METHOD FOR ASSESSING THE CHANGE IN THE PERMEABILITY OF THE BOTTOMHOLE FORMATION ZONE Russian patent published in 2023 - IPC G01N7/10 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in the development and operation of deposits, in monitoring the production of well products, designing and creating formulations of drilling fluids and process fluids used in the field of construction and repair of hydrocarbon production wells. The method for assessing the change in the bottomhole formation zone permeability consists in creating a physical filtration model of the bottomhole formation zone using core material and samples of formation fluid, drilling fluid or process fluids and then using a special filtration unit to evaluate the coefficient of rock permeability change according to the well-known Darcy linear filtration law due to pollution of the pore space after their impact according to the indicated dependence (1).

EFFECT: increased reliability of the assessment of changes in the permeability of rocks under the influence of drilling fluids and process fluids used in the construction and repair of wells.

1 cl, 3 tbl, 6 dwg