Modeling Dynamic Behaviors of Complex Fractures in Conventional Reservoir Simulators
- Yifei Xu (University of Texas at Austin) | Wei Yu (Texas A&M University) | Kamy Sepehrnoori (University of Texas at Austin)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- August 2019
- Document Type
- Journal Paper
- 1,110 - 1,130
- 2019.Society of Petroleum Engineers
- fracture shear failure, pressure-dependent fracture conductivity, dynamic fracture behaviors, refracturing, embedded discrete fracture model
- 21 in the last 30 days
- 96 since 2007
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Field data have shown the decline of fracture conductivity during reservoir depletion. In addition, refracturing and infill drilling have recently gained much attention as efficient methods to enhance recovery in shale reservoirs. However, current approaches present difficulties in efficiently and accurately simulating such processes, especially for large-scale cases with complex hydraulic and natural fractures.
In this study, a general numerical method compatible with existing simulators is developed to model dynamic behaviors of complex fractures. The method is an extension of an embedded discrete-fracture model (EDFM). With a new set of EDFM formulations, the nonneighboring connections (NNCs) in the EDFM are treated as regular connections in traditional simulators, and the NNC transmissibility factors are linked with gridblock permeabilities. Hence, manipulating block permeabilities in simulators can conveniently control the fluid flow through fractures. Complex dynamic behaviors of hydraulic fractures and natural fractures can be investigated using this method.
The proposed methodology is implemented in a commercial reservoir simulator in a nonintrusive manner. We first present one synthetic case study in a shale-oil reservoir to verify the model accuracy and then combine the new model with field data to demonstrate its field applicability. Subsequently, four field-scale case studies with complex fractures in two and three dimensions are presented to illustrate the applicability of the method. These studies involve vertical- and horizontal-well refracturing in tight reservoirs, infill drilling, and fracture activation in a naturally fractured reservoir. The proposed approach is combined with empirical correlations and geomechanical criteria to model stress-dependent fracture conductivity and natural-fracture activation. It also shows convenience in dynamically adding new fractures or extending existing fractures during simulation. Results of these studies further confirm the significance of dynamic fracture behaviors and fracture complexity in the analysis and optimization of well performance.
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Alramahi, B. and Sundberg, M. I. 2012. Proppant Embedment and Conductivity of Hydraulic Fractures in Shales. Presented at the 46th US Rock Mechanics/Geomechanics Symposium, Chicago, 24–27 June. ARMA-2012-291.
Awada, A., Santo, M., Lougheed, D. et al. 2016. Is That Interference? A Work Flow for Identifying and Analyzing Communication Through Hydraulic Fractures in a Multiwell Pad. SPE J. 21 (5): 1554–1566. SPE-178509-PA. https://doi.org/10.2118/178509-PA.
Bachman, R. C., Sen, V., Khalmanova, D. et al. 2011. Examining the Effects of Stress Dependent Reservoir Permeability on Stimulated Horizontal Montney Gas Wells. Presented at the Canadian Unconventional Resources Conference, Calgary, 15–17 November. SPE-149331-MS. https://doi.org/10.2118/149331-MS.
Barree, R. D., Miskimins, J. L., and Svatek, K. J. 2017. Reservoir and Completion Considerations for the Refracturing of Horizontal Wells. Presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, The Woodlands, Texas, 24–26 January. SPE-184837-MS. https://doi.org/10.2118/184837-MS.
Bhardwaj, P., Hwang, J., Manchanda, R. et al. 2016. Injection Induced Fracture Propagation and Stress Reorientation in Waterflooded Reservoirs. Presented at the SPE Annual Technical Conference and Exhibition, Dubai, 26–28 September. SPE-181883-MS. https://doi.org/10.2118/181883-MS.
Bommer, P., Bayne, M., Mayerhofer, M. et al. 2017. Re-Designing From Scratch and Defending Offset Wells: Case Study of a Six-Well Bakken Zipper Project, McKenzie County, ND. Presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, The Woodlands, Texas, 24–26 January. SPE-184851-MS. https://doi.org/10.2118/184851-MS.
Clarkson, C. R., Qanbari, F., Nobakht, M. et al. 2013. Incorporating Geomechanical and Dynamic Hydraulic-Fracture-Property Changes Into Rate-Transient Analysis: Example From the Haynesville Shale. SPE Res Eval & Eng 16 (3): 303–316. SPE-162526-PA. https://doi.org/10.2118/162526-PA.
Coulter, G. R. and Menzie, D. E. 1973. The Design of Refrac Treatments for Restimulation of Subsurface Formations. Presented at the SPE Rocky Mountain Regional Meeting, Casper, Wyoming, 15–16 May. SPE-4400-MS. https://doi.org/10.2118/4400-MS.
de Araujo Cavalcante Filho, J. S. and Sepehrnoori, K. 2017. Simulation of Planar Hydraulic Fractures With Variable Conductivity Using the Embedded Discrete Fracture Model. J Pet Sci Eng 153 (May): 212–222. https://doi.org/10.1016/j.petrol.2017.03.049.
de Araujo Cavalcante Filho, J. S., Shakiba, M., Moinfar, A. et al. 2015. Implementation of a Preprocessor for Embedded Discrete Fracture Modeling in an IMPEC Compositional Reservoir Simulator. Presented at the SPE Reservoir Simulation Symposium, Houston, 23–25 February. SPE-173289-MS. https://doi.org/10.2118/173289-MS.
de Sousa Junior, L. C., dos Santos, L. O. S., de Souza Rios, V. et al. 2016. Methodology for Geomechanically Controlled Transmissibility Through Active Natural Fractures in Reservoir Simulation. J Pet Sci Eng 147 (November): 7–14. https://doi.org/10.1016/j.petrol.2016.04.040.
Garipov, T. T., Karimi-Fard, M., and Tchelpi, H. A. 2016. Discrete Fracture Model for Coupled Flow and Geomechanics. Computat Geosci 20 (1): 149–160. https://doi.org/10.1007/s10596-015-9554-z.
Gupta, J., Zielonka, M., Albert, R. A. et al. 2012. Integrated Methodology for Optimizing Development of Unconventional Gas Resources. Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 6–8 February. SPE-152224-MS. https://doi.org/10.2118/152224-MS.
Hossain, M. M., Rahman, M. K., and Rahman, S. S. 2002. A Shear Dilation Stimulation Model for Production Enhancement From Naturally Fractured Reservoirs. SPE J. 7 (2): 183–195. SPE-78355-PA. https://doi.org/10.2118/78355-PA.
Hustedt, B., Qiu, Y., Zwarts, D. et al. 2005. Modeling Water-Injection Induced Fractures in Reservoir Simulation. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, 9–12 October. SPE-95726-MS. https://doi.org/10.2118/95726-MS.
Karimi-Fard, M., Durlofsky, L. J., and Aziz, K. 2004. An Efficient Discrete-Fracture Model Applicable for General-Purpose Reservoir Simulators. SPE J. 9 (2): 227–236. SPE-88812-PA. https://doi.org/10.2118/88812-PA.
Koning, E. J. L. and Niko, H. 1985. Fractured Water-Injection Wells: A Pressure Falloff Test for Determining Fracture Dimensions. Presented at the SPE Annual Technical Conference and Exhibition, Las Vegas, Nevada, 22–26 September. SPE-14458-MS. https://doi.org/10.2118/14458-MS.
Lei, Z., Gong, B., Wang, F. et al. 2015. A Dynamic Discrete Fracture Model for Fluid Flow in Fractured Low-Permeability Reservoirs. Presented at the SPE Reservoir Characterisation and Simulation Conference and Exhibition, Abu Dhabi, 14–16 September. SPE-175554-MS. https://doi.org/10.2118/175554-MS.
Li, L. and Lee, S. H. 2008. Efficient Field-Scale Simulation of Black Oil in a Naturally Fractured Reservoir Through Discrete Fracture Networks and Homogenized Media. SPE Res Eval & Eng 11 (4): 750–758. SPE-103901-PA. https://doi.org/10.2118/103901-PA.
Marongiu-Porcu, M., Lee, D., Shan, D. et al. 2016. Advanced Modeling of Interwell-Fracturing Interference: An Eagle Ford Shale-Oil Study. SPE J. 21 (5): 1567–1582. SPE-174902-PA. https://doi.org/10.2118/174902-PA.
Moinfar, A., Sepehrnoori, K., Johns, R. T. et al. 2013. Coupled Geomechanics and Flow Simulation for an Embedded Discrete Fracture Model. Presented at the SPE Reservoir Simulation Symposium, The Woodlands, Texas, 18–20 February. SPE-163666-MS. https://doi.org/10.2118/163666-MS.
Moinfar, A., Varavei, A., Sepehrnoori, K. et al. 2014. Development of an Efficient Embedded Discrete Fracture Model for 3D Compositional Reservoir Simulation in Fractured Reservoirs. SPE J. 19 (2): 289–303. SPE-154246-PA. https://doi.org/10.2118/154246-PA.
Morales, A., Zhang, K., Gakhar, K. et al. 2016. Advanced Modeling of Interwell Fracturing Interference: An Eagle Ford Shale Oil Study–Refracturing. Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 9–11 February. SPE-179177-MS. https://doi.org/10.2118/179177-MS.
Norbeck, J. H., McClure, M. W., Lo, J. W. et al. 2015. An Embedded Fracture Modeling Framework for Simulation of Hydraulic Fracturing and Shear Stimulation. Computat Geosci 20 (1): 1–18. https://doi.org/10.1007/s10596-015-9543-2.
Panfili, P., Colin, R., Cominelli, A. et al. 2015. Efficient and Effective Field Scale Simulation of Hydraulic Fractured Wells: Methodology and Application. Presented at the SPE Reservoir Characterisation and Simulation Conference and Exhibition, Abu Dhabi, 14–16 September. SPE-175542-MS. https://doi.org/10.2118/175542-MS.
Ponting, D. K. 1989. Corner Point Geometry in Reservoir Simulation. Presented at ECMOR I–1st European Conference on the Mathematics of Oil Recovery, Cambridge, England, 25–27 July. https://doi.org/10.3997/2214-4609.201411305.
Ren, G., Jiang, J., and Younis, R. M. 2016. A Fully Coupled XFEM-EDFM Model for Multiphase Flow and Geomechanics in Fractured Tight Gas Reservoirs. Procedia Computer Science 80 (June): 1404–1415. https://doi.org/10.1016/j.procs.2016.05.449.
Roussel, N. P. and Sharma, M. M. 2012. Role of Stress Reorientation in the Success of Refracture Treatments in Tight Gas Sands. SPE Prod & Oper 27 (4): 346–355. SPE-134491-PA. https://doi.org/10.2118/134491-PA.
Safari, R., Lewis, R., Ma, X. et al. 2016. Infill-Well Fracturing Optimization in Tightly Spaced Horizontal Wells. SPE J. 22 (2): 582–595. SPE-178513-PA. https://doi.org/10.2118/178513-PA.
Sardinha, C. M., Petr, C., Lehmann, J. et al. 2014. Determining Interwell Connectivity and Reservoir Complexity Through Frac Pressure Hits and Production Interference Analysis. Presented at the SPE/CSUR Unconventional Resources Conference–Canada, Calgary, 30 September–2 October. SPE-171628-MS. https://doi.org/10.2118/171628-MS.
Scott, K. D., Chu, W.-C., and Flumerfelt, R. W. 2015. Application of Real-Time Bottom-Hole Pressure to Improve Field Development Strategies in the Midland Basin Wolfcamp Shale. Presented at the Unconventional Resources Technology Conference, San Antonio, Texas, 20–22 July. URTEC-2154675-MS. https://doi.org/10.15530/URTEC-2015-2154675.
Settari, A. T., Bachman, R. C., and Walters, D. A. 2005. How to Approximate Effects of Geomechanics in Conventional Reservoir Simulation. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, 9–12 October. SPE-97155-MS. https://doi.org/10.2118/97155-MS.
Siebrits, E., Elbel, J. L., Hoover, R. S. et al. 2000. Refracture Reorientation Enhances Gas Production in Barnett Shale Tight Gas Wells. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, 1–4 October. SPE-63030-MS. https://doi.org/10.2118/63030-MS.
Simpson, M. D., Patterson, R., and Wu, K. 2016. Study of Stress Shadow Effects in Eagle Ford Shale: Insight From Field Data Analysis. Presented at the 50th US Rock Mechanics/Geomechanics Symposium, Houston, 26–29 June. ARMA-2016-190.
Terracina, J. M., Turner, J. M., Collins, D. H. et al. 2010. Proppant Selection and Its Effect on the Results of Fracturing Treatments Performed in Shale Formations. Presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19–22 September. SPE-135502-MS. https://doi.org/10.2118/135502-MS.
Tong, S. and Mohanty, K. K. 2016. Proppant Transport Study in Fractures With Intersections. Fuel 181 (1 October): 463–477. https://doi.org/10.1016/j.fuel.2016.04.144.
Vincent, M. 2011. Restimulation of Unconventional Reservoirs: When Are Refracs Beneficial? J Can Pet Technol 50 (5): 36–52. SPE-136757-PA. https://doi.org/10.2118/136757-PA.
Vincent, M. C. 2009. Examining Our Assumptions—Have Oversimplifications Jeopardized Our Ability to Design Optimal Fracture Treatments? Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 19–21 January. SPE-119143-MS. https://doi.org/10.2118/119143-MS.
Wolhart, S. L., McIntosh, G. E., Zoll, M. B. et al. 2007. Surface Tiltmeter Mapping Shows Hydraulic Fracture Reorientation in the Codell Formation, Wattenberg Field, Colorado. Presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, 11–14 November. SPE-110034-MS. https://doi.org/10.2118/110034-MS.
Wu,W., Kakkar, P., Zhou, J. et al. 2017. An Experimental Investigation of the Conductivity of Unpropped Fractures in Shales. Presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, The Woodlands, Texas, 24–26 January. SPE-184858-MS. https://doi.org/10.2118/184858-MS.
Xu, Y., Cavalcante Filho, J. S. A., Yu, W. et al. 2017. Discrete-Fracture Modeling of Complex Hydraulic-Fracture Geometries in Reservoir Simulators. SPE Res Eval & Eng 20 (2): 403–422. SPE-183647-PA. https://doi.org/10.2118/183647-PA.
Yeo, I. W., de Freitas, M. H., and Zimmerman, R. W. 1998. Effect of Shear Displacement on the Aperture and Permeability of a Rock Fracture. Int J Rock Mech Min Sci 35 (8): 1051–1070. https://doi.org/10.1016/S0148-9062(98)00165-X.
Yilmaz, O., Nur, A., and Nolen-Hoeksema, R. 1991. Pore Pressure Profiles in Fractured and Compliant Rooks. SPE-22232-MS.
Yu, W., Xu, Y., Weijermars, R. et al. 2017. Impact of Well Interference on Shale Oil Production Performance: A Numerical Model for Analyzing Pressure Response of Fracture Hits With Complex Geometries. Presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, The Woodlands, Texas, 24–26 January. SPE-184825-MS. https://doi.org/10.2118/184825-MS.
Zhang, J., Kamenov, A., Hill, A. D. et al. 2014. Laboratory Measurement of Hydraulic-Fracture Conductivities in the Barnett Shale. SPE Prod & Oper 29 (3): 216–227. SPE-163839-PA. https://doi.org/10.2118/163839-PA.
Zhang, X., Jeffrey, R. G., and Thiercelin, M. 2009. Mechanics of Fluid-Driven Fracture Growth in Naturally Fractured Reservoirs With Simple Network Geometries. J Geophys Res Solid Earth 114 (B12): B12406. https://doi.org/10.1029/2009JB006548.