Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2021, Vol. 43 ›› Issue (3): 101-110.DOI: 10.11885/j.issn.16745086.2020.04.07.01

• OIL AND GAS ENGINEERING • Previous Articles     Next Articles

A Comprehensive Review of Enhanced Oil Recovery Technologies for Shale Oil

LI Yibo1, HE Tianshuang1, HU Zhiming2, LI Yalong2, PU Wanfen1   

  1. 1. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Langfang Branch, PetroChina Research Insittute of Petroleum Exploration&Development, Langfang, Hebei 065007, China
  • Received:2020-04-07 Published:2021-06-22

Abstract: Through the investigation of the indoor research and field application of EOR technologies in shale oil reservoirs at home and abroad in the past 20 years, the difficulties in the development process are summarized in combination with the characteristics of shale oil reservoirs, and the adaptability of various EOR mechanisms to shale oil reservoirs. The results show:The gas injection is the best way to supply energy for shale reservoir. Carbon dioxide and natural gas are the normal injection media and the displacement mechanism needs further investigation. The wettability alteration to enhance the performance of imbibition effect is the main mechanism for surfactant and low salinity water flooding. Foam has the good performance in adjusting the heterogeneity but its stability needs to be enhanced. Thermal methods can change the thermal stress of the shale formation and thus induce the propagation of fracture to increase the sweep efficiency. In theory, solvent and nano-based material can also improve the wettability of shale reservoir, but its adaptation needs further discussion.

Key words: shale reservoir, enhanced oil recovery, unconventional resource, mechanism investigation, review

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