Abstract
Shallow extra heavy oil reservoir is mainly developed by cold production with horizontal well in Venezuela. The crude oil with high relative density, high asphaltene content, high heavy metal content, a certain degree of dissolved gas and relatively low viscosity is the unique resource in this area. At present, this kind of long horizontal section with cold production has been widely implemented, but the oil recovery is low. There are high uncertainties in characterization of injection parameters such as well spacing and injection volume. Compared with the well spacing of cold production and conventional steam huff and puff, the multi-component thermal fluid (MCTF) huff and puff has a certain range of sweeping. When the well spacing is too large, there will be areas where heat cannot reach, and it is difficult to recover the heavy oil in this area. If the well spacing is too small, the investment cost will be too large to reach the economic plan, and the gas channeling between wells may be formed prematurely due to the rapid diffusion speed of injected non-condensate gas, which affects the oil recovery. The reasonable well spacing of MCTF huff and puff is studied to ensure the oil recovery. According to the field experience and analysis, the injection volume has a significant influence on the development effect of MCTF technology. Based on the study of MCTF stimulation mechanism, numerical models of different reservoir types are established, and optimization research of injection volume of different well spacing is carried out, as to achieve economic and effective development effect.
In this paper, when the well spacing is 200 m, the development effect performs better. Taking the cumulative oil increment and cumulative oil-MCTF ratio as the objective function, the optimization result of injection strength of multi-component thermal fluid in different types of reservoirs with 200 m well spacing is 10 ton/m, 7 ton/m and 6 ton/m respectively based on the numerical simulation method.
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References
Li, X., Yin, Y., Yang, Z., et al.: Produced gas reinjection based cyclic solvent processes for foamy oil reservoirs in the eastern Orinoco Belt, Venezuela. Paper SPE 180730 presented at the SPE Canada Heavy Oil Technical Conference held in Calgary, Alberta, Canada, 7–9 June 2016
Liu, Z., Chen, C., et al.: EOR mechanism of multi-component thermal fluid stimulation in shallow extra heavy oil reservoir. Paper presented at the International Field Exploration and Development Conference in Xi’an, China, 16–18 October 2019
Nguele, R., Sasaki, K., Sugai, Y.: Gas solubility and acidity effects on heavy oil recovery at reservoir conditions. Paper SPWLA-JFES-2014-J presented at the 20th Formation Evaluation Symposium of Japan, Chiba, Japan, 1–2 October 2014
Wu, Y., Sun, Y.: Feasibility study on flue gas assisted SAGD in offshore heavy oil reservoirs. Paper SPE 174564 presented at the SPE Asia Pacific Enhanced Oil Recovery Conference, August, Kuala Lumpur, Malaysia, 11–13 August 2015
Sun, Y., Zhong, L., Hou, J.: Case study: thermal enhance bohai offshore heavy oil recovery by co-stimulation of steam and gases. Paper SPE165410 presented at the SPE Heavy Oil Conference-Canada, Calgary, Alberta, Canada, 11–13 June 2013
Li, X., Yang, D., Fan, Z.: Phase behaviour and viscosity reduction of CO2-heavy oil systems at high pressures and elevated temperatures. Paper SPE 170057 presented at the SPE Heavy Oil Conference-Canada, Alberta, Canada, 10–12 June 2014
Doan, L.T., Harschnitz, B., et al.: NCG co-injection at hangingstone demonstration project-case study and analysis. Paper SPE 170068 presented at the SPE Heavy Oil l Conference-Canada held in Calgary, Alberta, Canada, 10–12 June 2014
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The project is supported by China National Key Project Foundation (Number 2016ZX05031-001).
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Liu, Zc., Chen, Cc., Yang, Zp., Li, Xm., Shen, Y., Shi, Xx. (2022). Optimization of Multiple Component Thermal Fluid Huff and Puff Technology for Horizontal Wells in Shallow Extra Heavy Oil Reservoir. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2021. IFEDC 2021. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-2149-0_111
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DOI: https://doi.org/10.1007/978-981-19-2149-0_111
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