Zhanabayev T.А., Igembayev I.B., Tulepbergenov А.Т.

Abstract. The article is devoted to improving the quality of well construction by ensuring the stability and integrity of the wellbore by treating the washing liquids with chemical reagents and new generation polymers. The reasons leading to the disturbance of the stability of the walls of the wells in the oil and gas fields of Kazakhstan were investigated, and the requirements for drilling muds for drilling in unstable rocks were formed.     According to the results of the research, it is determined that one of the ways to increase the stability of the walls of the well is to regulate the composition and technological properties of drilling fluids. Analysis of the experience of well construction in potentially unstable weakly cemented clay rocks has shown that the intensity of cavern formation can be significantly reduced by using inhibiting additives of different mechanism of action, which is proved by carrying out laboratory studies on a polymer polymer inhibited polymer solution based on polymer Reolon SP36. The article reflects recommendations on the use of a new composition solution for the construction of oil and gas and geotechnological wells in the Republic of Kazakhstan and other oil regions of the near abroad with complex geological and technical drilling conditions.
Key words: polymer, drilling mud, wall stability, unstable rocks, drilling, chemical reagents.

МРНТИ 52.47.15, №2(2018г.)