Research Article

Advantageous Reservoir Characterization Technology in Extra Low Permeability Oil Reservoirs

Table 2

Oil and water phase-permeability test data of three types of reservoirs.

Reservoir type Bound water saturation (%) Remaining oil saturation (%) Width of common percolation area (%) Common percolation point water saturation (%) Flooding efficiency (%)

Type IV reservoir52.27%25.36%26.36%58.49%50.97%
52.46%22.67%29.03%54.77%56.15%
Average52.37%24.02%27.70%56.63%53.56%

Type III reservoir48.28%19.34%28.39%65.55%59.48%
48.30%16.12%31.42%59.70%66.10%
Average48.29%17.73%29.91%62.63%62.79%

Type II reservoir47.74%18.17%34.09%63.92%65.24%
48.04%15.99%35.97%64.51%69.23%
Average47.89%17.08%35.03%64.22%67.24%