PENETRATION OF SULFATE REDUCERS THROUGH A POROUS NORTH-SEA-OIL RESERVOIR

The presence of mesophilic benzoate-degrading sulfate-reducing bacteri a in the water systems of three Norwegian oil platforms was investigat ed. Strain 4502 was isolated from the injection water system, and spec ific antibodies were produced against this isolate. It was present in the injection water system during a period of 3 years, but not in the in situ reservoir water. Later it was found in water samples collected from the oil field production system. This showed that strain 4502 ha d penetrated the reservoir together with the injection water and event ually reached the production well.