Investigating the thermal effects on hydraulic fracturing propagation and response of numerical models

Document Type : Original Article

Authors

1 School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran

2 Faculty of Mining and Metallurgical Engineering, University of Yazd, Yazd,, Iran.

Abstract

Ignoring thermal effects in many applications of geomechanics including hydraulic fracturing of deep oil and gas reservoirs and geothermal energy extraction may result in significant errors in output. Production and stimulation of unconventional oil and gas reservoirs is highly dependent on performance of hydraulic fracturing (HF) jobs. These jobs create a network of fractures which are responsible for elevated hydraulic conductivity of the reservoir formation around the wellbore. The fractures increase inflow of hydrocarbons into the wellbore especially in low permeability reservoirs. A sound understanding of HF’s behavior and its relation to the increased production rate, decreases high costs of HF jobs. Thermal effects on HF propagation and mechanism are studied in this paper using the displacement discontinuity method. ّFirstly, the thermal effects on a thermoelastic model with a thermal source was studied. Models showed that boundaries of the geometrical model should be place farther from what was expected in elastic analyses to avoid boundary effects. The thermal effects were observed far away from the thermal source in the models.Then, thermal effects on a hydraulic fracture was modeled. It was shown that using a cold fluid for HF can decrease the required HF pressure for propagation. The HF width was also increased compared to an elastic model. This is an important parameter in determining hydraulic conductivity of the formation. The lower required pressure for HF propagation reduces the cost of equipment needed for the job, since they are not required to work at very high pressures.

Keywords

References

[1] Q. Bai, Z. Liu, C. Zhang, F. Wang, Geometry nature of hydraulic fracture propagation from oriented perforations and implications for directional hydraulic fracturing, Comput. Geotech. 125 (2020). doi:10.1016/j.compgeo.2020.103682.
[2] N. Makedonska, S. Karra, H.S. Viswanathan, G.D. Guthrie, Role of interaction between hydraulic and natural fractures on production, J. Nat. Gas Sci. Eng. 82 (2020). doi:10.1016/j.jngse.2020.103451.
[3] S. Wang, D. Li, H. Mitri, H. Li, Numerical simulation of hydraulic fracture deflection influenced by slotted directional boreholes using XFEM with a modified rock fracture energy model, J. Pet. Sci. Eng. 193 (2020). doi:10.1016/j.petrol.2020.107375.
[4] C. Sun, H. Zheng, W. David Liu, H. Ma, Study on dynamic propagation of hydraulic fractures in enhanced thermal reservoir, Eng. Fract. Mech. 236 (2020). doi:10.1016/j.engfracmech.2020.107207.
[5] A. Abdollahipour, M. Fatehi Marji, A.R. Yarahmadi-Bafghi, A fracture mechanics concept of in-situ stress measurement by hydraulic fracturing test, in: 6th Int. Symp. In-Situ Rock Stress, ISRM, Japan, 2013.
[6] A. Abdollahipour, M. Fatehi Marji, A. Yarahmadi-Bafghi, J. Gholamnejad, A. Yarahmadi Bafghi, J. Gholamnejad, Simulating the propagation of hydraulic fractures from a circular wellbore using the Displacement Discontinuity Method, Int. J. Rock Mech. Min. Sci. 80 (2015) 281–291. doi:10.1016/j.ijrmms.2015.10.004.
[7] M. Fatehi-Marji, A. Abdollahipour, A. Yarhamadi-Bafghi, J. Gholamnejad, Analysis of geometrical parameters of hydraulic fracturing in horizontal oil wells stimulation, in: 2016.
[8] A. Abdollahipour, M. Fatehi-Marji, H. Soltanian, E.A. Kazemzadeh, M.F. Marji, H. Soltanian, E.A. Kazemzadeh, Behavior of a hydraulic fracture in permeable formations, J. Min. Environ. 9 (2018). doi:10.22044/jme.2018.6129.1428.
[9] A. Abdollahipour, M. Fatehi-Marji, M. Behnia, H. Soltanian, Using well tests in order to evaluate affecting parameters in hydraulic fracturing design, in: 2ndNational Conf. Pet. Geomech., National Iranian Oil Company, Tehran, Iran, 2017.
[10] M.Y. Wu, D.M. Zhang, W.S. Wang, M.H. Li, S.M. Liu, J. Lu, H. Gao, Numerical simulation of hydraulic fracturing based on two-dimensional surface fracture morphology reconstruction and combined finite-discrete element method, J. Nat. Gas Sci. Eng. 82 (2020). doi:10.1016/j.jngse.2020.103479.
[11] I. Tomac, M. Gutierrez, Coupled hydro-thermo-mechanical modeling of hydraulic fracturing in quasi-brittle rocks using BPM-DEM, J. Rock Mech. Geotech. Eng. 9 (2017) 92–104. doi:10.1016/j.jrmge.2016.10.001.
[12] H. Slatlem Vik, S. Salimzadeh, H.M. Nick, Heat recovery from multiple-fracture enhanced geothermal systems: The effect of thermoelastic fracture interactions, Renew. Energy. 121 (2018) 606–622. doi:10.1016/j.renene.2018.01.039.
[13] A. Ghassemi, A. Nygren, A. Cheng, Effects of heat extraction on fracture aperture: A poro-thermoelastic analysis, Geothermics. 37 (2008) 525–539. doi:10.1016/j.geothermics.2008.06.001.
[14] G. Stephens, B. Voight, Hydraulic fracturing theory for conditions of thermal stress, Int. J. Rock. Mech., Min. Sci. Geomech. 19 (1982) 279–284.
[15] W. Nowacki, Thermoelasticity, Pergamon Press, England, 1962.
[16] Y.X. Mukherjee, K. Shah, S. Mukherjee, Thermoelastic fracture mechanics with regularized hypersingular boundary integral equations, Eng. Anal. Bound. Elem. 23 (1999) 89–96. http://www.sciencedirect.com/science/article/pii/S0955799798000642.
[17] Y. Wang, E. Papamichos, Conductive Heat Flow and Thermally Induced Fluid Flow around a Well Bore in a Poroelastic Medium, Water Resour. Res. 30 (1994) 3375–3384.
[18] B. Bai, One-dimensional thermal consolidation characteristics of geotechnical media under non-isothermal condition, Eng. Mech. 22 (2005) 186e91;(in Chinese).
[19] M.B. Dusseault, Stress changes in thermal operations, in: SPE Int. Therm. Oper. Symp., Society of Petroleum Engineers, Bakersfield, California, 1993: p. SPE-25809-MS.
[20] M. Lak, M. Fatehi Marji, A. Yarahmadi Bafghi, A. Abdollahipour, A coupled finite difference-boundary element method for modeling the propagation of explosion-induced radial cracks around a wellbore, J. Nat. Gas Sci. Eng. (2019) 41–51. doi:10.1016/j.jngse.2019.01.019.
[21] B. Carrier, S. Granet, Numerical modeling of hydraulic fracture problem in permeable medium using cohesive zone model, Eng. Fract. Mech. 79 (2012) 312–328.
[22] R. Liu, Y. Jiang, B. Li, X. Wang, A fractal model for characterizing fluid flow in fractured rock masses based on randomly distributed rock fracture networks, Comput. Geotech. 65 (2015) 45–55. doi:10.1016/j.compgeo.2014.11.004.
[23] A. Abdollahipour, M. Fatehi Marji, A. Yarahmadi Bafghi, J. Gholamnejad, A. Yarahmadi-Bafghi, J. Gholamnejad, No Title, 2016.
[24] H. Yousefian, H. Soltanian, M. Fatehi Marji, A. Abdollahipour, Y. Pourmazaheri, M.F. Marji, A. Abdollahipour, Y. Pourmazaheri, Numerical simulation of a wellbore stability in an Iranian oilfield utilizing core data, J. Pet. Sci. Eng. 168 (2018) 577–592.
[25] A. Abdollahipour, Crack propagation mechanism in hydraulic fracturing procedure in oil reservoirs, University of Yazd, 2015.
[26] A. Abdollahipour, M. Fatehi Marji, A. Yarahmadi Bafghi, J. Gholamnejad, A complete formulation of an indirect boundary element method for poroelastic rocks, Comput. Geotech. 74 (2016) 15–25. doi:10.1016/j.compgeo.2015.12.011.
[27] Y. Wang, M.B. Dusseault, A coupled conductive-convective thermo-poroelastic solution and implications for wellbore stability, J. Pet. Sci. Eng. 38 (2003) 187–198.
[28] J. Taylor, S. Bryant, Quantifying thermally driven fracture geometry during CO2 storage, in: Energy Procedia, Elsevier Ltd, 2014: pp. 3390–3404. doi:10.1016/j.egypro.2014.11.368.
[29] A. Abdollahipour, M. Fatehi-Marji, A thermo-hydromechanical displacement discontinuity method to model fractures in high-pressure, high-temperature environments, Renew. Energye. 153 (2020) 1488–1503.
[30] V. V Palciauskas, P.A. Domenico, Characterization of Drained and Undrained Response of Thermally Loaded Repository Rocks, Water Resour. Res. 18 (1982) 281–290.
[31] M.A. Biot, General theory of three-dimensional consolidation, J. Appl. Phys. 12 (1941) 155–164.
[32] D.F. McTigue, Thermoelastic Response of Fluid-saturated Porous Rock, J. Geophys. Res. 91 (1986) 9533–9542.
[33] O. Coussy, Thermoporoelastic response of a borehole, Transp. Porous Media. 21 (1991) 121–146.
[34] M. Kurashige, A thermoelastic theory of fluid-filled porous materials, Int. J. Solids Struct. 25 (1989) 1039–1052.
[35] Y. Ohnishi, A. Kobayashi, Thermal-hydraulic-mechanical coupling analysis of rock mass, in: J. Hudson (Ed.), Anal. Des. Methods, Pergamon Press, Oxford, England, 1993: pp. 191–208.
[36] P.T. Delaney, Rapid Intrusion of Magma into Wet Rock: Groundwater Flow Due to Pore Pressure Increases, J. Geophys. Res. 87 (1982) 7739–7756.
[37] P.C. Paris, F. Erdogan, A critical analysis of crack propagation laws, J. Basic Eng. 85 (1960) 528–534.
[38] A. Abdollahipour, M.F. Marji, M. Fatehi Marji, Analyses of Inclined Cracks Neighboring Two Iso-Path Cracks in Rock-Like Specimens Under Compression, Geotech. Geol. Eng. 35 (2017) 169–181. doi:10.1007/s10706-016-0095-6.
[39] A. Abdollahipour, H. Soltanian, Y. Pourmazaheri, E. Kazemzadeh, M. Fatehi-Marji, Sensitivity analysis of geomechanical parameters affecting a wellbore stability, J. Cent. South Univ. 26 (2019) 768–778. doi:10.1007/s11771-019-4046-2.
Journal of Petroleum Geomechanics
Volume 4, Issue 1
June 2021
Pages 43-52

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