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- W2008653961 abstract "Abstract As an effective method to enhance oil recovery and to reduce green gas emission, injection of carbon dioxide (CO2) into water flooded petroleum reservoirs has obtained increasing attention. In the laboratory study of such a process, in-situ identification of different phases and determination of their saturations by use of X-ray computed tomography (CT) is the key to visualize flow and get insight into the mechanisms of the multiphase flows in porous media. Although the flooding process is essentially three-phase, and involves interaction between oil, water and CO2 (mutual solubility, change of acidity, swelling of the oil etc.), there are few studies on identifying all the three phases and measuring their saturations, especially on chalk core under high pressure and temperature conditions. The purpose of our study is to experimentally identify different phases and to quantify their saturations during CO2 flooding. Laboratory experiments on injection of CO2 into chalk cores form the Danish North Sea, saturated with the doped live oil and the doped distilled water, have been carried out under high pressure and high temperature. Dopants were used to increase the accuracy in phase saturation determination, especially the in-situ CO2 saturation under three-phase flow conditions. The experiments utilized CT imaging to visualize the displacement patterns, in-situ fluid saturations dynamically during the flooding. Different image processing software have been used to ensure the validity of image analysis. During the experiment, in-situ saturation of CO2 in the tertiary gas flooding has been determined quantitatively and the visualization of injection process was constructed dynamically. At the same time, production of various fluids was recorded dynamically during CO2 flooding, and based on those data, detailed analysis was conducted. The key factors and the preferential parameters needed for the successful application of the X-ray computed tomography to the multiphase flows in a chalk rock were also discussed." @default.
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- W2008653961 date "2010-04-24" @default.
- W2008653961 modified "2023-09-28" @default.
- W2008653961 title "In-Situ Phase Identification and Saturation Determination in Carbon Dioxide Flooding of Water Flooded Chalk Using X-Ray Computed Tomography" @default.
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- W2008653961 doi "https://doi.org/10.2118/129760-ms" @default.
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