. Lithologic Reservoirs, 2013 , 25(4) : 119 -123 . DOI: 10.3969/j.issn.1673-8926.2013.04.023
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