Improving oil production for high water cut well by diesel injection

  • Le Minh Vu Petrovietnam Exploration and Production Corporation
  • Nguyen Duc Dong Petrovietnam Exploration and Production Corporation
  • Cao Huu Binh Petrovietnam Exploration and Production Corporation
  • Vu Viet Hung Petrovietnam Exploration and Production Corporation
Keywords: Diesel injection, hysteresis, high water-cut, iimproving oil production, improving oil production

Abstract

After a long period of production, formation water breakthrough into the well not only reduces oil rate but also causes difficulties for operation. A major problem is to recover well performance in case of high water cut after shut-in period.

 In case of shutting-in high water cut production wells, water volume will be settled down near the wellbore. After re-opening, oil rate will be reduced and water cut is higher than before shutting-in. This phenomenon is caused by the effect of hysteresis that reduces oil relative permeability. Application of this hysteresis phenomenon can maintain production for high water cut wells after shut-in stage by injecting non-wetting fluid (diesel).

From phenomenal research to simulation and actual implementation at DD-3P and DD-7P wells using diesel injection method, it has been shown that the re-starting of wells after long shut in period was easy and the oil production was increased by about 20 - 40% for a certain period of time.

In this study, the authors present a specific procedure including selecting a suitable diesel pump, designing pump volume, simulating and deploying. The result of the study is highly practical not only for Thang Long - Dong Do field but also for nearby fields where high water cut problems are encountered.

References

1. D.Brant Bennion, F.Brent Thomas, A.K.M. Jamaluddin, T.Ma. The effect of the trapped critical fluid saturations on reservoir permeability and conformance. CIM ATN. June 1998.
2. Schlumberger. Eclipse user guide for hysteresis. 1998.
3. Schlumberger. Eclipse techical disciption. Hysteresis. 2014; 34: p. 410.
Published
2020-01-24
How to Cite
Minh Vu, L., Duc Dong, N., Huu Binh, C., & Viet Hung, V. (2020). Improving oil production for high water cut well by diesel injection. Petrovietnam Journal, 1, 20 - 29. https://doi.org/10.25073/petrovietnam journal.v1i0.25
Section
Articles