METHOD OF DETERMINING WATERPROOFING PROPERTIES OF CHEMICAL REAGENTS Russian patent published in 2002 - IPC

FIELD: oil and gas production. SUBSTANCE: invention aims at controlling waterproofing of solid surface of natural and man-made porous media when using waterproofing reagents. For that, aqueous electrolyte solution is filtered through porous medium specimens at constant pressure gradient between specimen "inlet" and "outlet" until stationarity of the filtration process and formation of hydrophilic ion-hydrate layer on porous medium surface are attained. Chemical reagents are placed on porous medium specimen "inlet" and their waterproofing properties are determined from their adsorption values. Aqueous electrolyte solution is then placed on specimen "inlet" and filtration is effected until stationarity of the filtration process is attained, whereupon residual waterproofing properties of reagents are jugged of from intensity and degree of restoration of ion-hydrate layer. Stationarity of filtration process and formation of hydrophilic ion-hydrate layer are controlled after flowing potential. EFFECT: increased reliability of control. 4 cl, 3 dwg, 2 tbl, 3 ex