Numerical Investigation of Coupling Multiphase Flow and Geomechanical Effects on Water Loss During Hydraulic-Fracturing Flowback Operation
- Mingyuan Wang (University of Alberta) | Juliana Y. Leung (University of Alberta)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- July 2016
- Document Type
- Journal Paper
- 520 - 537
- 2016.Society of Petroleum Engineers
- Flow-back, Mechanistic models, Tight reservoirs, Hydraulic fracturing, Secondary fractures
- 3 in the last 30 days
- 440 since 2007
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Less than half the fracturing fluid is typically recovered during the flowback operation. This study models the effects of capillarity and geomechanics on water loss in the fracture/matrix system, and investigates the circumstances under which this phenomenon might be beneficial or detrimental to subsequent tight-oil production. During the shut-in (soaking) and flowback periods, the fracture conductivity decreases as effective stress increases because of imbibition. Previous works have addressed fracture closure during the production phase; however, the coupling of imbibition caused by multiphase flow and stress-dependent fracture properties during shut-in is less understood. A series of mechanistic simulation models is constructed to simulate multiphase flow and fluid distribution during shut-in and flowback. Three systems—matrix, hydraulic fracture, and microfractures—are explicitly represented in the computational domain. Sensitivities to wettability and multiphase-flow functions (relative permeability and capillary pressure relationships) are investigated. As wettability to water increases, matrix imbibition increases. Imbibition helps to displace the hydrocarbons into nearby microfractures and hydraulic fractures, enhancing initial oil rate, but it also hinders water recovery. The results indicate that fracture closure may enhance imbibition and water loss, which, in turn, leads to further reduction in fracture pressure and conductivity. Results also suggest that more-aggressive flowback is beneficial to water cleanup and long-term oil production in stiff rocks, whereas this benefit is less prominent in medium-to-soft formations because of excessive fracture closure. Because no direct correlation between high initial oil-flow rate and improved cumulative oil production is observed, measures for increasing oil relative permeability are recommended for improving long-term oil production. This work presents a quantitative study of the controlling factors of water loss caused by fluid/rock properties and geomechanics. The results highlight the crucial interplay between imbibition and geomechanics in short- and long-term production performances. The results in this study would have considerable impact on understanding and improving current industry practice in fracturing design and assessment of stimulated reservoir volume.
|File Size||1 MB||Number of Pages||18|
Abbasi, M. A., Ezulike, D. O., Dehghanpour, H. et al. 2014. A Comparative Study of Flowback Rate and Pressure Transient Behavior in Multifractured Horizontal Wells Completed in Tight Gas and Oil Reservoirs. Journal of Natural Gas Science and Engineering 17: 82–93. http://dx.doi.org/10.1016/j.jngse.2013.12.007.
Aguilera, R. 1980. Naturally Fractured Reservoirs. Petroleum Publishing Company.
Alkouh, A., McKetta, S., and Wattenbarger, R. A. 2014. Estimation of Effective-Fracture Volume Using Water-Flowback and Production Data for Shale-Gas Wells. J Can Pet Technol 53 (5): 290–303. SPE- 166279-PA. http://dx.doi.org/10.2118/166279-PA.
Almulhim, A., Alharthy, N., Tutuncu, A. N. et al. 2014. Impact of Imbibition Mechanism on Flowback Behavior: A Numerical Study. Presented at the Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 10–13 November. SPE-171799-MS. http://dx.doi.org/10.2118/171799-MS.
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, USA, 24–27 June. ARMA 12-291.
Anderson, W. G. 1987a. Wettability Literature Survey—Part 4: Effects of Wettability on Capillary Pressure. J Pet Technol 39 (10): 1283–1300. SPE-15271-PA. http://dx.doi.org/10.2118/15271-PA.
Anderson, W. G. 1987b. Wettability Literature Survey—Part 5: The Effects of Wettability on Relative Permeability. J Pet Technol 39 (11): 1453–1468. SPE-16323-PA. http://dx.doi.org/10.2118/16323-PA.
Baecher, G. B., Lanney, N. A., and Einstein, H. H. 1977. Statistical Description of Rock Properties and Sampling. Presented at The 18th US Symposium on Rock Mechanics (USRMS), Golden, Colorado, USA, 22–24 June. ARMA 77-0400.
Bennion, D. B., Thomas, F. B., Schulmeister, B. E. et al. 2002. A Correlation of Water and Gas-Oil Relative Permeability Properties for Various Western Canadian Sandstone and Carbonate Oil Producing Formations. Presented at the Canadian International Petroleum Conference, Calgary, 11–13 June. PETSOC-2002-066.
Blair, P. M. 1964. Calculation of Oil Displacement by Countercurrent Water Imbibition. SPE J. 4 (3). Also, Presented at the Secondary Recovery Conference, Wichita Falls, Texas, USA, 2–3 May 1960. SPE-873-PA. http://dx.doi.org/10.2118/873-PA.
Bradley, H. B. ed. 1992. Petroleum Engineering Handbook, third edition, Chap. 26. Richardson, Texas: SPE.
Brownscombe, E. R. and Dyes, A. B. 1952. Water-imbibition Displacement—A Possibility for the Spraberry. Presented at the Drilling and Production Practice, New York, USA, 1 January. API 52-383.
Cacas, M. C., Ledoux, E., Marsily, G. D. et al. 1990. Modeling Fracture Flow With a Stochastic Discrete Fracture Network: Calibration and Validation: 1. The Flow Model. Water Resources Research 26 (3): 479–489. http://dx.doi.org/10.1029/WR026i003p00479.
Cheng, Y. 2012. Impact of Water Dynamics in Fractures on the Performance of Hydraulically Fractured Wells in Gas-Shale Reservoirs. J Can Pet Technol 51 (2): 143–151. SPE-127863-PA. http://dx.doi.org/10.2118/127863-PA.
Chilès, J. P. 2005. Stochastic Modeling of Natural Fractured Media: A Review, 284–294.
In Geostatistics Banff 2004. Springer Netherlands.
Cho, Y., Apaydin, O. G., and Ozkan, E. 2013. Pressure-Dependent Natural-Fracture Permeability in Shale and Its Effect on Shale-Gas Well Production. SPE Res Eval & Eng 16 (2): 216–228. SPE-159801-PA. http://dx.doi.org/10.2118/159801-PA.
Chu, L., Ye, P., Harmawan, I. et al. 2015. Characterizing and Simulating the Non-Stationarity and Non-Linearity in Unconventional Oil Reservoirs: Bakken Application. Journal of Unconventional Oil and Gas Resources 9: 40–53. http://dx.doi.org/10.1016/j.juogr.2014.10.002.
Cil, M., Reis, J. C., Miller, M. A. et al. 1998. An Examination of Countercurrent Capillary Imbibition Recovery From Single Matrix Blocks and Recovery Predictions by Analytical Matrix/Fracture Transfer Functions. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, USA, 27–30 September. SPE-49005-MS. http://dx.doi.org/10.2118/49005-MS.
Clemo, T. M. 1994. Dual Permeability Modeling of Fractured Media. University of British Columbia.
Computer Modelling Group. 2013. IMEX: Three-phase, Black-oil Reservoir Simulator User’s Guide (Version 2013). Computer Modelling Group Limited, Calgary.
Dandekar, Abhijit Y. 2013. Petroleum Reservoir Rock and Fluid Properties, second edition. CRC Press.
Duong, A. N. 2011. Rate-Decline Analysis for Fracture-Dominated Shale Reservoirs. SPE Res Eval & Eng 14 (3): 377–387. SPE-137748-PA. http://dx.doi.org/10.2118/137748-PA.
Economides, M. J. and Nolte, K. G. 2000. Reservoir Stimulation. Wiley.
Ehlig-Economides, C. A., Ahmed, I. A., Apiwathanasorn, S. et al. 2012. Stimulated Shale Volume Characterization: Multiwell Case Study From the Horn River Shale: II. Flow Perspective. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 8–10 October. SPE-159546-MS. http://dx.doi.org/10.2118/159546-MS.
Ertekin, T, Abou-Kassem, J. H., and King, G. R. 2001. Basic Applied Reservoir Simulation, SPE Textbook Series, Vol. 7. Richardson, Texas: Society of Petroleum Engineers.
Fakcharoenphol, P., Torcuk, M. A., Wallace, J. et al 2013. Managing Shut-in Time to Enhance Gas Flow Rate in Hydraulic Fractured Shale Reservoirs: A Simulation Study. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, USA, 30 September.
Fan, L., Thompson, J. W., and Robinson, J. R. 2010. Understanding Gas Production Mechanism and Effectiveness of Well Stimulation in the Haynesville Shale Through Reservoir Simulation. Presented at the Canadian Unconventional Resources & International Petroleum Conference, Calgary, 19–21 October. SPE-136696-MS. http://dx.doi.org/10.2118/136696-MS.
Gale, J. E., Schaefer, R. A., Carpenter, A. B. et al. 1991. Collection Analysis and Integration of Discrete Fracture Data From the Monterey Formation for Fractured Reservoir Simulations. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, 6–9 October. SPE-22741-MS. http://dx.doi.org/10.2118/22741-MS.
Gdanski, R. D., Fulton, D. D., and Shen, C. 2009. Fracture-Face Skin Evolution During Cleanup. SPE Prod & Oper 24 (1): 22–34. SPE-101083-PA. http://dx.doi.org/10.2118/101083-PA.
Gdanski, R. D. and Walters, H. G. 2010. Impact of Fracture Conductivity and Matrix Relative Permeability on Load Recovery. Presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19–22 September. SPE-133057-MS. http://dx.doi.org/10.2118/133057-MS.
Ghanbari, E. and Dehghanpour, H. 2016. The Fate of Fracturing Water: A Field and Simulation Study. Fuel 163: 282–294. http://dx.doi.org/10.1016/j.fuel.2015.09.040.
Holditch, S. A. 1979. Factors Affecting Water Blocking and Gas Flow From Hydraulically Fractured Gas Wells. J Pet Technol 31 (12): 1515–1524. SPE-7561-PA. http://dx.doi.org/10.2118/7561-PA.
Huo, D., Li, B., and Benson, S. M. 2014. Investigating Aperture-Based Stress-Dependent Permeability and Capillary Pressure in Rock Fractures. Presented at the SPE Annual Technical Conference and Exhibition, Amsterdam, 27–29 October. SPE-170819-MS. http://dx.doi.org/10.2118/170819-MS.
Jadhunandan, P. P. and Morrow, N. R. 1995. Effect of Wettability on Waterflood Recovery for Crude-Oil/Brine/Rock Systems. SPE Res Eng 10 (1): 40–46. SPE-22597-PA. http://dx.doi.org/10.2118/22597-PA.
Jerauld, G. R. and Rathmell, J. J. 1997. Wettability and Relative Permeability of Prudhoe Bay: A Case Study in Mixed-Wet Reservoirs. SPE Res Eng 12 (1): 58–65. SPE-28576-PA. http://dx.doi.org/10.2118/28576-PA.
Karimaie, H. and Torsaeter, O. 2007. Effect of Injection Rate, Initial Water Saturation and Gravity on Water Injection in Slightly Water-Wet Fractured Porous Media. Journal of Petroleum Science and Engineering 58: 293–308. http://dx.doi.org/10.1016/j.petrol.2007.02.002.
Karimi-Fard, M., Durlofsky, L. J., and Aziz, K. 2004. An Efficient Discrete-fracture Model Applicable for General-purpose Reservoir Simulation. SPE J. 9 (2): 227–236. SPE-88812-PA. http://dx.doi.org/10.2118/88812-PA.
Kazemi, H., Merrill Jr., L. S., Porterfield, K. L. et al. 1976. Numerical Simulation of Water-Oil Flow in Naturally Fractured Reservoirs. SPE J. 16 (6): 317–326.
Leverett, M. C. 1941. Capillary Behavior in Porous Solids. Trans. of the AIME 142 (1): 152–169. SPE-941152-G. http://dx.doi.org/10.2118/941152-G.
Li, K., Chow, K., and Horne, R. N. 2006. Influence of Initial Water Saturation on Recovery by Spontaneous Imbibition in Gas/Water/Rock Systems and the Calculation of Relative Permeability. SPE Res Eval & Eng 9 (4): 295–301. SPE-99329-PA. http://dx.doi.org/10.2118/99329-PA.
Li, K. and Li, Y. 2014. Effect of Initial Water Saturation on Crude Oil Recovery and Water Cut in Water-Wet Reservoirs. International Journal of Energy Research 38: 1599–1607. http://dx.doi.org/10.1002/er.3182.
Liang, T., Longoria, R. A., Lu, J. et al. 2015. The Applicability of Surfactants on Enhancing the Productivity in Tight Formations. Presented at the Unconventional Resources Technology Conference, San Antonio, Texas, USA, 20–22 July. SPE-178584-MS. http://dx.doi.org/10.2118/178584-MS.
Long, J., Gilmour, P., and Witherspoon, P. A. 1985. A Model for Steady Fluid Flow in Random Three-dimensional Networks of Disc-shaped Fractures. Water Resources Research 21 (8): 1105–1115. http://dx.doi.org/10.1029/WR021i008p01105.
Makhanov, K., Habibi, A., Dehghanpour, H. et al. 2014. Liquid Uptake of Gas Shales: A Workflow to Estimate Water Loss During Shut-in Periods After Fracturing Operations. Journal of Unconventional Oil and Gas Resources 7: 22–32. http://dx.doi.org/10.1016/j.juogr.2014.04.001.
Mayerhofer, M. J. and Meehan, D. N. 1998. Waterfracs: Results From 50 Cotton Valley Wells. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, USA, 27–30 September. SPE-49104-MS. http://dx.doi.org/10.2118/49104-MS.
McClure, M. and Zoback, M. D. 2013. Computational Investigation of Trends in Initial Shut-in Pressure During Multi-stage Hydraulic Stimulation in the Barnett Shale. Presented at the 47th US Rock Mechanics/Geomechanics Symposium, San Francisco, USA, 23–26 June. ARMA 2013-368.
McClure, M. 2014. The Potential Effect of Network Complexity on Recovery of Injected Fluid Following Hydraulic Fracturing. Presented at the SPE Unconventional Resources Conference, The Woodlands, Texas, USA, 1–3 April. SPE-168991-MS. http://dx.doi.org/10.2118/168991-MS.
Morrow, N. R. and McCaffery, F. G. 1978. Displacement Studies in Uniformly Wetted Porous Media. Wetting, Spreading, and Adhesion, 289–319. Academic Press.
Nojabaei, B., Johns, R. T., and Chu, L. 2013. Effect of Capillary Pressure on Fluid Density and Phase Behavior in Tight Rocks and Shales. SPE Res Eval & Eng 16 (3): 281–289. SPE-159258-PA. http://dx.doi.org/10.2118/159258-PA.
Osholake, T., Wang, J. Y., and Ertekin, T. 2012. Factors Affecting Hydraulically Fractured Well Performance in the Marcellus Shale Gas Reservoirs. Journal of Energy Resources Technology 135.1: 013402. http://dx.doi.org/10.1115/1.4007766.
Pagels, M., Hinkel, J. J., and Willberg, D. M. 2012. Measuring Capillary Pressure Tells More Than Pretty Pictures. Presented at the SPE International Symposium and Exhibition on Formation Damage Control, Lafayette, Louisiana, USA, 15–17 February. SPE-151729-MS. http://dx.doi.org/10.2118/151729-MS.
Parmar, J., Dehghanpour, H., and Kuru, E. 2012. Unstable Displacement: A Missing Factor in Fracturing Fluid Recovery. Presented at the SPE Canadian Unconventional Resources Conference, Calgary, 30 October–1 November. SPE-162649-MS. http://dx.doi.org/10.2118/162649-MS.
Parmar, J., Kuru, E., and Dehghanpour, H. 2013. Drainage Against Gravity: Factors Impacting the Load Recovery in Fractures. Presented at the SPE Unconventional Resources Conference, The Woodlands, Texas, USA, 10–12 April. SPE-164530-MS. http://dx.doi.org/10.2118/164530-MS.
Peters, Ekwere J. 2012. Advanced Petrophysics. Live Oak Book Company.
Pitman, J. K., Price, L. C., and LeFever, J. A. 2001. Diagenesis and Fracture Development in the Bakken Formation, Williston Basin: Implications for Reservoir Quality in the Middle Member. US Department of the Interior, US Geological Survey.
Pope, C., Benton, T., and Palisch, T. 2009. Haynesville Shale-One Operator’s Approach to Well Completions in This Evolving Play. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, USA, 4–7 October. SPE-125079-MS. http://dx.doi.org/10.2118/125079-MS.
Qasem, F. H., Nashawi, I. S., Gharbi, R. et al. 2008. Recovery Performance of Partially Fractured Reservoirs by Capillary Imbibition. Journal of Petroleum Science and Engineering 60 (1): 39–50. http://dx.doi.org/10.1016/j.petrol.2007.05.008.
Raghavan, R. and Chin, L. Y. 2002. Productivity Changes in Reservoirs With Stress-Dependent Permeability. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 29 September–2 October. SPE-77535-MS. http://dx.doi.org/10.2118/77535-MS.
Reinicke, A., Rybacki, E., Stanchits, S. et al. 2010. Hydraulic Fracturing Stimulation Techniques and Formation Damage Mechanisms—Implications From Laboratory Testing of Tight Sandstone–Proppant Systems. Chemie Der Erde—Geochemistry 70: 107–117. http://dx.doi.org/10.1016/j.chemer.2010.05.016.
Rouleau, A. and Gale, J. E. 1985. Statistical Characterization of the Fracture System in the Stripa Granite, Sweden. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 22 (6): 353–367. http://dx.doi.org/10.1016/0148-9062(85)90001-4.
Rubin, B. 2010. Accurate Simulation of Non-Darcy Flow in Stimulated Fractured Shale Reservoirs. Presented at the SPE Western Regional Meeting, Anaheim, California, USA, 27–29 May. SPE-132093-MS. http://dx.doi.org/10.2118/132093-MS.
Sherman, J. B. and Holditch, S. A. 1991. Effect of Injected Fracture Fluids and Operating Procedures in Ultimate Gas Recovery. Presented at the SPE Gas Technology Symposium, Houston, USA, 22–24 January. SPE-21496-MS. http://dx.doi.org/10.2118/21496-MS.
Sil, S. and Srinivasan, S. 2009. Stochastic Simulation of Fracture Strikes Using Seismic Anisotropy Induced Velocity Anomalies. Exploration Geophysics 40 (3). http://dx.doi.org/10.1071/EG08129.
Stone, H. L. 1973. Estimation of Three-Phase Relative Permeability and Residual Oil Data. J Can Pet Technol 12 (4). SPE-73-04-06-PA. http://dx.doi.org/10.2118/73-04-06-PA.
Stoyan, D. and Stoyan, H. 1994. Fractals, Random Shapes, and Point Fields: Methods of Geometrical Statistics. Chichester: Wiley.
Takahashi, S. and Kovscek, R. 2009. Spontaneous Countercurrent Imbibition and Forced Displacement Characteristics of Low-Permeability, Siliceous Shale Rocks. Presented at the SPE Western Regional Meeting, San Jose, California, 24–26 March. SPE-121354-MS. http://dx.doi.org/10.2118/121354-MS.
Tang, G. and Firoozabadi, A. 2001. Effect of Pressure Gradient and Initial Water Saturation on Water Injection in Water-Wet and Mixed-Wet Fractured Porous Media. SPE Res Eval & Eng 4 (6): 516–524. SPE-74711-PA. http://dx.doi.org/10.2118/74711-PA.
Tong, Z., Xie, X., and Morrow, N. R. 2002. Scaling of Viscosity Ratio for Oil Recovery by Imbibition From Mixed-Wet Rocks. Petrophysics 43 (4). SPWLA-2002-v43n4a1.
Wang, M. and Leung, J. 2014. Investigating the Mechanisms and Time-Scale of Imbibition During Hydraulic Fracturing Flow-Back Operation in Tight Reservoirs. Presented at the International Discrete Fracture Network Engineering Conference, Vancouver, Canada, 19–22 October.
Wang, M. and Leung, J. 2015. Numerical Investigation of Fluid-Loss Mechanisms During Hydraulic Fracturing Flow-Back Operations in Tight Reservoirs. Journal of Petroleum Science and Engineering 133: 85–102. http://dx.doi.org/10.1016/j.petrol.2015.05.013.
Wattenbarger, R. A. and Alkouh, A. B. 2013. New Advances in Shale Reservoir Analysis Using Flowback Data. Presented at the SPE Eastern Regional Meeting, Pittsburgh, Pennsylvania, 20–22 August. SPE-165721-MS. http://dx.doi.org/10.2118/165721-MS.
Xia, Y., Jin, Y., Chen, M. et al. 2015. Hydrodynamic Modeling of Mud Loss Controlled by the Coupling of Discrete Fracture and Matrix. Journal of Petroleum Science and Engineering 129: 254–267. http://dx.doi.org/10.1016/j.petrol.2014.07.026.
Yu, W. and Sepehrnoori, K. 2014a. Simulation of Gas Desorption and Geomechanisc Effects for Unconventional Gas Reservoirs. Fuel 116: 455–464. http://dx.doi.org/10.1016/j.fuel.2013.08.032.
Yu, W. and Sepehrnoori, K. 2014b. Optimization of Well Spacing for Bakken Tight Oil Reservoirs. Presented at the Unconventional Resources Technology Conference, Denver, USA, 25–27 August. http://dx.doi.org/10.15530/urtec-2014-1922108.
Yue, M., Leung, J., and Dehghanpour, H. 2013. Integration of Numerical Simulations for Uncertainty Analysis of Transient Flow Responses in Heterogeneous Tight Reservoirs. Presented at the SPE Unconventional Resources Conference Canada, Calgary, 5–7 November. SPE-167174-MS. http://dx.doi.org/10.2118/167174-MS.
Yue, M., Leung, J., and Dehghanpour, H. 2016. Numerical Investigation of Limitations and Assumptions of Analytical Transient Flow Models in Tight Oil Reservoirs. Journal of Natural Gas Science and Engineering 30: 471–486. http://dx.doi.org/10.1016/j.jngse.2016.01.042.
Zanganeh, B., Ahmadi, M., Hanks, C. et al. 2014. Proper Inclusion of Hydraulic Fracture and Unpropped Zone Conductivity and Fracturing Fluid Flowback in Single Shale Oil Well Simulation. Presented at the SPE Western North American and Rocky Mountain Joint Regional Meeting, Denver, USA, 16–18 April. SPE-169511-MS. http://dx.doi.org/10.2118/169511-MS.
Zhou, X., Morrow, N. R., and Ma, S. 2000. Interrelationship of Wettability, Initial Water Saturation, Aging Time, and Oil Recovery by Spontaneous Imbibition and Waterflooding. SPE J. 5 (2): 199–207. SPE-62507-PA. http://dx.doi.org/10.2118/62507-PA.
Zou, C. 2012. Unconventional Petroleum Geology, first edition, Newnes.