Reservoir Simulation of Steam Fracturing in Early-Cycle Cyclic Steam Stimulation
- Marya Cokar (University of Calgary) | Ian D. Gates (University of Calgary) | Michael S. Kallos (University of Calgary)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- December 2012
- Document Type
- Journal Paper
- 676 - 687
- 2012. Society of Petroleum Engineers
- 5.3.4 Integration of geomechanics in models, 5.8.5 Oil Sand, Oil Shale, Bitumen, 1.2.2 Geomechanics, 5.5 Reservoir Simulation, 5.7.2 Recovery Factors, 5.4.6 Thermal Methods
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- 850 since 2007
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In cyclic steam stimulation (CSS), steam is injected above the fracture pressure into the oil-sands reservoir. In early cycles, the injected steam fractures the reservoir, creating a relatively thin dilated zone that allows rapid distribution of heat within the reservoir without excessive displacement of oil from the neighborhood of the wellbore. Numerical reservoir-simulation models of CSS that deal with the fracturing process have difficulty simultaneously capturing flowing bottomhole-pressure (BHP) behavior and steam injection rate. In this research, coupled reservoir-simulation (flow and heat transfer) and geomechanics models are investigated to model dynamic fracturing during the first cycle of CSS in an oil-sands reservoir. In Alberta, Canada, in terms of volumetric production rate, CSS is the largest thermal recovery technology for bitumen production, with production rates equal to approximately 1.3 million B/D in 2008. The average recovery factor from CSS is between 25 and 28% at the economic end of the process. This implies that the majority of bitumen remains in the ground. Because the mobility of the bitumen depends strongly on temperature, the performance of CSS is intimately linked to steam conformance in the reservoir, which is largely established during steam fracturing of the reservoir in the early cycles of the process. Thus, a fundamental understanding of the flow and geomechanical aspects of early-cycle CSS is critical. A detailed thermal reservoir-simulation model, including dilation and dynamic fracturing, was developed, with the use of a commercially available thermal reservoir simulator, to understand their effects on BHP and injection rate. The results demonstrate that geomechanics must be included to accurately model CSS. The results also suggest that the reservoir dilates during steam injection as the result of increases in reservoir temperature, which lead to thermal dilation and higher pore pressure.
|File Size||1 MB||Number of Pages||12|
Beattie, C.I., Boberg, T.C., McNab, G.S. 1991. Reservoir Simulation ofCyclic Steam Stimulation in the Cold Lake Oil Sands. SPE Res Eval &Eng 6 (2): 200-206. http://dx.doi.org/10.2118/18752-PA.
Beer, F., Johnston, E.R. Jr., DeWolf, J.T. 2006. Mechanics ofMaterials. New York: McGraw-Hill.
Boberg, T.C., and Rotter, M.B. 1990. History Match of Multiwell SimulationModels of Cyclic Steam Stimulation Process at Cold Lake. Paper SPE 20743presented at the SPE Annual Technical Conference and Exhibition, New Orleans,Louisiana, 23-26 September. http://dx.doi.org/10.2118/20743-MS.
Brissenden, S.J. 2005. Steaming Uphill: Using J-Wells for CSS at PeaceRiver. Paper presented at the Canadian International Petroleum Conference,Calgary, Alberta, Canada, 7-9 June. http://dx.doi.org/10.2118/2005-107.
Canadian Natural Resource Ltd. (CNRL) Primrose, Wolf Lake, and Burnt LakeAnnual Presentation to the EUB (2008). Submitted to the Energy Research andConservation Board. Retrieved December 2, 2011, from http://www.ercb.ca/oilsands/insitu-presentations/2007ColdLakeCNRLWolfLakePrimroseCSS9140.pdf.
Cold Lake Annual Performance Review. Cold Lake Approvals 8558 and 4510. 2007EUB Annual Performance Review. Jan 23, 2008. Submitted to the Energy Researchand Conservation Board. Retrieved September 11, 2012, from http://www.ercb.ca/data-and-publications/activity-and-data/insitu-progress.
Denbina, E.S., Boberg, T.C., Rotter, M.B. 1991. Evaluation of Key ReservoirDrive Mechanisms in the Early Cycles of Steam Stimulation at Cold Lake. SPERes Eval & Eng 6 (2): 207-211. http://dx.doi.org/10.2118/16737-PA.
Fjaer, E., Holt, R.M., Horsrud, P., et al. 2008. Petroleum Related RockMechanics, 2nd edition. Oxford: Elsevier.
Gates, I.D. 2011. Basic Reservoir Engineering. Dubuque, Iowa:Kendall-Hunt Publishing Company.
Koci, P.F., and Mohiddin, J.G. 2007. Realistic History Matching of CyclicSteam Stimulation Performance of Several Groups of Multilateral Wells in thePeace River Field, Canada. Paper SPE 107201 presented at the SPE Europec/EAGEAnnual Conference and Exhibition, London, UK, 11-14 June. http://dx.doi.org/10.2118/107201-MS.
Lebel, J.P. 2002. Dynamic Fracture Modeling Approach for Cold Lake CyclicSteam Stimulation. Paper SPE 79010 presented at SPE International ThermalOperations and Heavy Oil Symposium and International Horizontal Well TechnologyConference, Calgary, Alberta, Canada, 4-7 November. http://dx.doi.org/10.2118/79010-MS.
Lebel, J.P., and Moriyama, R.T. 1997. History Match of Mature Cyclic SteamStimulation Process at Cold Lake. Paper SPE 37549 presented at the SPEInternational Thermal Operations and Heavy Oil Symposium, Bakersfield,California, 10-12 February. http://dx.doi.org/10.2118/37549-MS.
Lijun, J. Settari, A., Sullivan, R.B., et al. 2004. Methods for ModelingDynamic Fractures in Coupled Reservoir and Geomechanics Simulation. Paper SPE90874 presented at the SPE Annual Technical Conference and Exhibition, Houston,Texas, 26-29 September. http://dx.doi.org/10.2118/90874-MS.
Scott, G.R. 2002. Comparison of CSS and SAGD Performance in ClearwaterFormation at Cold Lake. Paper SPE 79020 presented at the SPE InternationalThermal Operations and Heavy Oil Symposium and International Horizontal WellTechnology Conference, Calgary, Alberta, Canada, 4-7 November. http://dx.doi.org/10.2118/79020-MS.
Shell Recovery Process (2009). Application for Approval of the Carmon CreekProject. Volume 1: Project Description. Retrieved December 2, 2011, from http://www.shell.com/static/can-en/downloads/aboutshell/our_business/e_and_p/recovery_process_field_facilities_processing_facilities.pdf.
Settari, A., Ito Y., Fukushima, N., et al. 1993. Geotechnical Aspects ofRecovery Processes in Oil Sands. Can. Geotech. J. 30 (1):22-23. http://dx.doi.org/10.1139/t93-003.
Settari, A., Walters, D.A., Behie, G.A. 2001. Use of Coupled Reservoir andGeomechanical Modelling for Integrated Reservoir Analysis and Management. J.Cdn. Pet. Tech. 40 (12): 55-61. http://dx.doi.org/10.2118/01-12-04.
Tran, D., Nghiem, L., Buchanan, L. 2005. Improved Iterative Coupling ofGeomechanics With Reservoir Simulation. Paper SPE 93244 presented at the SPEReservoir Simulation Symposium, The Woodlands, Texas, 31 January-2 February2005. http://dx.doi.org/10.2118/93244-MS.
Tran, D., Settari, A., Nghiem, L. 2002. New Iterative Coupling Between aReservoir Simulator and a Geomechanics Module. Paper SPE 78192 presented at theSPE/ISRM Rock Mechanics Conference, Irving, Texas, 20-23 October. http://dx.doi.org/10.2118/78192-MS.
Vinsome, P.K.W., and Westerveld, J.D. 1980. A Simple Method for PredictingCap and Base Rock Heat Losses in Thermal Reservoir Simulators. J. Cdn. Pet.Tech. 19 (3): http://dx.doi.org/10.2118/80-03-04.
Walters, D.A., Settari, A., Kry, P.R. 2000. Poroelastic Effects of CyclicSteam Stimulation in the Cold Lake Reservoir. Paper SPE 62590 presented at theSPE/AAPG Western Regional Meeting, Long Beach, California, 19-23 June. http://dx.doi.org/10.2118/62590-MS.