INFLUENCE TECHNOLOGICAL PARAMETERS ON HYDRAULIC FRACTURING EFFICIENCY

Abstract

Link for citation: Khizhniak G.P., Assane Dieng.  Influence technological parameters on hydraulic fracturing efficiency. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 6, рр.120-125. In Rus. Relevance. Hydraulic fracturing in production and injection wells is one of the effective method for enhancing oil recovery, involving low-permeability zones and interlayers in the development, a mechanism for a wider coverage of productive zones by waterflooding, which makes it possible to convert part of off-balance reserves into commercial ones. According to experts, the use of hydraulic fracturing can increase the oil and gas recovery factor by 10–15 %. Currently, most of the oil fields in the Perm Territory are at the final stage of development. These fields, as a rule, are characterized by non-draining zones with residual reserves and low well flow rates. Most of the remaining reserves of the fields are concentrated in low-permeability reservoirs with a high degree of heterogeneity and difficult fluid filtration. The increase in the productivity of wells of these production facilities is achieved through the use of various geological and technical measures. The main aim: to develop a methodology for predicting the oil production rate post-frac with parameters that influence more, taking into account geological and technological characteristics of the object. Objects: Kashirskiy and Podolskiy carbonate deposits on one of the Permian fields. Methods: correlation and regression analysis. Results. The hydraulic fracturing method is widely used to increase well productivity. Unfortunately, oil flow rates obtained in practice do not always correspond to preliminary calculations. Using the example of one of the fields in the Perm Territory, a method proposed that allows estimating the initial oil production rate after hydraulic fracturing using the values of the technological parameters of productive deposits and the methods of mathematical statistics. A good agreement between model and experimental results was obtained.