«Automation and Informatization of the fuel and energy complex»

On the change of the stress-state of the formation and its influence on hydraulic fracturing cracks

UDC: 004.942:532.546:622.02
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia

Keywords: stress-strain state, hydraulic fracturing crack, geomechanical modeling, anisotropy of horizontal stresses, bottomhole pressure

Annotation:

The authors of the article present interconnected geomechanical and hydrodynamic mathematical model for estimating the stress-strain state (SSS) of fluid-saturated reservoir, being developed, and model-based software module. The model allows for assessing changes of reservoir stress-strain state after hydraulic fracturing (HF) and the occurrence of a new fracture or in case of the well operational conditions change. The boundary elements method, which takes into account the reservoir pressure field, is used to calculate the stress-strain state. The reservoir stress-strain state changes depending on horizontal stresses anisotropy and the well operational mode are analyzed. A significant increase of the size of the principal stresses reorientation area was demonstrated in case of anisotropy with decrease as well as for injection wells. The results prove the importance of accurate determination of the main horizontal stresses and selection of the correct bottomhole pressure of injection wells when developing fields using hydraulic fracturing technology as well as when carrying out hydraulic fracturing, including the multi-stage one.

Bibliography:

1. Hubbert M.K., Willis D.G. Mechanics of Hydraulic Fracturing // Transactions of Society of Petroleum Engineers of AIME. – 1957. – Vol. 210, Issue 01. – P. 153–168. – DOI: 10.2118/686-G
2. Warpinski N.R., Teufel L.W. Influence of Geologic Discontinuities on Hydraulic Fracture Propagation (includes associated papers 17011 and 17074) // Journal of Petroleum Technology. – 1987. – Vol. 39, Issue 2. – P. 209–220. – DOI: 10.2118/13224-pa
3. Orientatsiya gorizontal'nykh napryazheniy verkhney chasti zemnoy kory v RF po dannym instrumental'nykh izmereniy v skvazhinakh / M.A. Lushev, V.A. Pavlov, E.P. Korel'skiy, A.V. Patutin // Gornyy informatsionno-analiticheskiy byulleten' (nauchno-tekhnicheskiy zhurnal). – 2017. – № 3. – S. 337–349.
4. Overpressures in the Central North Sea: implications for trap integrity and drilling safety / L. Gaarenstroom, R.A.J. Tromp, M.C. de Jong, A.M Brandenburg // Geological Society, London, Petroleum Geology Conference Series. – 1993. – Vol. 4, Issue 1. – P. 1305–1313. – DOI: 10.1144/0041305
5. Zobak M.D. Geomekhanika neftyanykh zalezhey / per. s angl. V.L. Frika. – Izhevsk: Institut komp'yuternykh issledovaniy, 2018. – XVIII, 480 s.
6. Dubinya N.V. Rekonstruktsiya profiley gorizontal'nykh napryazheniy na osnovanii skvazhinnykh issledovaniy treshchinovatosti: dis. … kand. fiz.-mat. nauk: 25.00.10. – M., 2018. – 144 s.
7. Kanevskaya R.D., Pimenov A.A. Vvedenie v neftegazovuyu geomekhaniku: uchebnoe posobie. – M.; Izhevsk: Institut komp'yuternykh issledovaniy, 2024. – 186 s.
8. Pereorientatsiya azimuta treshchiny povtornogo gidrorazryva plasta na mestorozhdeniyakh OOO "RN-Yuganskneftegaz" / I.D. Latypov, G.A. Borisov, A.M. Khaydar [i dr.] // Neftyanoe khozyaystvo. – 2011. – № 6. – S. 34–38.
9. Kanevskaya R.D., Pimenov A.A. O vozmozhnosti pereorientatsii treshchin pri provedenii mnogostadiynogo gidrorazryva plasta v gorizontal'nykh skvazhinakh // Trudy Rossiyskogo gosudarstvennogo universiteta nefti i gaza imeni I.M. Gubkina. – 2016. – № 4(285). – S. 75–83.
10. Geomekhanicheskiy analiz usloviy razvitiya treshchiny povtornogo gidrorazryva plasta / Yu.A. Kashnikov, S.G. Ashikhmin, O.Yu. Smetannikov, D.V. Shustov // Neftyanoe khozyaystvo. – 2014. – № 6. – S. 44–47.
11. Diagnostirovanie pereorientatsii treshchiny pri povtornom gidrorazryve plasta s pomoshch'yu analiza dannykh po dobyche/davleniyu i modelirovaniya v geomekhanicheskom module programmnogo kompleksa "RN-KIN" / G.F. Asalkhuzina, A.Ya. Davletbaev, A.I. Fedorov [i dr.] // Neftyanoe khozyaystvo. – 2018. – № 11. – S. 114–118. – DOI: 10.24887/0028-2448-2018-11-114-118
12. Kanevskaya R.D. Matematicheskoe modelirovanie razrabotki mestorozhdeniy nefti i gaza s primeneniem gidravlicheskogo razryva plasta. – M.: Nedra, 1999. – 212 s.
13. Krauch S., Starfild A. Metody granichnykh elementov v mekhanike tverdogo tela / per. s angl. M.A. Tleuzhanova; pod red. A.M. Lin'kova. – M.: Mir, 1987. – 328 s.