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DTU Olie og Gas
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ct scanning of
core
plugs contributes to more efficient oil
recovery
out in the north sea, it is not possible to examine what exactly takes place in the reservoir when the oil industry injects water and in future perhaps adds chemicals, modified water, or bacteria to increase recovery. therefore, research- ers from dhrtc have taken core plugs to the laboratory and ct-scanned the recovery process. ?e core plug is just 4 cm in diameter and 9 cm long. however, despite its size, this small cylinder of chalk from the north sea may well contain secrets that are invaluable for the oil industry. in the laboratory, researchers from dhrtc use a method that mimics the actual recovery process in the north sea, and they have improved the ct scanning of the process to follow the oil saturation inside the core sample. for this, they use bits of core plugs which are carefully chosen so their porosity and permeabil- ity are largely similar to the conditions in the most oil-saturated rock strata ? several kilometres beneath the seabed. by means of the ct scan, the re- searchers can show 3d images of what happens inside the chalk at millimetre scale when you inject water and in future perhaps chemicals, modified water, or bacteria to increase oil recov- ery. ?e idea is to test different eor (enhanced oil recovery) methods in the laboratory and to arrive at the best method. in this way, the research could contribute ? at the end of the postdoc amalia yunita halim in the laboratory. photo: joachim rode 15 dhrtc 2016
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