Optional reservoir | Main parameter index of oil reservoir | Reservoir auxiliary index | Remarks (selecting in-situ combustion) | |
---|---|---|---|---|
Preferred reservoir | Reservoir type: Dip reservoir; Edge water reservoir; Thin Layer reservoir Reservoir development history: Nonproducing time; Natural producing time |
Porosity≥0.18 Initial oil saturation≥0.35 3m< effective net sand <20 m Formation temperature degassed oil Viscosity≤8000 mPa·s |
Net aggregate thickness ratio >0.5 Permeability >100×10-3μm2 |
Largest feasibility |
Second reservoir | Reservoir type: Underscreen and bottom water reservoir; Edge and bottom water reservoir Reservoir development history: After steam stimulation; After water flooding |
Porosity≥0.22 Initial oil saturation≥0.43 Effective net sand≥3 m Formation temperature degassed oil Viscosity≤5000 mPa·s |
Net aggregate thickness ratio >0.6 Permeability > 200×10-3μm2 |
Line well network should be taken |
Layered medium thickness oil reservoir; Massive oil pool |
Porosity≥0.20 Initial oil saturation≥0.38 Effective net sand≥3 m Formation temperature degassed oil Viscosity≤7000 mPa·s |
Net aggregate thickness ratio >0.5 Permeability > 150×10-3μm2 |
Horizontal well technology to in-situ com bustionfield test must be conducted |