Enzymes for Enhanced Oil Recovery (EOR) Flow
Enzymes for Enhanced Oil Recovery Nasiri U. of Bergen 2011
Enzymes for Enhanced Oil Recovery (EOR) Hamidreza Nasiri Dissertation for the degree of Philosophiae Doctor (PhD) Centre for Integrated Petroleum Research Department of Chemistry University of Bergen
Enzymes for Enhanced Oil Recovery (EOR) Report Enzymes for Enhanced Oil Recovery (EOR) Bergen Enzymes for Enhanced Oil Recovery (EOR) Research Historia Contacto GreenZyme®
Primary oil recovery by reservoir pressure depletion and secondary oil recovery by waterflooding usually result in poor displacement efficiency. As a consequence there is always some trapped oil remaining in oil reservoirs. Oil entrapment is a result of complex interactions between viscous, gravity and capillary forces. Improving recovery from hydrocarbon fields typically involves altering the relative importance of the viscous and capillary forces. The potential of many EOR methods depends on their influence on fluid/rock interactions related to wettability and fluid/fluid interactions reflected in IFT (Green and Willhite, 1998). If the method has the potential to change the interactions favorably, it may be considered for further investigation, i.e. core flooding experiment, pilot and reservoir implementation. The effect of enzymes on interactions in the oil/brine/solid system was studied. It was found that enzymes can change the adhesion behavior of the crude oil on glass surfaces from adhesion to non-adhesion when they are added to the brine solution. This was confirmed by contact angle measurements, which showed that contact angles became more water-wet (i.e. decreased) after exposure to enzyme solutions. Possible mechanisms giving rise to these observations, including catalysis of ester hydrolysis and enzyme adsorption, were discussed and tested.
Centre for Integrated Petroleum Research CIPR Annual Report 2009
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