Optimization of CO₂ EOR and storage design under uncertainity

Bender, Serdar
The combination of CO₂ enhanced oil recovery (EOR) and permanent CO₂ storage in mature oil reservoirs have the potential to provide a critical near-term solution for reducing greenhouse gas emissions. In the literature, although there are many studies about CO₂ storage and EOR, only a few studies have focused on maximizing both the oil recovery and the CO₂ storage. Moreover, these studies are either experimental or conducted using synthetic reservoir models. Typically, pure CO₂ has the property of mixing with oil to swell it, make it lighter, detach it from the rock surfaces, and cause the oil to flow more freely within the reservoir to producer wells. The main aim of this research is to investigate the effects of immiscible CO₂ injection while maximizing CO₂ storage in a mature heavy oil carbonate reservoir located in south east Turkey. Three different nearby natural gas reservoirs with differing amounts of CO₂ (77.17%, 28.15% and 20.65%) and flue gas originating from a cement factory were considered as CO₂ sources. In order to realistically simulate several possible mechanisms such as CO₂ swelling and viscosity reduction a 3D compositional simulation model was built after a detailed fluid characterization study. Effect of injected gas composition, gas oil ratios and injection rates on CO₂ storage and oil recovery were investigated. Impact of these parameters on the project feasibility was studied using an economic model. The highest amount of CO₂ storage (1.63 billion sm3) and cumulative oil production (1.57 MMsm3) was achieved by pure CO₂ injection. As the amount of CO₂ present in the injected gas stream decreased, the oil recovery and the stored CO₂ decreased as well. It has been observed that optimized GOR values and injection rates contributed to better sweep efficiency, pressure management and higher net present values. 


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 ...
Random walk particle modelling of polymer injection using matlab reservoir simulation toolbox
Mamak, Gökhan; Durgut, İsmail; Department of Petroleum and Natural Gas Engineering (2017)
Enhanced oil recovery (EOR) is essential to increase the maximum recoverable oil by natural means of production. Having chosen an EOR method, the effectiveness of the method should be analyzed before applying to a reservoir since the methods are generally costly. Polymer injection is a chemical EOR process, where the injected polymer with water increases the water viscosity, and help increasing the sweep efficiency in the reservoir. In order to model the effects of polymer injection, the random-walk particl...
Smart water displacement an alternative enhanced oil recovery technique
Polat, Can; Parlaktuna, Mahmut; Saner, Salih; Department of Petroleum and Natural Gas Engineering (2015)
The aim of this study is to investigate the effect of smart water displacement on oil recovery. The brine samples were prepared considering the characteristics of the samples proved to be effective in oil recovery. The effect of these brine samples on rock wettability was observed using Modified Flotation Test (MFT) procedure. The effect of changing brine salinity on interfacial tension between brine and oil samples was observed using interfacial tension meter and ring tensiometer. Liquids used in spontaneo...
An Experimental study on steam distillation of heavy oils during thermal recovery
Tavakkoli Osgouel, Yashar; Parlaktuna, Mahmut; Department of Petroleum and Natural Gas Engineering (2013)
Thermal recovery methods are frequently used to enhance the production of heavy crude oils. Steam-based processes are the most economically popular and effective methods for heavy oil recovery for several decades. In general, there are various mechanisms over steam injection to enhance and have additional oil recovery. However, among these mechanisms, steam distillation plays pivotal role in the recovery of crude oil during thermal recovery process. In this study, an experimental investigation was carried o...
Effects of CO₂ saturation on the recovery of the heavy oil using steam injection EOR technique
Farid, Guluzade; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2014)
Enhanced Oil Recovery processes include all methods that use external sources of energy and/or materials to recover oil that cannot be produced economically by conventional means. EOR processes can be classified as: thermal methods (in-situ combustion, cyclic steam injection, steam flooding), chemical methods (alkaline, polymer, foam, or surfactant/polymer injection), and miscible methods (CO2, nitrogen, hydrocarbon, or flue gas injection). Steam flooding involves continuous injection of steam to displace o...
Citation Formats
S. Bender, “Optimization of CO₂ EOR and storage design under uncertainity,” Ph.D. - Doctoral Program, Middle East Technical University, 2016.