Modeling of Fracture Width and Conductivity in Channel Fracturing With Nonlinear Proppant-Pillar Deformation
- Haiyan Zhu (Chengdu University of Technology; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation; Institute of Mechanics, Chinese Academy of Sciences) | Ya-Pu Zhao (Institute of Mechanics, Chinese Academy of Sciences; University of Chinese Academy of Sciences) | Yongcun Feng (University of Texas at Austin) | Haowei Wang (Southwest Petroleum University) | Liaoyuan Zhang (Sinopec Shengli Oilfield Company) | John D. McLennan (University of Utah)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- June 2019
- Document Type
- Journal Paper
- 1,288 - 1,308
- 2019.Society of Petroleum Engineers
- Channel fracturing, fracture conductivity, proppant pillar
- 19 in the last 30 days
- 201 since 2007
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Channel fracturing acknowledges that there will be local concentrations of proppant that generate high-conductivity channel networks within a hydraulic fracture. These concentrations of proppant form pillars that maintain aperture. The mechanical properties of these proppant pillars and the reservoir rock are important factors affecting conductivity. In this paper, the nonlinear stress/strain relationship of proppant pillars is first determined using experimental results. A predictive model for fracture width and conductivity is developed when unpropped, highly conductive channels are generated during the stimulation. This model considers the combined effects of pillar and fracture-surface deformation, as well as proppant embedment. The influence of the geomechanical parameters related to the formation and the operational parameters of the stimulation are analyzed using the proposed model. The results of this work indicate the following:
- Proppant pillars clearly exhibit compaction in response to applied closure stress, and the resulting axial and radial deformation should not be ignored in the prediction of fracture conductivity.
- There is an optimal ratio (approximately 0.6 to 0.7) of pillar diameter to pillar distance that results in a maximum hydraulic conductivity regardless of pillar diameter.
- The critical ratio of rock modulus to closure stress currently used in the industry to evaluate the applicability of a channel-fracturing technique is quite conservative.
- The operational parameters of fracturing jobs should also be considered in the evaluation.
|File Size||1 MB||Number of Pages||21|
API RP 61, Recommended Practices for Evaluating Short Term Proppant Pack Conductivity. 1989. Washington, DC: American Petroleum Institute.
Asgian, M. I., Cundall, P. A., and Brady, B. H. G. 1995. The Mechanical Stability of Propped Hydraulic Fractures: A Numerical Study. J Pet Technol 47 (3): 203–208. SPE-28510-PA. https://doi.org/10.2118/28510-PA.
Bear, J. 1972. Dynamics of Fluids in Porous Media. New York City: Elsevier.
Bolintineanu, D. S., Rao, R. R., Lechman, J. B. et al. 2017. Simulations of the Effects of Proppant Placement on the Conductivity and Mechanical Stability of Hydraulic Fractures. Int J Rock Mech Min Sci 100 (December): 188–198. https://doi.org/10.1016/j.ijrmms.2017.10.014.
Cleary, M. P. 1994. Critical Issues in Hydraulic Fracturing of High-Permeability Reservoirs. Presented at European Production Operations Conference and Exhibition, Aberdeen, 15–17 March. SPE-27618-MS. https://doi.org/10.2118/27618-MS.
Emam, M., Knight, R., Bezboruah, P. et al. 2014. Novel Hydraulic Fracturing Technique Application in Egypt. Presented at Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 10–13 November. SPE-172106-MS. https://doi.org/10.2118/172106-MS.
Gao, Y., Lv, Y., Wang, M. et al. 2013. New Mathematical Models for Calculating the Proppant Embedment and Conductivity. Presented at International Petroleum Technology Conference, Beijing, 26–28 March. IPTC-16410-MS. https://doi.org/10.2523/IPTC-16410-MS.
Gawad, A. A., Long, J., El-Khalek, T. et al. 2013. Novel Combination of Channel Fracturing With Rod-Shaped Proppant Increases Production in the Egyptian Western Desert. Presented at the SPE European Formation Damage Conference and Exhibition, Noordwijk, The Netherlands, 5–7 June. SPE-165179-MS. https://doi.org/10.2118/165179-MS.
Gillard, M. R., Medvedev, O. O., Hosein, P. R. et al. 2010. A New Approach to Generating Fracture Conductivity. Presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 20–22 September. SPE-135034-MS. https://doi.org/10.2118/135034-MS.
Guo, J. C., Wang, J. D., Liu, Y. X. et al. 2017. Analytical Analysis of Fracture Conductivity for Sparse Distribution of Proppant Packs. J Geophys Eng 14 (3): 599–610. https://doi.org/10.1088/1742-2140/aa6215.
Hou, B., Zheng, X., Chen, M. et al. 2016b. Parameter Simulation and Optimization in Channel Fracturing. J Nat Gas Sci Eng 35A (September): 122–130. https://doi.org/10.1016/j.jngse.2016.08.046.
Hou, T. F., Zhang, S. C., Yu, B. H. et al. 2016a. Theoretical Analysis and Experimental Research of Channel Fracturing in Unconventional Reservoir. Presented at SPE Europec featured at 78th EAGE Conference and Exhibition, Vienna, Austria, 30May–2 July. SPE-180105-MS. https://doi.org/10.2118/180105-MS.
Johnson, K. L. 1985. Contact Mechanics. Cambridge, UK: Cambridge University Press.
Kayumov, R., Klyubin, A., Konchenko, A. et al. 2014. Channel Fracturing Enhanced by Unconventional Proppant Increases Effectiveness of Hydraulic Fracturing in Devonian Formations of Russia’s Oilfields. Presented at the International Petroleum Technology Conference, Doha, 19–22 January. IPTC-17409-MS. https://doi.org/10.2523/IPTC-17409-MS.
Kayumov, R. E., Klyubin, A., Yudin, A. V. et al. 2012. First Channel Fracturing Applied in Mature Wells Increases Production From Talinskoe Oilfield in Western Siberia. Presented at the SPE Russian Oil & Gas Exploration & Production Technical Conference and Exhibition, Moscow, 16–18 October. SPE-159347-MS. https://doi.org/10.2118/159347-MS.
Li, A. Q., Mu, L. J., Li, X. W. et al. 2015a. The Channel Fracturing Technique Improves Tight Reservoir Potential in the Ordos Basin, China. Presented at the SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition, Bali, Indonesia, 20–22 October. https://doi.org/10.2118/176071-MS.
Li, K., Gao, Y., Lyu, Y. et al. 2015b. New Mathematical Models for Calculating Proppant Embedment and Fracture Conductivity. SPE J. 20 (3): 496–507. SPE-155954-PA. https://doi.org/10.2118/155954-PA.
Meyer, B., Bazan, L. W., Walls, D. et al. 2014. Theoretical Foundation and Design Formulae for Channel and Pillar Type Propped Fractures—A Method to Increase Fracture Conductivity. Presented at the SPE Annual Technical Conference and Exhibition, Amsterdam, 27–29 October. SPE-170781-MS. https://doi.org/10.2118/170781-MS.
Nguyen, P. D., Vo, L. K., Parton, C. et al. 2014. Evaluation of Low-Quality Sand for Proppant-Free Channel Fracturing Method. Presented at the International Petroleum Technology Conference, Kuala Lumpur, 10–12 December. IPTC-17937-MS. https://doi.org/10.2523/IPTC-17937-MS.
Rhein, T., Loayza, M. P., Kirkham, B. et al. 2011. Channel Fracturing in Horizontal Wellbores: The New Edge of Stimulation Techniques in the Eagle Ford Formation. Presented at the SPE Annual Technical Conference and Exhibition, Denver, 30 October–2 November. SPE-145403-MS. https://doi.org/10.2118/145403-MS.
Sadykov, A., Yudin, A. V., Oparin, M. et al. 2012. Channel Fracturing in the Remote Taylakovskoe Oil Field: Reliable Stimulation Treatments for Significant Production Increase. Presented at the SPE Russian Oil and Gas Exploration and Production Technical Conference and Exhibition, Moscow, 16–18 October. SPE-160767-MS. https://doi.org/10.2118/160767-MS.
Samuelson, M. L., Stefanski, J., Downie, R. et al. 2012. Field Development Study: Channel Hydraulic Fracturing Achieves Both Operational and Productivity Goals in the Barnett Shale. Presented at the SPE Americas Unconventional Resources Conference, Pittsburgh, Pennsylvania, 5–7 June. SPE-155684-MS. https://doi.org/10.2118/155684-MS.
Schlumberger. 2012. HiWAY: The Quest for Infinite Conductivity Innovation for a Step-Change in Hydraulic Fracturing. Presentation, Jornada De Maxi-Fracturas, May 2012. http://www.oilproduction.net/cms3/files/Villarreal.pdf.
Tang, Y., Ranjinth, P. G., Perera, M. S. A. et al. 2018. Influences of Proppant Concentration and Fracturing Fluids on Proppant-Embedment Behavior for Inhomogeneous Rock Medium: An Experimental and Numerical Study. SPE Prod & Oper 33 (4): 666–678. SPE-189984-PA. https://doi.org/10.2118/189984-PA.
Turner, M. G, Weinstock, C. T., Laggan, M. J. et al. 2011. Raising the Bar in Completion Practices in Jonah Field: Channel Fracturing Increases Gas Production and Improves Operational Efficiency. Presented at the Canadian Unconventional Resources Conference, Calgary, 15–17 November. SPE-147587-MS. https://doi.org/10.2118/147587-MS.
Valenzuela, A., Guzma´n, J., Cha´vez, S. et al. 2012. Field Development Study: Channel Fracturing Increases Gas Production and Improves Polymer Recovery in Burgos Basin, Mexico North. Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 6–8 February. SPE-152112-MS. https://doi.org/10.2118/152112-MS.
Valiullin, A., Vladimir, M., Yudin, A. et al. 2015. Channel Fracturing Technique Helps to Revitalize Brown Fields in Langepas Area. Presented at the SPE Oil and Gas India Conference and Exhibition, Mumbai, 24–26 November. SPE-178131-MS. https://doi.org/10.2118/178131-MS.
Wang, J. and Elsworth, D. 2018. Role of Proppant Distribution on the Evolution of Hydraulic Fracture Conductivity. J Pet Sci Eng 166 (July): 249–262. https://doi.org/10.1016/j.petrol.2018.03.040.
Yan, X., Huang, Z., Yao, J. et al. 2016. Theoretical Analysis of Fracture Conductivity Created by the Channel-Fracturing Technique. J Nat Gas Sci Eng 31 (April): 320–330. https://doi.org/10.1016/j.jngse.2016.03.038.
Zhang, F., Zhu, H., Zhou, H. et al. 2017. Discrete-Element-Method/ Computational-Fluid-Dynamics Coupling Simulation of Proppant Embedment and Fracture Conductivity After Hydraulic Fracturing. SPE J. 22 (2): 632–644. SPE-185172-PA. https://doi.org/10.2118/185172-PA.
Zhang, J. 2014. Theoretical Conductivity Analysis of Surface Modification Agent Treated Proppant. Fuel 134 (15 October): 166–170. https://doi.org/10.1016/j.fuel.2014.05.031.
Zhang, J. and Hou, J. 2016. Theoretical Conductivity Analysis of Surface Modification Agent Treated Proppant II—Channel Fracturing Application. Fuel 165 (1 February): 28–32. https://doi.org/10.1016/j.fuel.2015.10.026.
Zheng, X., Chen, M., Hou, B. et al. 2017. Effect of Proppant Distribution Pattern on Fracture Conductivity and Permeability in Channel Fracturing. J Pet Sci Eng 149 (20 January): 98–106. https://doi.org/10.1016/j.petrol.2016.10.023.
Zhu, H., Shen, J., Zhang, F. et al. 2018. DEM-CFD Modeling of Proppant Pillar Deformation and Stability During the Fracturing Fluid Flowback. Geofluids 2018: 3535817. https://doi.org/10.1155/2018/3535817.
Zhu, H., Zhang, X., Guo, J. C. et al. 2015. Stress Field Interference of Hydraulic Fractures in Layered Formation. Geomech Eng 9 (5): 645–667. https://doi.org/10.12989/gae.2015.9.5.645.
Zhu, H.-Y., Jin, X.-C., Guo, J.-C. et al. 2016. Coupled Flow, Stress and Damage Modelling of Interactions Between Hydraulic Fractures and Natural Fractures in Shale Gas Reservoirs. Int J Oil Gas Coal Tech 13 (4): 359–390. https://doi.org/10.1504/IJOGCT.2016.080095.