Validation of Toe-to-Heel Air-Injection Bitumen Recovery Using 3D Combustion-Cell Results
- Malcolm Greaves (University of Bath) | Lei Lei Dong (University of Bath) | Sean Rigby (university of nottingham)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- February 2012
- Document Type
- Journal Paper
- 72 - 85
- 2012. Society of Petroleum Engineers
- 2.4.3 Sand/Solids Control, 5.4 Enhanced Recovery, 4.1.9 Heavy Oil Upgrading, 4.3.4 Scale, 5.8.5 Oil Sand, Oil Shale, Bitumen, 5.4.6 Thermal Methods
- THAI, in situ combustion, bitumen, thermal recovery, numericall simulation
- 3 in the last 30 days
- 750 since 2007
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Rigorous validation of a simulation model of the toe-to-heel air-injection (THAI) process has been performed using results obtained from a 3D combustion-cell experiment on Athabasca oil sands. The numerical model includes a new kinetics formulation, based on the Athabasca thermal-cracking kinetics scheme proposed by Phillips et al. (1985). The kinetics model excludes low-temperature oxidation because THAI operates in a high-temperature oxidation mode. Excellent agreement was obtained between the predicted and experimental oil-production rate, and there was generally a good match obtained for other dynamic variables, including the residual coke profile, produced oxygen, and peak combustion temperature. The numerical model provides a fundamental platform for upscaling to field scale that will enable fine-scale details of the process to be captured.
Simulations were performed under dry in-situ combustion (ISC) conditions at the high air-injection fluxes used in the experiment. Under these conditions, vertical-plane temperature profiles in the sandpack confirm that the combustion front is quasivertical and forward leaning in the direction of the heel of the horizontal producer well. The shape of the combustion front was predicted more accurately from horizontal-plane profiles, showing that there was no oxygen in regions ahead of the combustion front. Oil displacement occurs mainly by gravity drainage, but pressure drawdown into the horizontal producer well below the mobile-oil zone (MOZ) is also significant. Various zones that develop during the ISC process include a steam zone located in the upstream part of the MOZ. All of the mobilized oil is produced from the MOZ, which is composed of two distinct oil regions. The first part contains oil produced by thermal cracking of the heavy residue and vaporized lighter oil. The main bulk of the oil produced in THAI comes from the second region of the MOZ, containing banked original oil. The oil that is eventually produced is partially upgraded oil because of the thermally upgraded and lighter oil fractions mixing with the original oil when they enter the horizontal producer well.
|File Size||4 MB||Number of Pages||14|
Akkutlu, I.Y., and Yortsos, Y.C. 2003. The Dynamics of In-Situ CombustionFronts in Porous Media. Combust. Flame 134 (3): 229 - 247.http://dx.doi.org/10.1016/S0010-2180(03)00095-6.
Ayasse, C., Bloomer, C., Lyngberg, E., Boddy, W., Donnelly J., and Greaves,M. 2005. First Field Pilot of the THAI™ Process. Paper 2005-142 presented atthe 56th Canadian International Petroleum Conference (CIPC), Calgary, 7-9June.
Belgrave, J.D.M., Moore, R.G., Ursenbach, M.G., and Bennion, D.W.1993. A Comprehensive Approach to In-Situ Combustion Modeling. SPE AdvancedTechnology Series 1 (1): 98-107. SPE-20250-PA. http://dx.doi.org/10.2118/20250-PA.
Bousaid, I.S. and Ramey, H.J. Jr. 1968. Oxidation of Crude Oil in PorousMedia. SPE J. 8 (2): 137-148. SPE-1937-PA. http://dx.doi.org/10.2118/1937-PA.
Fatemi, S.M., Kharrat, R., and Vossoughi, S. 2008. Feasibility Studyof In-Situ Combustion (ISC) in a 2-D Laboratory-Scale Fractured System Using aThermal Reservoir Simulator. Paper 2008-449 presented at the 2008 World HeavyOil Congress (WHOC), Edmonton, Alberta, Canada, 10-12 March.
Gerritsen, M. and Kovscek, A.R. 2007. Experimental Investigation and HighResolution Simulator of In-Situ Combustion Processes. Quarterly ReportDE-FC26-03 NT15405, Department of Petroleum Engineering, Stanford University,Stanford, California (January 2007). http://www.netl.doe.gov/KMD/cds/disk37/E%20-%20PRIME%20Program/15405%20O-D%202006.pdf.
Grabowski, J.W., Vinsome, P.K., Lin, R.C., Behie, G.A., and Rubin, B. 1979.A Fully Implicit General Purpose Finite-Difference Thermal Model for In SituCombustion and Steam. Paper SPE 8396 presented at the SPE Annual TechnicalConference and Exhibition, Las Vegas, Nevada, USA, 23-26 September. http://dx.doi.org/10.2118/8396-MS.
Greaves, M., Hwessa, M., and Ayasse, C. 2006. THAI Process Development- Experiment to Pilot. Proc., 1st World Heavy Oil Conference, Beijing,12-15 November, Vol. 2, Paper 2006-407, 742-755.
Greaves, M., Xia, T.X., and Ayasse, C. 2005. Underground Upgrading ofHeavy OIl Using THAI- "Toe-to-Heel Air Injection". Paper SPE 97728 presented atthe SPE/PS-CIM/CHOA International Thermal Operations and Heavy Oil Symposium,Calgary, 1-3 November. http://dx.doi.org/10.2118/97728-MS.
Greaves, M., Xia, T.X., Turta, A.T., and Ayasse, C. 2000. Recent LaboratoryResults of THAI and Its Comparison with Other IOR Processes. Paper SPE 59334presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, 3-5 April. http://dx.doi.org/10.2118/59334-MS.
Hayashitani, M., Bennion, D.W., Donnelly, J.K., and Moore, R.G. 1978.Thermal Cracking Models for Athabasca Oil Sands Oil. Paper SPE 7549 presentedat the SPE Annual Fall Technical Conference and Exhibition, Houston, 1-3October. http://dx.doi.org/10.2118/7549-MS.
Kumar, M. 1987. Simulation of Laboratory In-situ Combustion Data and Effectof Process Variation. Paper SPE 16027 presented at the SPE Symposium onReservoir Simulation, San Antonio, Texas, USA, 1-4 February. http://dx.doi.org/10.2118/16027-MS.
Moore, R.G., Mehta, S.A.R., Ursenbach, M.G., and Laureshen, C.J. 1998.Strategies for Successful Air Injection Projects. Paper No. 1998-235 presentedat the 7th UNITAR Heavy Crude and Tar Sands Conference, Beijing, 27-30October.
Oswald, R.J. et al. 2010. Revival of Mature Oil Fields in OMV PetromS.A. by Intensification of IOR/EOR Methods. Paper presented at the Global IOR& EOR Forum, Amsterdam, 29 November-1 December.
Phillips, C.R., Haidar, N.I., and Poon, Y.C. 1985. Kinetic Models for theThermal Cracking of Athabasca Bitumen: The Effect of the Sand Matrix.Fuel 64 (5): 678-691. http://dx.doi.org/10.1016/0016-2361(85)90055-9.
Turta, A.T. and Singhal, A.K. 2004. Overview of Short-Distance OilDisplacement Processes. J Can Pet Technol 43 (2): 29-37.JCPT Paper No. 04-02-02. http://dx.doi.org/10.2118/04-02-02.
Xia, T.X. and Greaves, M. 2001. 3-D Physical Model Studies of DownholeCatalytic Upgrading of Wolf Lake Heavy Oil Using THAI. Paper CIPC 2001-017presented at the Canadian International Petroleum Conference, Calgary, 12-14June. http://dx.doi.org/10.2118/2001-017.
Xia, T.X., M., G., Turta, A.T., and Ayasse, C. 2003. Thai: A "Short-DistanceDisplacement" In Situ Combustion Process for the Recovery and Upgrading ofHeavy Oil. Chem. Eng. Res. Des. 81 (3): 295-304.
Yang, X. and Gates, I.D. 2009. Combustion Kinetics of Athabasca Bitumen from1D Tube Experiments. Nat. Resour. Res. 18 (3): 193-211.