A single-well polymer-injection and back-production test has been performed in an oil and gas field offshore Norway. The objective of the test was to verify at field conditions the properties measured in the laboratory for the biopolymer schizophyllan. The data confirm that the biopolymer is not biodegraded during the shut-in period because of efficient application of biocide injected simultaneously with the biopolymer. Rate and pressure data also support that the injectivity is maintained during the test compared with water injectivity.
Introduction
Polymer injection has been considered as a method to increase oil recovery from the Heidrun Field.
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