Justification of the formulation of modified drilling mud for the construction of the transport part of wells with a horizontal termination in the fields of the north of Western Siberia

Abstract

The article considers the rationale for the formulation of an inhibitory clay-free drilling mud, including a complex reagent Polysil Potassium and CLSP for the conditions of deposits in the regions of Western Siberia. By the method of the planned experiment, the main equations of the main indicators (factors) of the studied drilling mud are obtained. According to the obtained dependencies, the concentrations of these reagents are selected, taking into account the specified parameters (FL = (up to 6) ml3/30 min, PV = (10-30) sP, YP = (80-150) dPa). In this paper, the results of regression analysis are carried out, with the help of which the dependences of the influence of the concentrations of the Polysil Potassium composition and pitch carbolignosulfonate on the properties of a clay-free water-based drilling mud are constructed. The regression analysis of drilling mud formulations has established that in order to maintain optimal technological parameters of sludge transport during drilling in the temperature range from 25 to 160 °C, the optimal ones are: the content of Polysil Potassium is 2.5%, CLSP is not more than 3%. This optimized system has a low dispersing capacity and satisfactory filtration and rheological characteristics. Keywords: composition optimization; regression equation; inhibiting drilling fluids; complex reagents.