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In order to increase the oil recovery factor from depleted sandstone reservoirs with low degree of pressure, implementation of chemical flooding is the technically known as a feasible solution. The polymer-surfactant flooding, as one of the main subsets of chemical flooding methods, is a vigorous Enhanced Oil Recovery (EOR) method which can be applied with a high level of performance in sandstone...
The purpose of this experimental study is to evaluate the efficiency and performance of cyclic CO2 injection on recovery of heavy oil from a matrix-fracture system and to study the feasibility of carbon storage in a fractured medium. In this study; different laboratory experiments on one of the Iranian heavy oil and brine reservoir samples were performed. The Minimum Miscibility Pressure (MMP) between...
Improving the recovery factor of conventional oil reservoirs is not a far-fetched target when injecting miscible gases is discussed in technical Enhanced Oil Recovery (EOR) plan. Considering the leading role that Minimum Miscible Pressure (MMP) factor plays in the scenario of a miscible gas injection, and the significant impact that it does have on the sweep efficiency of the injected gas is inevitable...
Scale deposits impair production reservoirs and foul down hole, surface, and injection equipment. The effects can be rapid and dramatic. One of the most frequent scale-forming compounds in water is calcium carbonate. In a reservoir the production of brine can result in the lowering of the pressure and/or temperature. A pressure drop will decrease the solubility of CaCO3 and thus increase the saturation...
To handle successfully the augmentation of energy consumption in the four corners of the world, there is an urgent need to produce more oil. Stagnant oil production and recovery unknowingly have made more risky by conventional methods. Therefore, Enhanced Oil Recovery (EOR) methods for producing more oil from the addressed oil reservoirs are being paid attention. Keep in mind that, after primary and...
Magnetic nanoparticles are exceptional adsorbent materials due to their unique magnetic properties and good adsorption capacity. In this study, a new method combining nanoparticle adsorption and magnetic separation was investigated for the removal of cadmium ions from the drilling fluid and its efficiency was studied. Magnetic iron oxide nanoparticles were successfully synthesized, characterized and...
The adsorption of surfactants on reservoir rock has been known from early studies on surfactant flooding for this purpose, Adsorption mechanism of new nonionic surfactant on carbonate rock surface is not yet reported in the literature. This paper describes adsorption of a new nonionic surfactant which extracts from Zizyphus spina christi onto porous real carbonate reservoir rock has been studied by...
Asphaltene precipitation affects enhanced oil recovery processes through the mechanism of wettability alteration and blockage. Asphaltene precipitation is very sensitive to the reservoir conditions and fluid properties, such as pressure, temperature and injected fluid molecular weight. In this work, the model based on a feed-forward artificial neural network (ANN) optimized by particle swarm optimization...
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