Review Article
Recent Advance of Microbial Enhanced Oil Recovery (MEOR) in China
Table 8
Ansai MFR pilot in Changqing Oilfield [
31,
67,
68].
| | Area of block (km2) | NA |
| | OOIP (tons) | NA | | Reservoir depth (m) | 1220-1241 | | Reservoir thickness (m) | 15.8 | | Reservoir temperature (°C) | 45 | | Injectors/producers | 1/6 | | Formation brine salinity (ppm) | 92600 | | Formation brine divalent (ppm) | NA | | Average permeability (mD) | 5.22 | | Average porosity (%) | 14 | | Dead oil viscosity (cP) | 10.5 at 20°C | | Oil saturation (%) | 60 | | Water cut before test (%) | 67.1 | | Implementation time | June 28-August 21, 2009 | | Injection slug (PV) | 0.003 | | Microbe concentration | 3% | | Effective well ratio | 67 | | EOR (% OOIP) | NA | | Water cut reduction (%) | 8.5 | | Input-output ratio | 1 : 5.9 | | Effective duration time | 1 year | | Expansion test | Yes |
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