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Series and Parallel Strategies of Combined Heating, Power and Oil Recovery for Oilfields in High Water Cut Period

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Abstract

The combination of geothermal power generation and process flow in high water cut oilfields has complementary advantages, which not only saves the high drilling cost of geo-plants, but also recovers a large amount of oil every year. In addition, petroleum-associated water at temperatures above 85 °C can also replace gathering and transportation of oil-fired boilers. The main purposes of this study are to identify the most suitable working fluid for the organic Rankine cycle subsystem and to find out the application scope of the series and parallel strategies. Therefore, taking exergetic efficiency as the objective function, a case study was conducted based on the series of strategies. Results show that the exergetic efficiency is an effective indicator for the working fluid selection, and R601a shows the highest exergetic efficiency for both strategies. Furthermore, the preheater significantly improves the exergetic efficiency and enlarges the applicable scope of the series strategy. Generally speaking, the combined heating, power generating and oil recovery system has many technical and economic advantages and can be utilized in engineering applications.

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Acknowledgements

The authors gratefully acknowledge the support provided by the National Key Research and Development Program of China (Grant No. 2018YFB1501805), the Opening Funds of State Key Laboratory of Building Safety and Built Environment And National Engineering Research Center of Building Technology (Grant No. BSBE2018-06) and the Natural Science Foundation of Hebei Province (Grant No. E2015202063).

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Correspondence to Tailu Li.

Appendix: Abbreviations

Appendix: Abbreviations

CHPOR:

Combined heating, power, and oil recovery

EOS:

Equation of state

GWP:

Global warming potential

ODP:

Ozone depletion potential

OGT:

Oil gathering and transportation

ORC:

Organic Rankine cycle

SRC:

Supercritical Rankine cycle

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Liu, J., Li, T., Meng, N. et al. Series and Parallel Strategies of Combined Heating, Power and Oil Recovery for Oilfields in High Water Cut Period. Math Geosci 52, 565–592 (2020). https://doi.org/10.1007/s11004-019-09805-9

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  • DOI: https://doi.org/10.1007/s11004-019-09805-9

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