Influence of Finite Hydraulic-Fracture Conductivity on Unconventional Hydrocarbon Recovery With Horizontal Wells
- Deming Mao (Shell International Exploration and Production Company) | David S. Miller (Shell Exploration and Production Company) | John M. Karanikas (Shell International Exploration and Production Company) | Ed A. Lake (Shell International Exploration and Production Company) | Phillip S. Fair (Shell International Exploration and Production Company) | Xin Liu (Shell International Exploration and Production Company)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- December 2017
- Document Type
- Journal Paper
- 1,790 - 1,807
- 2017.Society of Petroleum Engineers
- unconventional hydrocarbon recovery, horizontal well, fracture flow efficiency, finite fracture conductivity, fold-of-increase
- 3 in the last 30 days
- 455 since 2007
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The classic plots of dimensionless fracture conductivity (CfD) vs. equivalent wellbore radius or equivalent negative skin are useful for evaluating the performance of hydraulic fractures (HFs) in vertical wells targeting conventional reservoirs (Prats 1961; Cinco-Ley and Samaniego-V. 1981). The increase in well productivity after hydraulic stimulation can be estimated from the “after fracturing” effective wellbore radius or from the “after fracturing” equivalent negative skin. However, this earlier work does not apply to the case of horizontal wells with multiple fractures. A revision of the diagnostic plots is needed to account for the combination of the resulting radial-flow regime and the transient effect in unconventional reservoirs with ultralow permeability. This paper reviews and extends this earlier work with the objective of making it applicable in the case of horizontal wells with multiple fractures. It also demonstrates practical application of this new technique for fracture-design optimization for horizontal wells.
The influence of finite fracture conductivity (FC) on the HF flow efficiency is evaluated through analytical models, and it is confirmed by a 3D transient numerical-reservoir simulation. This work demonstrates that a redefined dimensionless fracture conductivity for horizontal wells CfD,h = 4 is found to be optimal by use of the maximum of log-normal derivative (subject to economics) for HFs in horizontal wells, and this value of CfD,h can provide 50% of the fracture-flow efficiency and 90% of the estimated ultimate recovery (EUR) that would have been obtained from an infinitely conductive fracture for the same production period. This new master plot can provide guidance for hydraulic-fracturing design and its optimization for hydrocarbon recovery in unconventional reservoirs through hydraulic fracturing in horizontal wells.
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Aggour, T. M. and Economides, M. J. 1999. Impact of Fluid Selection on High-Permeability Fracturing. SPE Prod & Fac 14 (1): 72–76. SPE-54536-PA. https://doi.org/10.2118/54536-PA.
Barree, R. D. and Conway, M. W. 2009. Multiphase Non-Darcy Flow in Proppant Packs. SPE Prod & Oper 24 (2): 257–268. SPE-109561-PA. https://doi.org/10.2118/109561-PA.
Bellarby, J. 2009. Well Completion Design, Vol. 56, first edition. Amsterdam: Elsevier Science.
Brown, M., Ozkan, E., Raghavan, R. et al. 2011. Practical Solutions for Pressure-Transient Responses of Fractured Horizontal Wells in Unconventional Shale Reservoirs. SPE Res Eval & Eng 14 (6): 663–676. SPE-125043-PA. https://doi.org/10.2118/125043-PA.
Chen, C.-C. and Raghavan, R. 1997. A Multiply-Fractured Horizontal Well in a Rectangular Drainage Region. SPE J. 2 (4): 455–465. SPE-37072-PA. https://doi.org/10.2118/37072-PA.
Chen, C.-C., Serra, K., Reynolds, A. C. et al. 1985. Pressure Transient Analysis Methods for Bounded Naturally Fractured Reservoirs. SPE J. 25 (3): 451–464. SPE-11243-PA. https://doi.org/10.2118/11243-PA.
Cinco-Ley, H. and Samaniego-V., F. 1981. Transient Pressure Analysis for Fractured Wells. J Pet Technol 33 (9): 1749–1766. SPE-7490-PA. https://doi.org/10.2118/7490-PA.
Computer Modelling Group (CMG). 2015. IMEX. Calgary: CMG.
Cooke, C. E. Jr. 1973. Conductivity of Fracture Proppants in Multiple Layers. J Pet Technol 25 (9): 1101–1107. SPE-4117-PA. https://doi.org/10.2118/4117-PA.
Cossio, M., Moridis, G. J., and Blasingame, T. A. 2013. A Semianalytic Solution for Flow in Finite-Conductivity Vertical Fractures by Use of Fractal Theory. SPE J. 18 (1): 83–96. SPE-153715-PA. https://doi.org/10.2118/153715-PA.
Dake, L. P. 2007. Fundamentals of Reservoir Engineering, Vol. 8. Amsterdam: Elsevier.
Dyes, A. B., Kemp, C. E., and Caudle, B. H. 1958. Effect of Fractures on Sweep-out Pattern. SPE-1071-G.
Economides, M. J., Hill, A. D., and Ehlig-Economides, C. 2012. Petroleum Production Systems, second edition. Upper Saddle River, New Jersey: Prentice Hall.
Economides, M. J., Oligney, R. E., and Valko, P. 2002. Unified Fracture Design: Bridging the Gap Between Theory and Practice. Alvin, Texas: Orsa Press.
Guk, V., Tuzovskiy, M., Wolcott, D. et al. 2015. Optimizing Number of Fractures in Horizontal Well. Presented at the SPE Annual Technical Conference and Exhibition, Houston, 28–30 September. SPE-174772-MS.
Hagoort, J. 2009. The Productivity of a Well with a Vertical Infinite-Conductivity Fracture in a Rectangular Closed Reservoir. SPE J. 14 (4): 715–720. SPE-112975-PA. https://doi.org/10.2118/112975-PA.
Hagoort, J. 2011. The Productivity of a Well Completed With a Vertical Penny-Shaped Fracture. SPE J. 16 (2): 401–410. SPE-104385-PA. https://doi.org/10.2118/104385-PA.
Hanna, B., Ayoub, J., and Cooper, B. 1992. Rewriting the Rules for High-Permeability Stimulation. Oilfield Rev. 4 (4): 18–23.
Hegre, T. M. and Larsen, L. 1994. Productivity of Multifractured Horizontal Wells. Presented at the European Petroleum Conference, London, 25–27 October. SPE-28845-MS. https://doi.org/10.2118/28845-MS.
Howard, G. C and Fast, C. R. 1970. Hydraulic Fracturing. Richardson, Texas: Monograph Series, Society of Petroleum Engineers.
Jones, J. R. and Britt, L. K. 2009. Design and Appraisal of Hydraulic Fractures. Richardson, Texas: Society of Petroleum Engineers.
Kazemi, H. 1969. Pressure Transient Analysis of Naturally Fractured Reservoirs with Uniform Fracture Distribution. SPE J. 9 (4): 451–462. SPE-2156-A. https://doi.org/10.2118/2156-A.
Larsen, L. 1998. Productivities of Fractured and Nonfractured Deviated Wells in Commingled Layered Reservoirs. SPE J. 3 (2): 191–199. SPE-38912-PA. https://doi.org/10.2118/38912-PA.
Larsen, L. 2011. Horizontal Fractures in Single and Multilayer Reservoirs. Presented at the Canada Unconventional Resources Conference, Calgary, 15–17 November. SPE-147004-MS. https://doi.org/10.2118/147004-MS.
Larsen, L. and Hegre, T. M. 1991. Pressure-Transient Behavior of Horizontal Wells With Finite-Conductivity Vertical Fractures. Presented at the International Arctic Technology Conference, Anchorage, 29–31 May. SPE-22076-MS. https://doi.org/10.2118/22076-MS.
Larsen, L. and Hegre, T. M. 1994. Pressure Transient Analysis of Multifractured Horizontal Wells. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 25–28 September. SPE-28389-MS. https://doi.org/10.2118/28389-MS.
Lu, Y. and Chen, K. P. 2016. Productivity-Index Optimization for Hydraulically Fractured Vertical Wells in a Circular Reservoir: A Comparative Study With Analytical Solutions. SPE J. 21 (6): 2208–2219. SPE-180929-PA. https://doi.org/10.2118/180929-PA.
Mao, D., Karanikas, J. M., Fair, P. S. et al. 2016. A Different Perspective on the Forchheimer and Ergun Equations. SPE J. 21 (5): 1501–1507. SPE-180920-PA. https://doi.org/10.2118/180920-PA.
Martins, J. P., Leung, K. H., Jackson, M. R. et al. 1992. Tip Screenout Fracturing Applied to the Ravenspurn South Gas Field Development. SPE Prod Eng 7 (3): 252–258. SPE-19766-PA. https://doi.org/10.2118/19766-PA.
McGuire, W. J. and Sikora, V. J. 1960. The Effect of Vertical Fractures on Well Productivity. J Pet Technol 12 (10): 72–74. SPE-1618-G. https://doi.org/10.2118/1618-G.
NSI Technologies, Inc. 2001. Frac Tips. 3 (1): 1–2.
Odunowo, T. O., Moridis, G. J., Blasingame, T. A. et al. 2014. Evaluation of Well Performance for the Slot-Drill Completion in Low- and Ultralow-Permeability Oil and Gas Reservoirs. SPE J. 19 (5): 748–760. SPE-164547-PA. https://doi.org/10.2118/164547-PA.
Peaceman, D. W. 1983. Interpretation of Well-Block Pressures in Numerical Reservoir Simulation With Nonsquare Grid Blocks and Anisotropic Permeability. SPE J. 23 (3): 531–543. SPE-10528-PA. https://doi.org/10.2118/10528-PA.
Prats, M. 1961. Effect of Vertical Fracture on Reservoir Behavior – Incompressible Fluid Case. SPE J. 1 (2): 105–117. SPE-1575-G. https://doi.org/10.2118/1575-G.
Prats, M. and Raghavan, R., 2012. Finite Horizontal Well Crossing a Natural Fracture Normally. SPE J. 17 (2): 555–567. SPE-153382-PA. https://doi.org/10.2118/153382-PA.
Prats, M. and Raghavan, R. 2013. Finite Horizontal Well in a Uniform-Thickness Reservoir Crossing a Natural Fracture Normally. SPE J. 18 (5): 982–992. SPE-163098-PA. https://doi.org/10.2118/163098-PA.
Raghavan, R., Chen, C.-C., and Agarwal, B. 1997. An Analysis of Horizontal Wells Intercepted by Multiple Fractures. SPE J. 2 (3): 235–246. SPE-27652-PA. https://doi.org/10.2118/27652-PA.
Rassenfoss, S. 2014. BHP Billiton Testing New Methods to Maximize Returns on Completions, E&P Notes (August 2014). J Pet Technol 66 (8): 40–42. SPE-0814-0036-JPT. https://doi.org/10.2118/0814-0036-JPT.
Roberts, B. E., van Engen, H., and van Kruysdijk, C. P. J. W. 1991. Productivity of Multiply Fractured Horizontal Wells in Tight Gas Reservoirs. Presented at Offshore Europe, Aberdeen, 3–6 September. SPE-23113-MS. https://doi.org/10.2118/23113-MS.
Tuma, J. J. and Walsh, R. A. 1998. Engineering Mathematics Handbook. New York City: McGraw-Hill.
Upchurch, E. R. 2003. Determining Fracture Closure Pressure in Soft Formations Using Post-Closure Pulse Testing. SPE Prod & Fac 18 (4): 230–235. SPE-87087-PA. https://doi.org/10.2118/87087-PA.
Valkó, P. and Economides, M. J. 1995. Hydraulic Fracture Mechanics. Hoboken, New Jersey: John Wiley & Sons.
van Kruysdijk, C. P. J. W. and Dullaert, G. M. 1989. A Boundary Element Solution to the Transient Pressure Response of Multiply Fractured Horizontal Wells. Oral presentation given at ECMOR I – 1st European Conference on the Mathematics of Oil Recovery, Cambridge, UK, 1 July.
Wan, J. and Aziz, K. 2002. Semi-Analytical Well Model of Horizontal Wells With Multiple Hydraulic Fractures. SPE J. 7 (4): 437–445. SPE-81190-PA. https://doi.org/10.2118/81190-PA.
Wen, Q., Zhang, S., Wang, L. et al. 2007. The Effect of Proppant Embedment Upon the Long-Term Conductivity of Fractures. Journal of Petroleum Science and Engineering 55 (3–4): 221–227. https://doi.org/10.1016/j.petrol.2006.08.010.
Zuckerman, G. 2014. The Frackers: The Outrageous Inside Story of the New Billionaire Wildcatters. New York City: Penguin Group.