Practical Control of SAGD Wells With Dual-Tubing Strings
- Terry W. Stone (Schlumberger Information Solutions) | George Brown (Schlumberger Engineering Manufacturing and Sustaining) | Baris Guyaguler (Chevron Energy Technology Company) | William J. Bailey (Schlumberger-Doll Research) | David H.S. Law (Schlumberger Data & Consulting Services)
- Document ID
- Society of Petroleum Engineers
- Journal of Canadian Petroleum Technology
- Publication Date
- January 2014
- Document Type
- Journal Paper
- 32 - 47
- 2014.Society of Petroleum Engineers
- 5.3.9 Steam Assisted Gravity Drainage
- none provided
- 13 in the last 30 days
- 621 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Practical methods of operating dual-/triple-tubing strings, on the basis of temperature monitoring that is currently available, to achieve uniform steam-chamber development and enhanced production in a steam-assisted-gravity-drainage (SAGD) process, are presented. The work is motivated by the fact that numerous operators use dual-tubing strings for designing and optimizing steam-chamber development. Flow in the region of the SAGD horizontal well pair is often irregular, and dual-tubing strings may help to even out and improve both injection and production. Problems that operators have with multiple tubing strings in wells include their control and design. In this work, the injector and the producer will have two tubing strings each: one landed at the toe and the other at the heel. Control points are applied on each injection tubular. Injection at these control points is regulated by a proportional- integral-derivative (PID) feedback controller monitoring temperature differences between injected and produced fluids. A brief examination and discussion of the performance of control points in the production tubulars are also included. The PID controller will attempt to accomplish two goals: (i) to achieve evenness in injection and production conformance along both wells and (ii) to enforce a specified temperature offset between the injector and producer in order to improve oil production and reduce steam production and injection. Sensitivity of the feedback controller will be examined for (a) heterogeneity where several synthetic permeability patterns will be tested to gauge the effectiveness of coping with reservoir complexity, (b) update frequency where a comparison will be made between instantaneous and periodic updating of the controller error terms, and (c) ability of the controller to cope with early temperature rises in produced fluids. Well monitoring is accomplished through the use of high-temperature fibre-optic temperature sensing that is currently available. Results and further discussion are offered on whether an additional tubular landed at the midpoint of both wells will benefit production from a heterogeneous reservoir.
|File Size||1 MB||Number of Pages||16|
Åström, K. and Hägglund, T. 1995. PID Controllers: Theory, Design, and Tuning, second edition. Research Triangle Park, North Carolina: ISA.
Brown, G. 2010. Therma 4.0 User Reference Manual. Sugar Land, Texas: Schlumberger.
Butler, R.M. 1989. Distinguished Author Series: SAGD Comes of AGE! J Can Pet Technol 37 (7): 9–12.
Carnahan, B.D., Clanton, R.W., Koehler, K.D. et al. 1999. Fiber Optic Temperature Monitoring Technology. Presented at the SPE Western Regional Meeting, Anchorage, 26-27 May. SPE-54599-MS. http://dx.doi.org/10.2118/54599-MS.
Chen, Q., Gerritsen, M.G., and Kovscek, A.R. 2008. Effects of Reservoir Heterogeneities on the Steam-Assisted Gravity-Drainage Process. SPE Res Eval & Eng 11 (5): 921-932. SPE-109873-PA. http://dx.doi.org/10.2118/109873-PA.
Cokar, M. and Graham, J. 2010. Optimization of SAGD Wellbore Completions: Short-Production-Tubing-String Sensitivities. SPE Prod & Oper 25 (1): 50-58. SPE-117854-PA. http://dx.doi.org/10.2118/117854-PA.
DeBaun, D.Byer, T.Childs, P. et al. 2005. An Extensible Architecture for Next Generation Scalable Parallel Reservoir Simulation. Presented at the SPE Reservoir Simulation Symposium, Houston, 31 January–2 February. SPE 93274. http://dx.doi.org/10.2118/93274-MS.
Edmunds, N.R., Haston, J.A., and Cordell, G.M. 2006. Steaming Process, Involving a Pair of Horizontal Wells, for Use in Heavy Oil Reservoir. Canadian Patent No. CA 1304287.
Edmunds, N.R. 1998. Investigation of SAGD Steam Trap Control in Two and Three Dimensions. Presented at the SPE International Conference on Horizontal Well Technology, Calgary, 1–4 November. SPE-50413-MS. http://dx.doi.org/10.2118/50413-MS.
Gates, I.D., Kenny, J., Hernandez-Hdez, I.L. et al. 2007. Steam Injection Strategy and Energetics of Steam-Assisted Gravity Drainage. SPE Res Eval & Eng 10 (1): 19-34. SPE-97742-PA. http://dx.doi.org/10.2118/97742-PA.
Gates, I.D. and Chakrabarty, N. 2006. Optimization of Steam Assisted Gravity Drainage in McMurray Reservoir. J Can Pet Technol 45 (9): 54–62. JCPT Paper No. 06-09-05. http://dx.doi.org/10.2118/06-09-05.
Gotawala, D.R. and Gates, I.D. 2009. SAGD Subcool Control with Smart Injection Wells. Presented at the EUROPEC/EAGE Conference and Exhibition, Amsterdam, 8-11 June. SPE-122014-MS. http://dx.doi.org/10.2118/122014-MS.
Güyagüler, B., Papadopoulos, A.T., and Philpot, J.A. 2010. Feedback Controllers for the Simulation of Field Processes. SPE Res Eval & Eng 13 (1): 10-23. SPE-118969-PA. http://dx.doi.org/10.2118/118969-PA.
Handfield, T.C., Nations, T., and Noonan, S.G. 2009. SAGD Gas Lift Completions and Optimization: A Field Case Study at Surmount. J Can Pet Technol 48 (11): 51-54. SPE-117489-PA. http://dx.doi.org/10.2118/117489-PA.
Holmes, J.A. 2001. Modeling Advanced Wells in Reservoir Simulation. J Pet Technol 53 (11): 54-60. SPE-72493-MS. http://dx.doi.org/10.2118/72493-MS.
Holmes, J.A., Byer, T.J., Edwards, D.A. et al. 2010. A Unified Wellbore Model for Reservoir Simulation. Presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19-22 September. SPE-134928-MS. http://dx.doi.org/10.2118/134928-MS.
Krawchuk, P., Beshry, M.A., Brown, G.A. et al. 2006. Predicting the Flow Distribution on Total E&P Canada's Joslyn Project Horizontal SAGD Producing Wells Using Permanently Installed Fiber-Optic Monitoring. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 24–27 September. SPE-102159-MS. http://dx.doi.org/10.2118/102159-MS.
Prats, M. 1986. Thermal Recovery, No. 7. Richardson, Texas: Monograph Series, SPE.
Schlumberger. 2013. Well Completions, http://www.slb.com/services/completions.aspx (accessed 2010).
Schlumberger. 2009. WellWatcher BriteBlue HT: High-temperature, harsh environment multimode fiber http://www.slb.com/~/media/Files/completions/product_sheets/wellwatcher_briteblue_ht.pdf (accessed 2011).
Shi, X., Chang, Y.-B., Muller, M. et al. 2009. A General Unstructured Grid, Parallel, Fully Implicit Thermal Simulator and Its Application for Large Scale Thermal Models. Presented at the SPE Reservoir Simulation Symposium, The Woodlands, Texas, USA, 2-4 February. SPE-119172-MS. http://dx.doi.org/10.2118/119172-MS.
Stone, T.W., Bennett, J., Law, D.H.S. et al. 2002. Thermal Simulation With Multisegment Wells. SPE Res Eval & Eng 5 (3): 206-218. SPE-78131-PA. http://dx.doi.org/10.2118/78131-PA.
Stone, T.W., Naccache, P.F., Neylon, K.J. et al. 2010a. Dynamic and Static Thermal Well Flow Control Simulation. Presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, Barcelona, Spain, 14-17 June. SPE-130499-MS. http://dx.doi.org/10.2118/130499-MS.
Stone, T.W., Yardumian, H.E., Bailey, W.J. et al. 2010b. Dynamic SAGD Well Flow Control Simulation. Presented at the Canadian Unconventional Resources and International Petroleum Conference, Calgary, 19-21 October. SPE-138054-MS. http://dx.doi.org/10.2118/138054-MS.
Stone, T.W., Bennett, J., Edwards, D.A. et al. 2011. A Unified Thermal Wellbore Model for Flexible Simulation of Multiple Tubing Strings. Presented at the SPE Reservoir Simulation Symposium, The Woodlands, Texas, USA, 21-23 February. SPE-142153-MS. http://dx.doi.org/10.2118/142153-MS.
Stone, T.W., Bailey, W.J., Couet, B. et al. 2012. Semi-Optimal Control of Single and Multiple Inflow Control Valves in Production Wells. Presented at the 2012 World Heavy Oil Congress, Aberdeen, Scotland, UK, 10-13 September. Paper No. WHOC12-297.
Stone, T.W. and Bailey, W.J. 2014. Optimization of Subcool in SAGD Bitumen Processes. Prepared for presentation at the 2014 World Heavy Oil Congress, New Orleans, 5-7 March. Paper No. WHOC14-271.
Weaver, M.A., Kragas, T.K., Burman, J. et al. 2005. Installation and Application of Permanent Downhole Optical Pressure/Temperature Gauges and Distributed Temperature Sensing in Producing Deepwater Wells at Marco Polo. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, USA, 9-12 October. SPE-95798-MS. http://dx.doi.org/10.2118/95798-MS.