REACTION-DIFFUSION EQUATION FOR CONTAMINANT ION FLOW USING POINT-SOURCE APPROXIMATION.

We developed a new model for fluid movement around the wellbore by introducing a Dirac function, which simplifies a water-injection well as a point source. The effect of porosity on the reaction and diffusion of contaminant ions is also taken into account in the model, making it more reliable in theoretical prediction. [ABSTRACT FROM AUTHOR]