Rastlantısal parçacık hareket yöntemiyle incelenen dağılım katsayısının polimer enjeksiyonu üzerine etkisi

Polymer injection is a chemical EOR process, where the aim is to improve sweep efficiency of water flooding in an oil reservoir by increasing the water viscosity with the thickening effect of polymer injected with water. A random walk particle tracking model is developed to simulate the injection of polymer into an oil reservoir and it is integrated into an open source black-oil reservoir simulator (SINTEF’s MATLAB Reservoir Simulation Toolbox, MRST). The black-oil simulator solves the set of partial differential equations describing multiphase fluid flow in the porous medium, whereas the transport of the injected polymer due to advection and dispersion processes is obtained from the applied random walk method. The finite difference/finite volume discretizations of the continuity equations applied in MRST does not involve the physical dispersion processes. The dispersion observed on the results are called the numerical dispersion and are due to the numerical discretization methods applied to solve the continuity equations. Since dispersion in porous media is a scale dependent process, it is hard to quantify its coefficient by experiments or empirical equations in general. The random walk method to model the transport of injected polymer in the reservoir is independent of discretization. Hence, it does not involve numerical dispersion. Instead, the physical dispersion due to, for instance, the tortuosity of flow path or the adsorption of polymer in porous media can be included into the model. Therefore, we used the method to analyze the effect of dispersion coefficient. Increased dispersion coefficient causes the results to converge to actual MRST solution with increased uncertainties of polymer concentration. The dispersivity of a reservoir in simple one-dimensional problems can be determined with the method.
Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi


Development of a screening model for polymer flooding in multi-layer reservoirs
ZarePakzad, Negar; Durgut, İsmail; Artun, Emre; Department of Petroleum and Natural Gas Engineering (2018)
Polymer flooding is a chemical enhanced oil recovery method which aims to increase oil production from a water flooded oil reservoir by increase in water viscosity and reduction in water-oil mobility ratio. These changes result in significant increase in sweep efficiency of water comparing with water-only flooding technique. The objective of this study is to analyze the behavior of multilayer reservoirs under polymer flooding process, considering effects of reservoir characteristics, polymer properties and ...
Effects of nanoparticles on the performance of drilling fluids
Bal, Berk; Kök, Mustafa Verşan; Gücüyener, İsmail Hakkı; Department of Petroleum and Natural Gas Engineering (2017)
In this master thesis, effects of nanoparticles on the filtration and rheological properties of water-based drilling fluids are experimentally investigated. Four different silica nanoparticles are added into the lignosulfonate and bentonite based drilling fluids. By using data obtained at the end of this research, filtration and rheological properties of nanofluids are analyzed and compared with the base fluids at different temperatures. Two groups of experiments are conducted in this research. In the first...
Development of graphene oxide based aerogels
Doğan, Öznur; Bat, Erhan; Department of Chemical Engineering (2017)
Owing to their large surface area, high hydrophobicity and porous structure, graphene oxide based aerogels have been proposed as feasible and economic solutions for the increasing water pollution caused by crude oils, petroleum products and toxic organic solvents. In this study, graphene oxide based aerogels were prepared via two different routes. In the first route, random copolymers of glycidyl methacrylate and styrene were used as crosslinkers in the aerogel. In the second route, 1,3-diaminopropane was u...
A life cycle assessment of the membrane processes applied for salt recovery in reactive dyeing
Şimşek, Naz Zeynep; Yetiş, Ülkü; Department of Environmental Engineering (2022-8-26)
Reactive dyeing in the textile industry requires the addition of a significant amount of salt and generates wastewater that is high in pollution load and particularly high in salt concentration. In the literature, a variety of Best Available Techniques (BATs) for the reduction of salt consumption in reactive dyeing and the reuse of treated wastewater are available. Among these techniques, Ultrafiltration (UF), Nanofiltration (NF), and combined UF+NF systems appear as the most efficient BATs, as they can pro...
Effect of ultrasound and high hydrostatic pressure (hhp) on liquefaction and quality parameters of selected honey varieties.
Basmacı, İpek; Alpas, Hami; Department of Food Engineering (2010)
Heat treatment (around 50°C) is a major step in honey filling and packaging that is applied before filtration to decrease viscosity, reduce the moisture level, to destroy yeasts, liquefy crystals and delay crystallization. As a result, formation of Hydroxy Methyl Furfural (HMF), decrease in enzymatic activity, color deterioration, decrease in viscosity and many other structural changes are observed. HMF is produced as a result of Maillard reaction and/or hexose dehydration -which is undesirable-, practicall...
Citation Formats
İ. Durgut, “Rastlantısal parçacık hareket yöntemiyle incelenen dağılım katsayısının polimer enjeksiyonu üzerine etkisi,” Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, pp. 432–438, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89762.