Abstract
Gas injection is one of the most important methods to enhance oil recovery. The rock wettability of reservoir has a great effect on gas displacement efficiency. Based on a three-dimensional pore-scale network model, the distribution and displacement efficiencies of gas injection in six reservoirs with different wettability were investigated using the pore-scale flow modeling method. The results show that gas injection efficiency in water-wet and mixed-wet small (small pores are oil-wet) reservoirs is poorer than that in oil-wet, intermediate-wet, mixed-wet large (large pores are oil-wet) and fractionally-wet (30% of pores is water-wet) systems.
| Original language | English |
|---|---|
| Pages (from-to) | 467-470 |
| Number of pages | 4 |
| Journal | Shiyou Xuebao/Acta Petrolei Sinica |
| Volume | 31 |
| Issue number | 3 |
| Publication status | Published - May 2010 |
Keywords
- Gas injection efficiency
- Gas-driven reservoir
- Residual oil distribution
- Rock wettability
- Three-dimensional pore network model