ОЦЕНКА ЭФФЕКТИВНОСТИ ПОЛИАКРИЛАМИДНЫХ ЖИДКОСТЕЙ ГИДРОРАЗРЫВА ПЛАСТА НА ОСНОВЕ PLANAR 3D-МОДЕЛЕЙ

<jats:p>Hydraulic fracturing fluid is a multi-component system designed to initiate fracturing, provide the design geometry of the fracture network in productive reservoirs, and transport proppant to target reservoir intervals without the risk of premature screening. The article presents a sci-entific justification for the use of modern fracturing fluids based on polymer systems. The key rheological properties of these polymer systems and their direct physical and chemical impact on the entire process of formation and propagation of cracks in the rock are considered. Nu-merical modeling of fracture geometry was performed using a modern specialized simulator based on the Planar3D concept, which made it possible to take into account in detail the three-dimensional stress-strain environment of the formation. The proposed hydraulic fracturing design method significantly increases the overall accuracy of predicting the length, width and height of cracks, contributing to a more efficient and reasonable choice of compositions for intensifying hydrocarbon production. The study substantiates the choice of a number of polyacrylamide liquids (PAA) in comparison with crosslinked guar systems. Numerical modeling showed that the use of PAA with an increased injection rate (7.0 m ³/min) makes it possible to form a crack with a half-length of 167 m (for guar — 72 m at 4.2 m ³/min). The effective conductivity of the crack for PAA is 266.2 mD∙m (guar — 265.7 mD∙m). The average wellhead pressure was reduced from 48.4 to 15.9 MPa (by 67%). Oil production rate after hydraulic fracturing for PAA — 12.7 m ³/day versus 9.4 m ³/day for guar, oil growth — 9.0 versus 5.7 m ³/day (58%). Thus, in the course of the study, it was proved that the large-scale introduction into the practice of hydraulic fracturing of innovative fluids based on polyacrylamide with optimal rheological parameters opens up new opportunities for the oil and gas industry. An increase in the injection rate of such systems allows not only to reduce the average wellhead pressure during technological operations, but also, due to the formation of ultra-long cracks with high conductivity, to ensure a long-term multiple increase in the productivity of produc-tion wells.</jats:p>