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- W2767783587 abstract "Abstract To investigate the effects of carbonated water injection (CWI) on dolomite porous media, a set of two coreflooding experiments were performed on outcrop samples. The results allowed the identification of the effects of dissolution on porosity and permeability on outcrop dolomite samples. Experiments were carried out at 70 °C, injection pressures of 8500 and 7500 psi, and a constant injection flow rate of 2 cm3/min. The experimental setup was assembled and commissioned arranging two coreholders connected in series, each one containing a rock sample, to improve result acquisition. The injected fluid was carbonated water made from synthetic sea water (salinity of 38 kppm) saturated with 21.5% of total solubility in CO2 X-ray Computed Tomography (CT) provided image acquisition allowing the evaluation of porosity evolution throughout the tests. Experiments showed a tendency for porosity increase for the sample in the first coreholder, possibly associated with rock dissolution. The spatial porosity profile from the CT scan for the first coreholder showed porosity variation in the first centimeters of the rock sample inlet. In the second coreholder, porosity remained unchanged during the entire test, indicating that the dissolution effect promoted by carbonated water injection was most notable in the first sample when compared with the second. The amount of dissolved moles afforded the behavior regarding dissolution phenomena. Permeability behavior was analyzed through the pressure drop values from the sample for the entire experiment, registered by pressure transducers installed in each coreholder. Results showed consistent permeability behavior for the first coreholder samples, despite the tendency of the porosity to increase. The samples placed in the second coreholder presented lower permeability because minerals dissolved in the first sample were transported to the second sample and likely precipitated and so related to the porous media blockage." @default.
- W2767783587 created "2017-11-17" @default.
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- W2767783587 date "2017-11-13" @default.
- W2767783587 modified "2023-09-30" @default.
- W2767783587 title "Investigation of Dissolution Effects on Dolomite Porous Media under Carbonated Water Injection CWI" @default.
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- W2767783587 doi "https://doi.org/10.2118/188601-ms" @default.
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