Evaluation of the EOR potential in hydraulically fractured shale oil reservoirs by cyclic gas injection

T. Wan, J. J. Sheng

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Gas flooding in fractured reservoirs may not be an effective avenue for improving oil recovery because the injected fluids could break-through to production wells via the fracture network. A cyclic injection scheme is one way to solve this problem. In this study, the authors propose to use cyclic gas injection to improve hydraulically fractured shale oil recovery. They used a simulation approach to evaluate the enhanced oil recovery (EOR) potential from cyclic gas injection. The simulation results indicate that total oil recovery can be increased up to 29% by cyclic gas injection, compared with the 6.5% recovery from the primary depletion. If a higher pressure is used to reach fully miscibility with reservoir oil and more cycles are employed, more oil recovery is expected.

Original languageEnglish
Pages (from-to)812-818
Number of pages7
JournalPetroleum Science and Technology
Volume33
Issue number7
DOIs
StatePublished - 2015

Keywords

  • IOR
  • Shale oil
  • cyclic gas injection

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