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China’s oil security from the supply chain perspective: A review

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  • Zhao, Chunfu
  • Chen, Bin

Abstract

Oil security has become a major issue in China. This paper analyzes China’s oil security from the supply chain perspective, as the country faces challenges from an increasing reliance on imported oil, a fast-growing economy, the Malacca dilemma, and volatile international oil prices. To clarify the issue of oil security, we first review the development phase of China’s oil industry and previous research related to its energy security. Then a framework from the supply chain perspective is constructed to identify the current risk from three aspects: energy flow, financial and environmental. Finally, policies aimed at improving the country’s energy security are examined and potential problems presented. From this analysis, we conclude that the potential risk arising from China’s oil system is inherently interconnected. There is still great potential for the country to improve oil security by strengthening its strategic oil reserves, improving energy efficiency, and developing its domestic oil tanker fleet.

Suggested Citation

  • Zhao, Chunfu & Chen, Bin, 2014. "China’s oil security from the supply chain perspective: A review," Applied Energy, Elsevier, vol. 136(C), pages 269-279.
  • Handle: RePEc:eee:appene:v:136:y:2014:i:c:p:269-279
    DOI: 10.1016/j.apenergy.2014.09.016
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    as
    1. Martchamadol, Jutamanee & Kumar, S., 2013. "An aggregated energy security performance indicator," Applied Energy, Elsevier, vol. 103(C), pages 653-670.
    2. Wright, Philip, 2005. "Liberalisation and the security of gas supply in the UK," Energy Policy, Elsevier, vol. 33(17), pages 2272-2290, November.
    3. Ma, Linwei & Fu, Feng & Li, Zheng & Liu, Pei, 2012. "Oil development in China: Current status and future trends," Energy Policy, Elsevier, vol. 45(C), pages 43-53.
    4. Kiriyama, Eriko & Kajikawa, Yuya, 2014. "A multilayered analysis of energy security research and the energy supply process," Applied Energy, Elsevier, vol. 123(C), pages 415-423.
    5. Chevillon, Guillaume & Rifflart, Christine, 2009. "Physical market determinants of the price of crude oil and the market premium," Energy Economics, Elsevier, vol. 31(4), pages 537-549, July.
    6. Wagner, Stephan M. & Neshat, Nikrouz, 2010. "Assessing the vulnerability of supply chains using graph theory," International Journal of Production Economics, Elsevier, vol. 126(1), pages 121-129, July.
    7. Li, Raymond & Leung, Guy C.K., 2011. "The integration of China into the world crude oil market since 1998," Energy Policy, Elsevier, vol. 39(9), pages 5159-5166, September.
    8. Basher, Syed A. & Sadorsky, Perry, 2006. "Oil price risk and emerging stock markets," Global Finance Journal, Elsevier, vol. 17(2), pages 224-251, December.
    9. Wu, Gang & Liu, Lan-Cui & Wei, Yi-Ming, 2009. "Comparison of China's oil import risk: Results based on portfolio theory and a diversification index approach," Energy Policy, Elsevier, vol. 37(9), pages 3557-3565, September.
    10. Månsson, André & Sanches-Pereira, Alessandro & Hermann, Sebastian, 2014. "Biofuels for road transport: Analysing evolving supply chains in Sweden from an energy security perspective," Applied Energy, Elsevier, vol. 123(C), pages 349-357.
    11. Winzer, Christian, 2012. "Conceptualizing energy security," Energy Policy, Elsevier, vol. 46(C), pages 36-48.
    12. Regnier, Eva, 2007. "Oil and energy price volatility," Energy Economics, Elsevier, vol. 29(3), pages 405-427, May.
    13. McCarthy, Ryan W. & Ogden, Joan M. & Sperling, Daniel, 2007. "Assessing reliability in energy supply systems," Energy Policy, Elsevier, vol. 35(4), pages 2151-2162, April.
    14. Feng, Lianyong & Li, Junchen & Pang, Xiongqi, 2008. "China's oil reserve forecast and analysis based on peak oil models," Energy Policy, Elsevier, vol. 36(11), pages 4149-4153, November.
    15. Kruyt, Bert & van Vuuren, D.P. & de Vries, H.J.M. & Groenenberg, H., 2009. "Indicators for energy security," Energy Policy, Elsevier, vol. 37(6), pages 2166-2181, June.
    16. World Bank, 2012. "World Development Indicators 2012," World Bank Publications - Books, The World Bank Group, number 6014, December.
    17. Osmani, Atif & Zhang, Jun, 2014. "Economic and environmental optimization of a large scale sustainable dual feedstock lignocellulosic-based bioethanol supply chain in a stochastic environment," Applied Energy, Elsevier, vol. 114(C), pages 572-587.
    18. Kesicki, Fabian, 2010. "The third oil price surge - What's different this time?," Energy Policy, Elsevier, vol. 38(3), pages 1596-1606, March.
    19. Wu, Gang & Wei, Yi-Ming & Fan, Ying & Liu, Lan-Cui, 2007. "An empirical analysis of the risk of crude oil imports in China using improved portfolio approach," Energy Policy, Elsevier, vol. 35(8), pages 4190-4199, August.
    20. Zhang, Xiao-Bing & Fan, Ying & Wei, Yi-Ming, 2009. "A model based on stochastic dynamic programming for determining China's optimal strategic petroleum reserve policy," Energy Policy, Elsevier, vol. 37(11), pages 4397-4406, November.
    21. Wu, Gang & Fan, Ying & Liu, Lan-Cui & Wei, Yi-Ming, 2008. "An empirical analysis of the dynamic programming model of stockpile acquisition strategies for China's strategic petroleum reserve," Energy Policy, Elsevier, vol. 36(4), pages 1470-1478, April.
    22. Leung, Guy C.K., 2011. "China's energy security: Perception and reality," Energy Policy, Elsevier, vol. 39(3), pages 1330-1337, March.
    23. Portugal-Pereira, Joana & Esteban, Miguel, 2014. "Implications of paradigm shift in Japan’s electricity security of supply: A multi-dimensional indicator assessment," Applied Energy, Elsevier, vol. 123(C), pages 424-434.
    24. Mulhall, Rachel Ann & Bryson, John R., 2014. "Energy price risk and the sustainability of demand side supply chains," Applied Energy, Elsevier, vol. 123(C), pages 327-334.
    25. Gracceva, Francesco & Zeniewski, Peter, 2014. "A systemic approach to assessing energy security in a low-carbon EU energy system," Applied Energy, Elsevier, vol. 123(C), pages 335-348.
    26. Heffron, Raphael J. & McCauley, Darren, 2014. "Achieving sustainable supply chains through energy justice," Applied Energy, Elsevier, vol. 123(C), pages 435-437.
    27. Wang, Zhao & Jin, Yuefu & Wang, Michael & Wei, Wu, 2010. "New fuel consumption standards for Chinese passenger vehicles and their effects on reductions of oil use and CO2 emissions of the Chinese passenger vehicle fleet," Energy Policy, Elsevier, vol. 38(9), pages 5242-5250, September.
    28. Genus, Audley & Mafakheri, Fereshteh, 2014. "A neo-institutional perspective of supply chains and energy security: Bioenergy in the UK," Applied Energy, Elsevier, vol. 123(C), pages 307-315.
    29. Rendon-Sagardi, Miguel A. & Sanchez-Ramirez, Cuauhtemoc & Cortes-Robles, Guillermo & Alor-Hernandez, Giner & Cedillo-Campos, Miguel G., 2014. "Dynamic analysis of feasibility in ethanol supply chain for biofuel production in Mexico," Applied Energy, Elsevier, vol. 123(C), pages 358-367.
    30. Tang, Weiqi & Wu, Libo & Zhang, ZhongXiang, 2010. "Oil price shocks and their short- and long-term effects on the Chinese economy," Energy Economics, Elsevier, vol. 32(Supplemen), pages 3-14, September.
    31. Jian Chai & Shubin Wang & Shouyang Wang & Ju’e Guo, 2012. "Demand Forecast of Petroleum Product Consumption in the Chinese Transportation Industry," Energies, MDPI, vol. 5(3), pages 1-22, March.
    32. Yao, Lixia & Chang, Youngho, 2014. "Energy security in China: A quantitative analysis and policy implications," Energy Policy, Elsevier, vol. 67(C), pages 595-604.
    33. Walls, W.D., 2010. "Petroleum refining industry in China," Energy Policy, Elsevier, vol. 38(5), pages 2110-2115, May.
    34. Ding, Yanjun & Shen, Wei & Yang, Shuhong & Han, Weijian & Chai, Qinhu, 2013. "Car dieselization: A solution to China's energy security?," Energy Policy, Elsevier, vol. 62(C), pages 540-549.
    35. Leung, Guy C.K. & Cherp, Aleh & Jewell, Jessica & Wei, Yi-Ming, 2014. "Securitization of energy supply chains in China," Applied Energy, Elsevier, vol. 123(C), pages 316-326.
    36. Leung, Guy C.K., 2010. "China's oil use, 1990-2008," Energy Policy, Elsevier, vol. 38(2), pages 932-944, February.
    37. Zhang, ZhongXiang, 2011. "China's energy security, the Malacca dilemma and responses," Energy Policy, Elsevier, vol. 39(12), pages 7612-7615.
    38. von Hippel, David & Suzuki, Tatsujiro & Williams, James H. & Savage, Timothy & Hayes, Peter, 2011. "Energy security and sustainability in Northeast Asia," Energy Policy, Elsevier, vol. 39(11), pages 6719-6730.
    39. Bai, Y. & Zhou, D.Q. & Zhou, P., 2012. "Modelling and analysis of oil import tariff and stockpile policies for coping with supply disruptions," Applied Energy, Elsevier, vol. 97(C), pages 84-90.
    40. Vivoda, Vlado, 2009. "Diversification of oil import sources and energy security: A key strategy or an elusive objective?," Energy Policy, Elsevier, vol. 37(11), pages 4615-4623, November.
    41. David B. Jemison, 1987. "Risk and the Relationship Among Strategy, Organizational Processes, and Performance," Management Science, INFORMS, vol. 33(9), pages 1087-1101, September.
    42. Li, Weiqi & Fu, Feng & Ma, Linwei & Liu, Pei & Li, Zheng & Dai, Yaping, 2013. "A process-based model for estimating the well-to-tank cost of gasoline and diesel in China," Applied Energy, Elsevier, vol. 102(C), pages 718-725.
    43. Ma, Linwei & Geng, Jia & Li, Weqi & Liu, Pei & Li, Zheng, 2013. "The development of natural gas as an automotive fuel in China," Energy Policy, Elsevier, vol. 62(C), pages 531-539.
    44. Zhang, Kesong & Hu, Jingnan & Gao, Shuzheng & Liu, Yungang & Huang, Xianjiang & Bao, Xiaofeng, 2010. "Sulfur content of gasoline and diesel fuels in northern China," Energy Policy, Elsevier, vol. 38(6), pages 2934-2940, June.
    45. Gupta, Eshita, 2008. "Oil vulnerability index of oil-importing countries," Energy Policy, Elsevier, vol. 36(3), pages 1195-1211, March.
    46. ZhongXiang Zhang, 2013. "China’s Quest for Energy Security: Why Are the Stakes So High?," Review of Environment, Energy and Economics - Re3, Fondazione Eni Enrico Mattei, January.
    47. Shih-Mo Lin & Jun-Chiang Feng & Fu-Kuang Ko, 2012. "Assessing Taiwan’s energy security under climate change," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 62(1), pages 3-15, May.
    48. Liu, Haiyan & Yu, Jianning & Xu, Jian & Fan, Yu & Bao, Xiaojun, 2007. "Identification of key oil refining technologies for China National Petroleum Co. (CNPC)," Energy Policy, Elsevier, vol. 35(4), pages 2635-2647, April.
    49. Wianwiwat, Suthin & Asafu-Adjaye, John, 2013. "Is there a role for biofuels in promoting energy self sufficiency and security? A CGE analysis of biofuel policy in Thailand," Energy Policy, Elsevier, vol. 55(C), pages 543-555.
    50. Nel, Willem P. & Cooper, Christopher J., 2008. "A critical review of IEA's oil demand forecast for China," Energy Policy, Elsevier, vol. 36(3), pages 1096-1106, March.
    51. Tan, Xiaomei, 2013. "China's overseas investment in the energy/resources sector: Its scale, drivers, challenges and implications," Energy Economics, Elsevier, vol. 36(C), pages 750-758.
    52. Wu, Yanrui, 2003. "Deregulation and growth in China's energy sector: a review of recent development," Energy Policy, Elsevier, vol. 31(13), pages 1417-1425, October.
    53. Hoggett, Richard, 2014. "Technology scale and supply chains in a secure, affordable and low carbon energy transition," Applied Energy, Elsevier, vol. 123(C), pages 296-306.
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