ABSTRACT
For retention of the leading positions of Russia in the oil and gas sector it is necessary to support production growth. It can be reached due to use of new technologies in the field of drilling wells in difficult mining-and-geological conditions. There can be various problems connected with instability of rock in borehole during of construction of wells.This problem often arises during the drilling process in shales, one of the widespread rock of the most part of fields of the world. Ensuring stability of shales in a borehole is the difficult task demanding a good technological equipment and wide experience of employees. As a result of research, drilling mud which provides stability of borehole during drilling process in shales was developed. The positive effect of the developed drilling mud is reached due to a combination of the inhibiting reagents which allow to lower extent of interaction of the dispersive environment of drilling mud and the breeds composing well walls.
