Analytical technique for gel treatment prediction of production and injection wells in a stratified reservoir

This paper presents a simulator and an analytical technique for analysis of a gel treatment process, in a stratified oil reservoir. Calculations were performed with multicomponent 1-D simulator in each layer of a reservoir that has the facility to describe the gelation of Na2SiO3 + CaCl2 reagent due to high reservoir temperature (temperature initiation) or/and low pH value in a porous media. Kinetics of these reactions were analyzed in experiments and kinetic constants were obtained.Simplified axial problems of reagent propagation and gelation in near well water saturated zone of a reservoir were considered. Analytical solutions of linear problems in one isolated layer were obtained and analytical technique for simulation of a gel treatment in a stratified reservoir was generated. The proposed technique was tested by a comparison with three case histories of profile improvement in injection wells using a gel treatment.