Optimal conditions for immiscible recycle gas injection process: A simulation study for one of the Iranian oil reservoirs

Mohammadi, S ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.scient.2011.10.003
  3. Publisher: 2011
  4. Abstract:
  5. Immiscible gas injection is one of the most common enhanced oil recovery methods used under various reservoir conditions. In this work, the immiscible recycle gas injection, as an EOR scenario for improving recovery efficiency in one of the south-west Iranian oil reservoirs, is simulated by a commercial simulator, ECLIPSE. The reservoir fluid is light oil, with an API of 43. The oil bearing formations are carbonate, and so a dual porosity/dual permeability behavior was chosen for better representation of the fracture system. Different sensitivity analyses with respect to several parameters like the number and location of injection/production wells, production/injection rate, completion interval etc., are performed. It has been observed that in conjunction with the number of wells, 1 injection/2 production well pattern was the most efficient case. Also, the well oil production rate of 200 SM 3Day and the well bottom-hole pressure of 75 bar provided higher oil recovery. Completion of injection wells in fracture and production wells in matrix have better oilfield efficiency in comparison to other cases. Finally, we proposed optimum conditions for the immiscible recycle gas injection in this reservoir, which maximizes oil recovery efficiency
  6. Keywords:
  7. Oil reservoirs ; Immiscible gas injection ; Oil reservoirs ; Optimum ; Sensitivity ; Simulation ; Efficiency ; Fracture ; Gases ; Oil bearing formations ; Oil fields ; Oil well completion ; Petroleum reservoir engineering ; Petroleum reservoirs ; Recovery ; Recycling ; Sensitivity analysis ; Water injection ; Wells ; Enhanced recovery ; Enhanced oil recovery ; Fluid injection ; Immiscibility ; Optimization ; Permeability ; Reservoir characterization ; Iran
  8. Source: Scientia Iranica ; Volume 18, Issue 6 , 2011 , Pages 1407-1414 ; 10263098 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S102630981100232X