An Analytical Model Considering Multiple Mechanisms in Low Salinity Waterflooding
Jinze Xu
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Abstract:
In this work, we built a LSW analytical model and well validated it with the experimental data. Based on the model we have the following conclusions:
(1) Compared with conventional water flooding, the LSW at the beginning can postpone
the water breakthrough and increase the oil recovery;
(2) The LSW after the conventional waterflooding can further increase the oil recovery;
(3) An injection rate should not be larger than the maximum injection rate corresponding
to the zero critical retention concentration of attached particles; For a reservoir with
large porosity, it is easier to control the injection rate;
(4) Lower oil residual saturation caused by lower salinity benefits in oil recovery;
(5) A higher formation damage coefficient leads to lower water saturation in oil bank.