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Capturing and storing carbon dioxide (CO2) underground for thousands of years is
one way to reduce atmospheric greenhouse gases, often associated with global
warming. Leakage of CO2 through wells is one of the major concerns when storing
CO2 in depleted oil and gas reservoirs. CO2-injection candidates could be new wells,
or old wells that are activ...
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Dissolution of supercritical CO2 in deep saline aquifer is one of the large-scale CO2 storage methods to mitigate the global warming. Lighter CO2 is injected at supercritical conditions in heavier water/brine saturated reservoir at depth more than 800 m. We considered that CO2 was injected at slightly above the reservoir pressure. The computational...
Citations
... Nanoscale materials possess bigger surface area in comparison with the bulk of material manufactured in a bigger scale, which makes them chemically reactive as well as having electrical characteristics and strength [4]. The cement utilized in the wells of oil is classified as the class (G) cement, which is different from the Portland cement by a low amount of "celite" (C3A) and has larger grains than the Portland cement [5]. Generally, slurries of Oil Well Cement, OWC, are higher intricate compared to traditional cement. ...
... Generally, slurries of Oil Well Cement, OWC, are higher intricate compared to traditional cement. For OWC optimization (against broad range of temperature and pressure), some additives are used based on mixture combination employed such as different mineral mixtures and chemicals [5]. Cementing is the method of adding slurry of cement to the specified place in the annular between the wellbore and the casings for bonding the formation and casing, to preserve creating the formations, to avoid the migration of the formed fluid within the regions to control lost circulation. ...
A proper slurry design is critical to cementing work success. In the present investigation, a ball mill method was utilized for preparing a nano powder from a cement dust material, supplied via Al-Kufa Cement Factory, to reinforce the oil well cement by utilizing it as a partial replacement of oil well cement class (G) using different weight percentages (0.25%, 0.5%, 0.75% and 1%). A mixture having water to cement ratio of (0.44) was produced. The produced samples characterizations were achieved via the Atomic Force Microscope (AFM), the X-Ray Diffraction (XRD) as well as the density and compressive strength. Results showed that the structural characteristics were enhanced with the phase formation of the calcium silicate hydration (C-S-H), and both density and compressive strength were improved. Accordingly, obtained results suggest that the modified cement is suitable for the oil well uses.
... The number of studies on nanotechnology related to the number of studies on nanotechnology related to the petroleum industry has been growing rapidly in the past few years. In the petroleum industry, The utilized cement in the oil wells is classified as class G cement, which is different from Portland cement by a low amount of "celite" (C3A) and has larger grains than usual Portland cements [10]. In general, slurries of oil well cement, OWC, are higher intricate than the paste of traditional cement. ...
... In general, slurries of oil well cement, OWC, are higher intricate than the paste of traditional cement. In order to strive with the lower hole states (a broad range of temperature and pressure), certain additives are normally utilized in the slurries of (OWC) that experience various properties relying upon the admixture combination employed incorporating different mineral admixtures and chemical utilized [10]. The job of cementing is the method of locating the slurry of cement to the demanded place in the annular between the well bore and the casings with usual duty for bonding the formation and casing, to preserve creating the formations, to avoid the formed fluids migration among the regions and to govern the lost circulation. ...
In this Research, a ball mill procedure was used to prepare a nanopowder from a cement dust material supplied by Cement Factory for reinforcing the oil well cement through using it as a partial replacement of oil well cement class G by a weight percentage of (0.25 to 1%) and nanorod ZnO with the same percentages. The mix with a water to cement ratio was kept at 0.44. Characterizations of the structured prepared samples were done, density and compressive strength and free water. Experimental outcomes display that the generated nanopowder have a particle size of (100 nm) and that the structural properties improved significantly with the development phase of calcium silicate hydration C-S-H. Density and compressive strength significantly improved with lower free water. That makes it proper as smart cement for the oil well applications.
