WASTE-BASED DRILLING FLUIDS FOR DRILLING WELLS IN DIFFICULT CONDITIONS

The problem of improving the efficiency and quality of drilling operations involves the discovery of new oil and gas-bearing territories and the development of ever greater depths in known areas. Drilling wells to great depths, as a rule, is associated with significant difficulties caused by the complication of mining and geological conditions, which, first of all, include intervals with abnormally high and low fluid pressures. Drilling wells in complicated conditions requires the use of appropriate drilling fluids. Modern drilling fluids are expensive, multicomponent systems with a high content of various expensive chemicals and materials. One of the main problems that specialists face when drilling is the absorption of drilling fluids, loss of stability of the borehole. Therefore, when choosing the composition and parameters of drilling fluids, an assessment of the geological conditions where the well drilling process is carried out is first carried out. It is known that the geological conditions of drilling are a complex system in which various factors are present, and therefore the choice of a particular composition and technology represents a decision-making procedure under conditions of uncertainty. In this regard, conducting experimental research, obtaining, analyzing information and making decisions under these conditions are of interest, which justifies the formulation of research objectives.