Improving recovery efficiency by CO2 injection at late stage of steam assisted gravity drainage
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Abstract
The high recovery performance of steam-assisted gravity drainage (SAGD) makes it a popular option for heavy oil resources. Currently, most of the heavy oil reservoirs developed by SAGD in China are in the late development phase, with high energy consumption due to reduced thermal efficiency. The use of SAGD wind-down processes involving CO2 in combination with steam for heavy oil recovery is considered as a viable alternative to limit energy consumption, and also reduce the amount of greenhouse gas emissions by leaving CO2 behind in the reservoir. Study reveals that the dissolution and demulsification of CO2 steam chamber temperature reaches 200 ◦C, the amount of solid phase deposition induced in crude oil can reduce the viscosity of emulsified heavy oil by more than 50%. When the by CO2 extraction is only 0.016 kg/m3 , the rock wettability changes from lipophilic to hydrophilic, and the higher the reservoir temperature, the stronger the hydrophilicity is, which reduces the adhesion power of the oil phase and facilitates the stripping of crude oil from the rock surface. Numerical simulation studies have been carried out utilizing STARS to obtain energy efficient utilization and improved steam chamber characteristics. Heat loss from SAGD baseline is 1.77 times that with CO2 injection process, but the recovery factor is only 2.48% higher. At the initial stage with CO2 injection, the steam chamber continues its lateral expanding, which increases the recovery factor at the initial stage of CO2 injection by about 6%. One year after CO2 injection, gas channeling results in lower recovery than traditional SAGD process, and 38.4% of the injected CO2 is stored in the reservoir from this study.
Cited as: Gong, H., Yu, C., Jiang, Q., Su, N., Zhao, X., Fan, Z. Improving recovery efficiency by CO2 injection at late stage of steam assisted gravity drainage. Advances in Geo-Energy Research, 2022, 6(4): 276-285. https://doi.org/10.46690/ager.2022.04.02
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Ali, S. B., Olushola, G. S., Eric, J. M. Performance analysis of SAGD wind-down process with CO2 injection. Paper SPE 113234 Presented at Symposium on Improved Oil Recovery, Tulsa, Oklahoma, 20-23 April, 2008.
Ameri, A., Farajzadeh, R., Shojai, K. N., et al. Effect of matrix wettability CO2 assisted gas-oil garvity drainage in naturally fractured reservoirs. Paper Presented at 77th EAGE Conference and Exhibition, Madrid, Spain, 1-4 June, 2015.
Butler, R. M. The steam and gas push (SAGP). Journal of Canadian Petroleum Technology, 1999, 38(3): 47-54.
Butler, R. M., Stephens, D. J. The gravity drainage of steam-heated heavy oil to parallel horizontal wells. Journal of Canadian Petroleum Technology, 1981, 20(2): 90-96.
Daniel, J. S. Greenhouse gas sources and mitigation strategies from a geosciences perspective. Advances in Geo-Energy Research, 2021, 5(3): 274-285.
Davarpanah, A., Mirshekari, B. Experimental study of CO2 solubility on the oil recovery enhancement of heavy oil reservoirs. Journal of Thermal Analysis and Calorimetry, 2020, 139(2): 1161-1169.
Dong, X., Liu, H., Chen, Z., et al. Enhanced oil recovery techniques for heavy oil and oilsands reservoirs after steam injection. Applied Energy, 2019, 239: 1190-1211.
Ehsan, A., Belenitza, S. D., Sudarshan, R. M., et al. Evaluation of air injection into mature SAGD chambers as a follow up/wind-down strategy, Using a novel large scale 3-D physical model. Paper SPE 196049 Presented at Annual Technical Conference and Exhibition, Calgary, Alberta, 30 September-2 October, 2019.
Fan, Y., Mei, L., Liu, H. Geochemical characteristics and accumulated process of heavy crude oil of Chunguang oilfield in Junggar Basin, China. Journal of Earth Science, 2016, 27: 846–855.
Fang, T., Shi, J., Sun, X., et al. Supercritical CO2 selective extraction inducing wettability alteration of oil reservoir. Journal of Supercritical Fluids, 2016, 113: 10-15.
Gu, F. G., Chan, M., Rismyhr, O., et al. Optimization of SAGD wind-down and blow-down for Athabasca oil sands. Paper SPE 165481 Presented at Heavy Oil Conference-Canada, Calgary, Alberta, 11-13 June, 2013.
He, J., Li, M., Zhou, K., et al. Effects of vugs on resistivity of vuggy carbonate reservoirs. Petroleum Exploration and Development, 2020a, 47(3): 527-535.
He, J., Li, M., Zhou, K., et al. Radial resistivity measurement method for cylindrical core samples. Interpretation, 2020b, 8(4): 1071-1080.
Hosseinpour, M., Hajialirezaei, A. H., Soltani, M., et al. Thermodynamic analysis of in-situ hydrogen from hot compressed water for heavy oil upgrading. International Journal of Hydrogen Energy, 2019, 44(51): 27671-27684.
Hu, Y., Hao, M., Chen, G., et al. Technologies and practice of CO2 flooding and sequestration in China. Petroleum Exploration and Development, 2019, 46(4): 753-766.
Kong, D. B., Gao, Y. B., Hemanta, S., et al. Experimental investigation of immiscible water-alternating-gas injection in ultra-high water-cut stage reservoir. Advances in Geo-Energy Research, 2021, 5(2): 139-152.
Li, N., Tan, X., Ren, Z. Micro-sweep characteristics of CO2 flooding. Chemistry and Technology of Fuels and Oils, 2020, 56(4): 658-664.
Li, S., Yu, T., Li, Z., et al. Experimental investigation of nitrogen-assisted SAGD in heavy-oil reservoirs: A two-dimensional visual analysis. Fuel, 2019, 257: 116013.
Mohammad, J. Steam alternating non-condensable gas injec-tion for more heavy oil recovery. Energy, 2022, 240: 122476.
Reid, R. C., Sherwood, T. K., Prausnitz, J. M. The Properties of Gases and Liquids. New York, USA, McGraw-Hill Education, 1977.
Ren, J., Wang, T., Chen, Y., et al. Research status and application potential of CO2 mineralization. Earth Science, 2020, 45(7): 2413-2425. (in Chinese)
Seyyed, M. S., Mehran, S. Intermittent CO2 and viscosity-reducing gas (VRG) injection for enhanced heavy oil recovery. Fuel Processing Technology, 2017, 164: 1-12.
Song, Z. Y., Zhu, W. Y., Wang, X., et al. 2-D pore-scale experimental investigations of asphaltene deposition and heavy oil recovery by CO2 flooding. Energy & Fuels, 2018, 32(3): 3194-3201.
Wang, F., Mou, Z., Liu, P., et al. Experiment and numerical simulation on mechanism of CO2 assisted mining in super heavy oil reservoirs. Petroleum Geology and Recovery Efficiency, 2017, 24(6): 86-91. (in Chinese)
Wang, H. Y., Torabi, F., Zeng, F. H., et al. Experimental and numerical study of non-equilibrium dissolution and exsolution behavior of CO2 in a heavy oil system utilizing Hele-Shaw-like visual cell. Fuel, 2020, 270: 117501.
Watheq, J. A., Andrew, K. W. Field-scale evaluation of re-injecting the associating produced gas through the GDWS-AGD EOR process. Paper SPE 195470 Presented at Europec featured at 81st EAGE Conference and Exhibition, London, England, 3-6 June, 2019.
Xi, C., Qi, Z., Zhang, Y., et al. CO2 assisted steam flooding in late steam flooding in heavy oil reservoirs. Petroleum Exploration and Development, 2019, 46(6): 1242-1250.
Zanganeh, P., Dashti, H., Ayatollahi, S. Visual investigation and modeling of asphaltene precipitation and deposition during CO2 miscible injection into oil reservoirs. Fuel, 2015, 160: 132-139.
Zhang, Y. J., Shen, D. H., Gao, Y. R., et al. Physical simulation experiments on CO2 injection technology during steam assisted gravity drainage process. Acta Petrolei Sinica, 2014, 35(6): 1147-1152. (in Chinese)
Zhao, L., Law, D. H. S., Coates, R. Numerical study and economic evaluation of SAGD wind-down methods. The Journal of Canadian Petroleum Technology, 2003, 42(1): 53-57.
Zhao, L., Law, D. H. S., Nasr, T. N. SAGD wind-down: Lab test and simulation. The Journal of Canadian Petroleum Technology, 2005, 44(1): 49-53.
DOI: https://doi.org/10.46690/ager.2022.04.02
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