The Effect of Fracture-Face Matrix Damage on Productivity of Fractures With Infinite and Finite Conductivities in Shale-Gas Reservoirs
- Jun Li (China University of Petroleum, Beijing) | Boyun Guo (University of Louisiana at Lafayette) | Deli Gao (China University of Petroleum, Beijing) | Chi Ai (Eastnorth Petroleum University)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- September 2012
- Document Type
- Journal Paper
- 348 - 354
- 2012. Society of Petroleum Engineers
- 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 4.6 Natural Gas, 4.1.2 Separation and Treating, 5.8.2 Shale Gas, 4.3.4 Scale, 1.8 Formation Damage, 2.5.2 Fracturing Materials (Fluids, Proppant)
- 6 in the last 30 days
- 2,427 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Producing natural gas from shale-gas reservoirs presents a great challenge to petroleum engineers owing to the low-permeability nature of this type of gas reservoir. Large-scale and expensive hydraulic-fracturing operations are often required for enhancing gas well productivity. Because of the shaly characteristics of the reservoir rock, the hydraulically fractured gas wells are vulnerable to damage by fracturing fluids. However, the true significance of the formation damage in shale-gas reservoirs is still not clear. It is highly desirable to have a simple method for predicting the degree of fracture-face matrix damage and for optimizing fracturing treatments. This paper is meant to fill this gap.
A new mathematical model was developed in this study to predict the effect of fracture-face matrix damage on the productivity of fractured gas wells in shale-gas reservoirs. A unique feature of the new model is that it considers reservoir/fracture crossflow in finite-conductivity fractures. Results of the model analyses were sensitized to reservoir properties and facture-face matrix-skin properties determined by the fracturing-fluid properties and treatment conditions. Large ranges of possible leakoff and spurt-loss coefficients were investigated. We concluded that, in the ranges of reservoir and fluid properties used in this study, well productivity should drop by less than 15% even if the residual matrix permeability is reduced to only 5% of the virgin reservoir permeability in the damage zone. Neglecting the resistance to flow in the fracture will overestimate the effect of matrix damage on well productivity. The well-productivity drop caused by matrix damage is most sensitive to the invasion depth and damaged permeability.
|File Size||2 MB||Number of Pages||7|
Economides, M.J., Hill, A.D., and Ehlig-Economides, C. 1993. PetroleumProduction Systems, 449-451. Englewood Cliffs, New Jersey: PetroleumEngineering Series, Prentice Hall.
Ehlig-Economides, C.A. and Economides, M.J. 2011. Water As Proppant. PaperSPE 147603 presented at the SPE Annual Technical Conference and Exhibition,Denver, 1 January. http://dx.doi.org/10.2118/147603-MS.
Energy Information Administration (EIA). 2011. Annual Energy Outlook 2011with Projections to 2035. Annual Report No. DOE/EIA-0383(2011), EIA/US DOE,Washington, DC (March 2011).
Gdanski, R., Weaver, J., Slabaugh, B. et al. 2005. Fracture Face Damage--ItMatters. Paper SPE 94649 presented at the SPE European Formation DamageConference, Scheveningen, The Netherlands, 25-27 May. http://dx.doi.org/10.2118/94649-MS.
Guo, B. and Schechter, D.S. 1997. A Simple and Rigorous Mathematical Modelfor Estimating Inflow Performance of Wells Intersecting Long Fractures. PaperSPE 38104 presented at the SPE Asia Pacific Oil and Gas Conference andExhibition, Kuala Lumpur, 14-16 April. http://dx.doi.org/10.2118/38104-MS.
Guo, B., Sun, K., and Ghalambor, A. 2008. Well ProductivityHandbook, 224-225. Houston, Texas: Gulf Publishing Company.
Holditch, S.A. 1979. Factors Affecting Water Blocking and Gas Flow FromHydraulically Fractured Gas Wells. J Pet Technol 31 (12):1515-1524. SPE-7561-PA. http://dx.doi.org/10.2118/7561-PA.
Holditch, S.A. and Tschirhart, N.R. 2005. Optimal Stimulation Treatments inTight Gas Sands. Paper SPE 96104 presented at the SPE Annual TechnicalConference and Exhibition, Dallas, 9-12 October. http://dx.doi.org/10.2118/96104-MS.
Joshi, S.D. 1988. Augmentation of Well Productivity with Slant andHorizontal Wells. J Pet Technol 40 (6): 729-739.SPE-15375-PA. http://dx.doi.org/10.2118/15375-PA.
Li, H., Jia, Z., and Wei, Z. 1996. A New Method to Predict Performance ofFractured Horizontal Wells. Paper SPE 37051 presented at the InternationalConference on Horizontal Well Technology, Calgary, 18-20 November. http://dx.doi.org/10.2118/37051-MS.
Osholake, T.A., Wang, J.Y., and Ertekin, T. 2011. Factors AffectingHydraulically Fractured Well Performances in the Marcellus Shale GasReservoirs. Paper SPE 144076 presented at the North American Unconventional GasConference and Exhibition, The Woodlands, Texas, USA, 14-16 June. http://dx.doi.org/10.2118/144076-MS.
Papatzacos, P. 1987. Exact Solutions for Infinite-Conductivity Wells. SPERes Eng 2 (2): 217-226. SPE-13846-PA. http://dx.doi.org/10.2118/13846-PA.
Polczer, S. 2009. Shale expected to supply half of North America's gas.Calgary Herald, 9 April 2009.
Raghavan, R. and Joshi, S.D. 1993. Productivity of Multiple Drainholes orFractured Horizontal Wells. SPE Form Eval 8 (11): 11-16.SPE-21263-PA. http://dx.doi.org/10.2118/21263-PA.
Romero, D.J., Valko, P.P., and Economides, M.J. 2003. Optimization of theProductivity Index and the Fracture Geometry of a Stimulated Well With FractureFace and Choke Skins. SPE Prod & Oper 18 (1): 57-64.SPE-81908-PA. http://dx.doi.org/10.2118/81908-PA.
Song, B. and Ehlig-Economides, C.A. 2011. Rate-Normalized Pressure Analysisfor Determination of Shale Gas Well Performance. Paper SPE 144031 presented atthe North American Unconventional Gas Conference and Exhibition, The Woodlands,Texas, USA, 14-16 June. http://dx.doi.org/10.2118/144031-MS.
van Poolen, H.K. 1957. Do Fracture Fluids Damage Productivity? Oil GasJ. 55 (19 April 1957).
Volk, L.J., Gall, B.L., Raible, C.J. et al. 1983. A Method for Evaluation ofFormation Damage Due to Fracturing Fluids. Paper SPE 11638 presented at theSPE/DOE Low Permeability Gas Reservoirs Symposium, Denver, 14-16 March. http://dx.doi.org/10.2118/11638-MS.
Wan, J. and Aziz, K. 2002. Semi-Analytical Well Model of Horizontal wellswith Multiple Hydraulics Fractures. SPE J. 7 (4): 437-445.SPE-81190-PA. http://dx.doi.org/10.2118/81190-PA.
Wang, J.Y., Holditch, S., and McVay, D. 2010. Modeling Fracture-FluidCleanup in Tight-Gas Wells. SPE J. 15 (3): 783-793.SPE-119624-PA. http://dx.doi.org/10.2118/119624-PA.
Wang, Y., Holditch, S.A., and McVay, D.A. 2008. Simulation of Gel Damage onFracture Fluid Cleanup and Long-Term Recovery in Tight Gas Reservoirs. PaperSPE 117444 presented at the SPE Eastern Regional/AAPG Eastern Section JointMeeting, Pittsburgh, Pennsylvania, USA, 11-15 October. http://dx.doi.org/10.2118/117444-MS.
Wei, Y. and Economides, M.J. 2005. Transverse Hydraulic Fractures From aHorizontal Well. Paper SPE 94671 presented at the SPE Annual TechnicalConference and Exhibition, Dallas, 9-12 October. http://dx.doi.org/10.2118/94671-MS.
Xiong, H. and Holditch, S.A. 1995. A Comprehensive Approach to FormationDamage Diagnosis and Corresponding Stimulation Type And Fluid Selection. PaperSPE 29531 presented at the SPE Production Operations Symposium, Oklahoma City,Oklahoma, USA, 2-4 April. http://dx.doi.org/10.2118/29531-MS.
Xiong, H., Davidson, B., Saunders, B. et al. 1996. A Comprehensive Approachto Select Fracturing Fluids and Additives for Fracture Treatments. Paper SPE36603 presented at the SPE Annual Technical Conference and Exhibition, Denver,6-9 October. http://dx.doi.org/10.2118/36603-MS.
Xiong, H. and Holditch, S.A. 1995. A Comprehensive Approach to FormationDamage Diagnosis and Corresponding Stimulation Type And Fluid Selection, paperSPE 29531 presented at the SPE Production Operations Symposium held 2-4 April1995 in Oklahoma City, Oklahoma. SPE-29531-MS.