Development of a screening model for the cyclic steam injection (CSI) process

Yalgın, Gamze
Cyclic steam injection (CSI), a single-well enhanced oil recovery method for heavy oil reservoirs, is characterized with three stages: injection, soaking, and production which altogether constitute a cycle. In this study, it is aimed to develop a screening model that can be used to accept or reject a given CSI proposal from a representative performance indicator. This indicator is estimated from a large set of reservoir & CSI design characteristics, using the screening model developed. The model has been trained by using an artificial neural network (ANN) that can estimate the process performance in a given reservoir depending on the steam-injection design parameters. The data that be used for the ANN is generated using a representative numerical reservoir model, built with a commercial simulator. A large number of simulation cases are generated using the experimental design methodology to account for a large variety of scenarios, and corresponding performance indicators such as incremental oil recovery, and injection efficiency, are collected. After proper training and validation, the screening tool is ready to estimate the performance within a fraction of a second. Sensitivity study between the tool and numerical model showed that the tool captured the problem very well. According to the 90% of testing dataset results, the tool is able to estimate efficiencies with having less than 0.2 STB/STB absolute difference error. A probabilistic assessment study for a given reservoir illustrated the practicality of the tool.


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 ...
Development of a screening tool to assess the feasibility of solar-to-steam application for the purpose of enhanced oil recovery
Abukubu, Alfred Ejiro; Artun, Emre; Sustainable Environment and Energy Systems (2020-9)
Enhanced oil recovery (EOR) involves the implementation of various techniques for increasing oil recovery, which typically involves injection of an agent that help to increase the oil flow. Steam injection is a common method to increase the recovery from heavy-oil reservoirs, which contain oil that has very high viscosity that may not be produced at economic rates due to inability to flow by viscous forces. Using concentrating solar power (CSP) as a renewable-energy system is one means to attain this object...
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...
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...
Citation Formats
G. Yalgın, “Development of a screening model for the cyclic steam injection (CSI) process,” M.S. - Master of Science, Middle East Technical University, 2017.