Heated Area and Well Performance Analysis of Injection N2 and CO2 in Cycle Steam Stimulation Process

Tinghui HU, Dong LIU, Yu WANG, Chuanjun WANG, Laiyong CHEN, Daming XU

Abstract


Application of steam injection technology to heavy oil reservoirs is the most commercially successful EOR method. Cycle steam stimulation (CSS) is known as the most widely used and mature technology compared with various thermal methods. Because of various reasons, such as too high initial oil viscosity, excessive overburden heat loss and so on, in CSS, the radius of heated zone is small and the viscosity of heavy oil still cannot be lowered effectively, which leads to the low oil productivity and poor oil well performance. A variation on CSS process is to add N2 and CO2 in steam injection. Because of the influence of the N2 and CO2, the heated area and well performance of N2 and CO2 assisted CSS are different from that of steam stimulation. Therefore, this paper describes a detailed study of N2 and CO2 influence to cycle steam stimulation. In this paper, the physical simulation experiments of N2 and CO2 influence to the mixture of heavy oil are carried out at first. Through physical experiments, the enhancing oil mechanisms of N2 and CO2,the recovery mechanism of reducing oil viscosity by CO2 dissolving, reducing interfacial tension between gas and heavy oil, which are different from the steam, are described respectively. Based on this, a numerical simulation model with a single horizontal well is built to carry out the quantitative and comparative study of heated area of formation. Results show that the development effect of N2 and CO2 assisted CSS is better than that of conventional steam stimulation in porous media. Next, the different well performance of the N2 and CO2 assisted CSS and conventional CSS are compared by numerical results. Finally, on the basis of the field data of two different heavy oil field, two typical wells of CSS and N2 and CO2 assisted CSS are analyzed in detail. Consequently, the N2 and CO2 injection together with steam is helpful to improve development effect in CSS process.


Keywords


Heavy oil; Cycle steam stimulation; Heating mechanism; Enhancing oil mechanisms; Well performance

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References


[1] Liu, D., Zhang, Y. C., Li, Y, P., Zhang, L., Hou, D. M., Li, J. M., & Liu, Y. C. (2014, May). Multi-thermal fluids stimulation production characteristics: A case study of the first thermal recovery pilot test for offshore heavy oil in China. Paper presented at 2014 World Heavy Oil Congress, WHOC2014-186, New Orleans, USA.

[2] Liu, D., Ma, K. Q., Zhang, L., Nie, L. L., & Li, J. M. (2015). The research and first application of multi-thermal fluids huff and puff technology in Bohai bay offshore heavy oil in China. Paper presented at 2015 World Heavy Oil Congress, WHOC2015-153, Edmonton, Alberta, Canada.

[3] Patzek, T. W., & Koinis, M. T. (1990). Kern river steam-foam pilots. J. Pet. Technol., (4), 496-503.

[4] Yang, C. Z., & Han, D. K. (1991). Present status of EOR in the Chinese petroleum industry and its future. J. Pet. Sci. Eng., (6), 175-189.

[5] Fatemi, S. M., & Jamaloei, B. Y. (2011). Preliminary considerations on the application of toe-to-heel steam flooding (THSF): Injection well-producer well configurations. Chem. Eng. Res. Des., 89, 2365-2379.

[6] Pang, Zhanxi, Liu, Huiqing, & Zhu, L. (2015). A laboratory study of enhancing heavy oil recovery with steam flooding by adding nitrogen foams. J. Pet. Sci. Eng., 128, 184-193.

[7] Liu, H. Q., Fan, Y. P., & Zhao, D. W. (2000). Principles and methods of thermal oil recovery technology (pp.138-141). Dongying: China University of Petroleum Press.

[8] Boberg, T. C., & Lantz, R. B. (1966). Calculation of the production rate of a thermally stimulated well. J. Petrol. Technol., 1613-1623.

[9] Liu, C. Z., Cheng, L. S., Liu, Y., & Pang, Z. X. (2008). Calculating models for heating radius of cyclic steam stimulation and formation parameters in horizontal well after soaking. Acta Petrolei Sinica, 29(1), 101-105.

[10] Gu, H., Cheng, L. S., Huang, S. J., Li, B. K., & Shen, F. (2015). Steam injection for heavy oil recovery: Modelling of wellbore heat efficiency and analysis of steam injection performance. Energy Conversion and Management, 97, 166-177.

[11] Li, F., Zhang, F. S., & Ding, J. M. (2001). Application of assistant chemical viscosity reducing technology in steam soaking in shallow layer viscous oil reservoir in Xinjiang. Oil Drilling & Production Technology, 23(1), 67-68.

[12] Huang, Y. H., Liu, D., & Luo, Y. K. (2013). Research on multiple thermal fluid stimulation for offshore heavy oil production. Special Oil & Gas Reservoirs, 20(2), 164-165.

[13] Van Lookeren. J. (1983). Calculation methods for linear and radial steam flow in oil reservoirs. Society of Petroleum Engineers Journal, 23(3), 427-439.

[14] Zhang, F. Y., Xu, W. K., & Liu, X. H. (2015). Study of mechanisms of enhanced oil recovery by multi-thermal fluids. Advances in Petroleum Exploration and Development, 9(1), 1-8.

[15] Wang, S. T., Li, Y. P., & Ma, K. Q. (2015, August). Evaluation of the first cyclic steam pilot in offshore oilfield of China. Paper presented at SPE Asia Pacific Enhanced Oil Recovery Conference, Kuala Lumpur, Malaysia.




DOI: http://dx.doi.org/10.3968/8582

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