Abstract
Water flooding is widely used to enhance oil recovery in the oilfield. Advanced water injection technology has proven to be an effective method of development for these low permeability reservoirs....
Highlights
More and more enhanced oil recovery (EOR) technologies are applied in the oilfield to improve well production, such as chemical flooding, steam flooding, and polymer flooding
Because the wettability can be changed by a polymer from oil-wet to water-wet, the displacement efficiency of polymer flooding is stronger than water flooding.[6]
The model proposed in this article is derived from flow equation and the threshold pressure gradient is taken into account, which reflects the fluid flow characteristic in low-permeability reservoirs
Summary
More and more enhanced oil recovery (EOR) technologies are applied in the oilfield to improve well production, such as chemical flooding, steam flooding, and polymer flooding. The model proposed in this article is derived from flow equation and the threshold pressure gradient is taken into account, which reflects the fluid flow characteristic in low-permeability reservoirs. On the contrary, this model can consider the effect of well types. When the threshold pressure gradient exists, the dimensionless mathematics model of the water-oil phase transient well test is as follows: Flow equation[32]. The Laplace solution of a fractured well is given by qffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 9 9
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