Special Considerations in the Design Optimization of the Production Casing in High-Rate, Multistage-Fractured Shale Wells
- Catherine Sugden (Blade Energy Partners) | John Johnson (Exco Resources) | Mike Chambers (Exco Resources) | Gary Ring (Blade Energy Partners) | P.V. Suryanarayana (Blade Energy Partners)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- December 2012
- Document Type
- Journal Paper
- 459 - 472
- 2012. Society of Petroleum Engineers
- 2 Well Completion, 2.5.4 Multistage Fracturing, 1.14.1 Casing Design, 1.14 Casing and Cementing
- 9 in the last 30 days
- 1,007 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Typical shale well completions involve massive, multistage fracturing in horizontal wells. Aggressive trajectories (with up to 20°/100 ft doglegs), multistage high-rate fracturing (up to 20 stages, 100 bbl/min), and increasing temperature and pressure of shale reservoirs result in large thermal and bending stresses that are critical in the design of production casing. In addition, when cement voids are present and the production casing is not restrained during fracturing, thermal effects can result in magnified load conditions. The resulting loads can be well in excess of those deemed allowable by regular casing design techniques. These loads are often ignored in standard well design, exposing casing to the risk of failure during multistage fracturing. In this work, the major factors influencing normal and special loads on production casing in shale wells are discussed. A method for optimization of shale well production casing design is then introduced. The constraints on the applicability of different design options are discussed. Load-magnification effects of cement voids are described, and a method for their evaluation is developed. Thermal effects during cooling are shown to create both bending stress magnification and annular pressure reduction caused by fluid contraction in trapped cement voids. This can result in significant loads and new modes of failure that must be considered in design. The performance of connections under these loads is also discussed. Examples are provided to illustrate the key concepts described. Finally, acceptable design options for shale well production casing are discussed. The results presented here are expected to improve the reliability of shale well designs. They provide operators with insight into load effects that must be onsidered in the design of production casing for such wells. By understanding the causes and magnitude of load-augmentation effects, operators can manage their design and practices to ensure well integrity.
|File Size||1 MB||Number of Pages||14|
Adams, A., and MacEachran, A. 1994. Impact on Casing Design of ThermalExpansion of Fluids on Confined Annuli. SPE Drill & Compl 9 (3): 210-216. http://dx.doi.org/10.2118/21911-PA.
Bern, P.A., van Oort, E., Neusstadt, B. 1998. Barite Sag: Measurement,Modeling and Management. IADC/Paper SPE 47784 presented at the IADC/SPE AsiaPacific Drilling Conference, Jakarta, Indonesia, 7-9 September. http://dx.doi.org/10.2118/47784-MS.
Clark, C.H. 1987. Mechanical Design Considerations for Fracture-TreatingDown Casing Strings. 14370. SPE Drill Eng. 2 (2): 116-126.http://dx.doi.org/10.2118/14370-PA.
Cramer, D.D. 2008. Stimulating Unconventional Reservoirs: Lessons Learned,Successful Practices, Areas for Improvement. Paper SPE 114172 presented at the2008 SPE Unconventional Reservoirs Conference, Keystone, Colorado, February10-12. http://dx.doi.org/10.2118/114172-MS.
Hasan, A.R., and Kabir, C.S. 2002. Fluid Flow and Heat Transfer inWellbores. Richardson, Texas: Society of Petroleum Engineers.
Heathman, J., and Beck, F.E. 2006. Finite Element Analysis Couples Casingand Cement Design for HTHP Wells in East Texas. Paper SPE 98869 presented atIADC/SPE Drilling Conference, Miami, Florida, 21-23 February. http://dx.doi.org/10.2118/98869-MS.
Ketter, A.A., Daniels, J.L., Henize, J.R., et al. 2006. A Field StudyOptimizing Completion Strategies for Fracture Initiation in Barnett ShaleHorizontal Wells. Paper SPE 103232 presented at the 2006 SPE Annual TechnicalConference and Exhibition, San Antonio, Texas, 24-27 September. http://dx.doi.org/10.2118/103232-MS.
Levine, D.C., Thomas, E.W., Bezner, H.P., et al. 1979. Annular Gas FlowAfter Cementing: A Look at Practical Solutions. Paper SPE 8255 presented at theSPE Annual Technical Conference and Exhibition, Las Vegas, Nevada, 23-26September. http://dx.doi.org/10.2118/8255-MS.
Lewis, D.B., and Miller, R.A. 2009. Casing Design. In Advanced Drillingand Well Technology, ed. B.S. Aadnoy, I. Cooper, S.Z. Miska, et al., 17-83.Richardson, Texas: Society of Petroleum Engineers.
Lubinski, A. 1977. Fatigue of Range 3 Drill Pipe. Revue de l'InstitutFrancais du Petrole. 32: 2.
McDaniel, B.W., and Rispler, K. 2009. Horizontal Wells With Multistage FracsProve to Be Best Economic Completion for Many Low-Permeability Reservoirs.Paper SPE 125903 presented at the SPE Eastern Regional Meeting, Charleston,West Virginia, 23-25 September. http://dx.doi.org/10.2118/125903-MS.
Mitchell, R.F. 1982. Buckling Behavior of Well Tubing: The Packer Effect.SPE J. 22 (5): 616-624. http://dx.doi.org/10.2118/9264-PA.
Nelson, S.G., and Huff, C.D. 2009. Horizontal Woodford Shale CompletionCementing Practices in the Arkoma Basin, Southeast Oklahoma. Paper SPE 120474presented at the SPE Production and Operations Symposium, Oklahoma City,Oklahoma, 4-8 April 2009. http://dx.doi.org/10.2118/120474-MS.
Pasley, P.R., and Cernocky, E.P. 1991. Bending Stress Magnification inConstant Curvature Doglegs With Impact on Drillstring and Casing. Paper SPE22547 presented at the SPE Annual Technical Conference and Exhibition of theSociety of Petroleum Engineers, Dallas, Texas, October 6-9. http://dx.doi.org/10.2118/22547-MS.
Pope, C., Peters, B., Benton, T., et al. 2009. Haynesville Shale--OneOperator's Approach to Well Completions in This Evolving Play. Paper SPE 125079presented at the SPE Annual Technical Conference and Exhibition, New Orleans,Louisiana, 4-7 October. http://dx.doi.org/10.2118/125079-MS.
Ramey, H.J. Jr. 1962. Wellbore Heat Transmission. J Pet Tech. 14 (4): 427-435. http://dx.doi.org/10.2118/96-PA.
Schwind, B.E, and Wooley, G.R. 1989. New Findings on Leak Resistance of API8-Round Connections. SPE Prod Eng. 4 (4): 466-472. http://dx.doi.org/10.2118/15515-PA.
Shigley, J.E., and Mitchell, L. 1993. Mechanical Engineering Design,fourth edition. New York: McGraw Hill.
Suryanarayana, P.V., and Bjorkevoll, K. 2009. Design Considerations forHigh-Pressure/High-Temperature Wells. In Advanced Drilling and WellTechnology, ed. B.S. Aadnoy, I. Cooper, S.Z. Miska, et al., 641-675.Richardson, Texas: Society of Petroleum Engineers.
Thomas, P.D., and Bartok, A.W. 1941. Leak Resistance of Casing Joints inTension. Presented at the 22nd Annual Meeting of the American PetroleumInstitute, San Francisco, California, 1941.