Method of synthesis of a nanoparticulate system of polyelectrolytes of charge opposed and use for the treatment of the formations geological

摘要

Synthesizing a nanoparticulate system of polyelectrolyte complex with opposite charges in an organic phase comprises mixing a first calibrated water-in-oil emulsion comprising a continuous organic phase, a liposoluble surfactant and a disperse aqueous phase containing a mixture of two oppositely charged polyelectrolytes such as anionic and cationic polymers, at a high or low pH, and a second water-in-oil emulsion comprising an acidic or basic aqueous phase, dispersed in the continuous organic phase and the liposoluble surfactant. Synthesizing a nanoparticulate system of polyelectrolyte complex with opposite charges in an organic phase comprises mixing a first calibrated water-in-oil emulsion comprising a continuous organic phase, a liposoluble surfactant and a disperse aqueous phase containing a mixture of two oppositely charged polyelectrolytes such as anionic and cationic polymers, at a high or low pH, and a second water-in-oil emulsion comprising an acidic or basic aqueous phase, dispersed in the continuous organic phase and the liposoluble surfactant, where the polyelectrolytes are optionally lightly charged and have a pH-dependent ionization rates, and if the aqueous phase is acidic, then the polyelectrolyte is a cationic polymer, and if the aqueous phase is basic, then the polyelectrolyte is an anionic polymer. An independent claim is included for treating a porous and permeable geological formation comprising preparing a composition comprising the nanoparticulate system of polycation/polyanion complex obtained by mixing the first calibrated emulsion and the second emulsion, and injecting the composition into the porous and permeable formation in which water, oil and/or gas flow.