Improving the economic efficiency of involving hard-to-recover reserves by optimizing the number of stages in multi-stage hydraulic fracturing

UDK: 622.276.66СГ

DOI: 10.24887/0028-2448-2025-9-61-65

Key words: field development, hydraulic fracturing, economic efficiency, low-permeability formations, hard-to-recover reserves

Authors: V.A. Grishchenko (Gazprom Neft Companу Group, RF, Saint Petersburg; Ufa State Petroleum Technological University, RF, Ufa); A.N. Shishlyannikov(Gazprom Neft Companу Group, RF, Saint Petersburg);1 D.A. Ishchuk (Gazprom Neft Companу Group, RF, Saint Petersburg); N.Yu. Chumichev (Gazprom Neft Companу Group, RF, Saint Petersburg); R.A. Dmitriev (Gazprom Neft Companу Group, RF, Saint Petersburg); N.V. Chebykin (Gazprom Neft Companу Group, RF, Saint Petersburg)

The paper is devoted to the issue of determining the optimal number of stages in multistage hydraulic fracturing (HF) in the process of developing reservoirs with low filtration-capacitive properties. The objects of the study are terrigenous strata of the field located in the West Siberian oil and gas province. The issue of finding the critical maximum distance between HF ports is considered which enables the efficient involvement of reserves in development. The study methods are statistical analysis of the actual dynamics of production wells and a combination of calculated results on a HF simulator with subsequent hydrodynamic modeling. To increase the reliability of the analysis results, groups were formed consisting of wells located in similar geological conditions, without significant differences in completion methods and without complications in the process of drilling, development and subsequent operation over the analyzed time period. The statistical analysis compared the general approach to the placement of hydraulic fracturing ports with an approximate distance of 125 m between ports with wells completed with a distance between ports of at least 160 m. For many wells, increasing the interport distance did not lead to a deterioration in the indicators relative to the general approach, which enables expanding the potential for optimizing costs during well construction. Similar results were obtained based on the modeling of one of the sections. One of the possible criteria for increasing the distance between ports is the permeability of the formation, which affects the efficiency of well operation within the considered comparison.

References

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(In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 12, pp. 46-48, DOI: https://doi.org/10.24887/0028-2448-2017-12-46-48