The main goal of all reservoir simulators is to predict the flow performance and oil recovery factor. Most commercial simulators solve the equations governing reservoir behavior with the finite difference approach. To solve the three-dimensional equations of flow in a p More
The main goal of all reservoir simulators is to predict the flow performance and oil recovery factor. Most commercial simulators solve the equations governing reservoir behavior with the finite difference approach. To solve the three-dimensional equations of flow in a porous media with the finite difference method, the grid dimension has an effect on the simulation results (i.e., divergence). In addition, the simulation of complex reservoirs with a large number of network blocks needs a long computational time. In order to eliminate the effect of block size and increase the speed of simulation, the streamline method has been proposed, which is widely used in the management of hydrocarbon reservoirs. The streamline method can monitor the flow direction in the reservoir, injection efficiency, pore volume, and well allocation coefficient to determine the volume of fluid transferred between injection and production wells. Also, in recent years, many studies have been conducted on the effect of nanofluid injection on the characteristics of oil reservoirs and the increase in oil recovery. Since the streamline method has not been used to simulate the nanofluid injection in oil reservoirs, in this research the effect of water-silica nanofluid injection on the flow equations of phases has been investigated. The simulation results showed that nanofluid injection into the reservoir is more effective than pure water injection and increases oil production. Moreover, it was observed that the reservoir oil type (light and heavy) has an insignificant effect on the simulation results.
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Today's the mostly of oil reservoirs specially Iranian south-west oil reservoirs due to production from these reservoirs are at their second half of life. Water or gas injection at secondary enhanced oil recovery (EOR) in order to stabilize or reduction of pressure depl More
Today's the mostly of oil reservoirs specially Iranian south-west oil reservoirs due to production from these reservoirs are at their second half of life. Water or gas injection at secondary enhanced oil recovery (EOR) in order to stabilize or reduction of pressure depletion it will no longer be responsible for reducing production. Therefore, tertiary EOR methods are used to prevent the loss of production. One of the tertiary EOR methods is using chemical injections. Injection of chemicals into oil reservoirs is used to increase the viscosity of the injected fluid, to reduce the interfacial tension between the injected fluid and the fluid produced, as well as to change the wettability of the reservoir rock. One of these chemicals, which is mainly used in relatively high permeability reservoirs, is polymers that are used to increase the viscosity of the injected fluid and also increase the mobility ratio of the reservoir fluids. This leads to the relatively piston sweeping of the produced fluid in the reservoir and also the postponement of the moment to reach the breakthrough time. One of the main challenges in the injection of polymers into oil reservoirs is the absorption of these polymers on the reservoir rock, which in addition to reducing the polymer's effectiveness in the entire injection region, also increases the cost of injection. Therefore, in this study, the effect of nanoparticles in order to reduce the adsorption of polymers on the reservoir and therefore the less polymer needed to achieve a specific production in the reservoir and, consequently, to reduce the environmental damage in order to produce polymers and also to inject them into oil reservoirs have been dealt with. The results show a decrease in polymer adsorption by the nanoparticles studied.
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In this paper, the proper modeling of the wettability modification mechanism in the process of water injection with low salinity was investigated using the eclyps simulator. Most reservoirs are in their late stages of production, and still a high percentage of oil is av More
In this paper, the proper modeling of the wettability modification mechanism in the process of water injection with low salinity was investigated using the eclyps simulator. Most reservoirs are in their late stages of production, and still a high percentage of oil is available in reservoirs; hence the need to find a way to increase oil production from these reservoirs is more and more felt. Hence, the methods of harvesting should be used. One of the ways of treating withdrawal can be low intake of water with salinity. In this project, the method of water injection with low salinity is investigated with the aim of increasing the recycling of oil. To achieve this goal, the Ellips simulator is used. The heavy oil fluid model is modeled for oil reservoir; then water injection is simulated with different salinity (low salinity). Salines are considered to be high salinity with a concentration of 45000 PPM and low salinity, with concentrations of 24000 PPM, 8000, respectively. Water injection with different salinity increases the recovery rate of oil. The results show that water injection with salinity of PPM is 8000, with an oil recovery rate of 38% to 50%.
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Water injection is one of the EOR methods which has shown great potential in recent years. The water flooding process is more effective when the injected water is enriched by chemicals which improves the oil recovery by reducing interfacial tension )IFT( and alternating More
Water injection is one of the EOR methods which has shown great potential in recent years. The water flooding process is more effective when the injected water is enriched by chemicals which improves the oil recovery by reducing interfacial tension )IFT( and alternating wettability. In this work four long alkyl chain imidazolium based ionic liquids )ILs( including Octyl, Decyl, Dodecyl, and Tetradecyl methylimidazolium Chloride were synthesized and characterized by 1HNMR and elemental analysis. Furthermore, some physicochemical properties were investigated for studied ILs as a function of temperature. The synthesized ILs were examined as additives in injected water to reduce the IFT in water flooding process. The critical micelle concentration )CMC( point and IFT of enriched sea water by ILs/crude oil were measured as a function of ILs concentration. The results show that ILs can be good candidates for EOR technology due to their significant behavior in IFT reduction and their low consumption. According to obtained results, as the alkyl chain was longer, the CMC point and IFT values were lower. ]C14mim]]Cl] was the most effective ILs which 50 ppm of this ILs, reduced the IFT values to 0.65 mN.m-1.
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