FEATURES OF ELECTROLYTIC SOLUTIONS IN CLAYS
This article is devoted to the study of the clays swelling in water (fresh and distilled) and electrolyte solutions, which used aqueous solutions of soda ash Na<sub>2</sub>CO<sub>3</sub> and sodium chloride solution NaCl. Both fresh and distilled water was used as a water base for the preparation of solutions. Laboratory experiments on bentonite clay samples were carried out on an LSM2100 labware (linear swelling meter), during which it was found that the clay swelling rate is non-linear with increasing concentration of an aqueous electrolyte solution.It is established that the swelling coefficient of bentonite clay in fresh water exceeds the swelling in distilled water. In the compared time ranges of laboratory analysis with 0.5-2.0 % concentration of aqueous solutions of Na<sub>2</sub>CO<sub>3</sub> and NaCl, the rate of swelling of bentonite clay decreases with an increase in concentration this rate is non-linear. The swelling rate of pre-saturated in 1.0 % NaCl solution of clay is less than the swelling of clay saturated in fresh water.The discovered effects must be taken into account in the implementation of water impact on the reservoir and in the process of treatment of the bottomhole formation zone with chemical reagents.