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Title: GROWTH OF A HYDRAULIC FRACTURE IN THE SIDETRACKED BOREHOLE
GROWTH OF A HYDRAULIC FRACTURE IN THE SIDETRACKED BOREHOLE

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Anton Azarov; Andrey Patutin
10.5593/sgem2022/1.1/s03.034
10.5593/sgem2022/1.1
1314-2704
978-619-7603-38-5
English
22
1.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Exploration and Mining
Initially developed as one of the most successful methods for stimulating hydrocarbon production, hydraulic fracturing (HF) has gradually found its application in related fields, such as underground mining. At the same time, the importance of controlling the crack propagation path increases, since the design of in-mine hydraulic fracturing is a complex technological task due to the influence of mine workings and other inseam boreholes.
When performing HF for the purpose of degassing a coal-bearing massif, there is a problem of forming a longitudinal crack in the plane of the coal seam. Such a crack makes it possible to most effectively cross natural fractures and increase the production rate of methane. To do this, HF is carried out in closely spaced parallel boreholes with the formation of a single plane of filtration. However, the approach has a significant drawback: for successful implementation of the method, the distance between wells must be sufficiently small.
In this paper, a method for creating a crack in a borehole with a sidetrack is considered and numerically investigated. Sealing of the fracturing interval is performed above the sidetracking point, which acts as a stress concentrator and promotes the onset of crack growth. As a result, a longitudinal crack propagates in the plane formed by the borehole and the sidetrack. The influence of the stress field, the properties of the medium, the free surface, as well as the direction and angle of the sidetrack on the path of the crack is studied.
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The study was supported by the Russian Science Foundation and the Government of the Novosibirsk region, project 22-27-20061, https://rscf.ru/project/22-27-20061/.
conference
https://doi.org/10.5593/sgem2022/1.1/s03.034
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
297-304
04 - 10 July, 2022
website
8421
hydraulic fracturing, numerical modeling, sidetracked borehole, crack, stress state