Application of fluorescent melamine resin microspheres for use as a geothermal tracer

Download
2018
Salar, Mustafa
Tracer testing of flow between injection and production wells is an effective tool to map fluid flow pathways in a geothermal reservoir. Tracer concentration curves can be used to provide insight into projected thermal drawdown in the reservoir or thermal breakthrough of re-injected fluids, estimating inter-well volumes and flow geometries. Although radioactive tracers have been used in the past, many tracer tests now use chemical tracers that are less hazardous to handle. Fluorescent organic compounds such as fluorescein and rhodamine-B, other fluorescent compounds such as naphthalene sulfonates and dissolved inorganic solutes such as potassium iodide (KI) and potassium bromide can be used as geothermal tracers. Nano-micro colloids have been suggested as ‘smart’ geothermal tracers because of controlling parameters such as particle size. Tracer experiments were conducted using micro melamine resin rhodamine B particles with differing sizes ranging from 4 µm to 10 µm and conventional rhodamine B in a 2-D cross sectional model built from marble blocks that represents a low enthalpy liquid dominated geothermal reservoir. It has been observed that first arrival time of micro tracers was 4 times earlier than those observed in conventional rhodamine B tracer. The effect of injection rate, particle size and fracture geometry on recovery of micro particles was also investigated. It was found that the recovery of the micro particles increased with increasing flow rate and the particle size has the inverse relation with particle recovery.

Suggestions

Application of fluorescent micro particles as geothermal tracers
Aydın, Hakkın; Akın, Serhat; Salar, Mustafa (null; 2018-02-14)
Tracer testing of flow between injection and production wells is an effective tool to map fluid flow pathways in a geothermal reservoir. Tracer concentration curves can be used to provide insight into projected thermal drawdown in the reservoir or thermal breakthrough of re-injected fluids, estimating inter-well volumes and flow geometries. Although radioactive tracers have been used in the past many tracer tests now use chemical tracers that are less hazardous to handle. Fluorescent organic compounds such ...
Simulation of environmental impact of an existing natural gas dehydration plant using a combination of thermodynamic models
Torkmahalleh, Mehdi Amouei; Magazova, Galiya; Magazova, Aliya; Rad, Seyed Jamal Hassani (2016-11-01)
A new approach was presented to improve the simulation results of an existing TEG based natural gas dehydration plant, using Aspen Plus software. Furthermore, the environmental impact of the plant was investigated. The plant consists of four main unit operations including an absorber, a flash tank, a stripper and a regenerator. Twelve thermodynamic models were assigned to these units. In the first step of the study, only one thermodynamic model was assigned to all of the units while in other steps, combinat...
Application of artificial neural networks to predict the downhole inclination in directionally drilled geothermal wells
Burak, Tunç; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2018)
Drilling directionally through naturally fractured geothermal reservoirs is a challenging task due to unexpected changes in inclination and azimuth of the well axis, which causes inefficient weight on bit transfer, decrease in penetration rate, increasing the risk of stuck pipe and problems in while running casings. To predict the sudden changes in inclination while drilling, a back propagation, feed forwarded multi layered artificial neural network (ANN) model, which uses drilling data collected from 12 J-...
Assessment of low temperature geothermal resources
Arkan, Serkan; Parlaktuna, Mahmut; Department of Petroleum and Natural Gas Engineering (2003)
One of the most applicable methods of low-temperature geothermal resource assessment is volumetric method. While applying volumetric method, the values of uncertain parameters should be determined. An add-in software program to Microsoft EXCEL, @RISK, is used as a tool to define the uncertainties of the parameters in volumetric equation. In this study, Monte Carlo simulation technique is used as the probabilistic approach for the assessment of lowtemperature Balçova-Narlidere geothermal field. Although Balç...
Uncertainty quantification by using stochastic approach in pore volume calculation for geothermal reservoir
Gürel, Emrah; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2015)
This study will present the application of a stochastic approach and experimental design techniques to a geologic system in order to quantify the uncertainty of pore volume estimations for a liquid dominated high temperature geothermal reservoir. The pore volume is a key element when defining the total resource available in the field. Alasehir geothermal reservoir pore volume uncertainty has been assessed. The uncertainties being addressed include geometry (top of reservoir and base of reservoir), reservoir...
Citation Formats
M. Salar, “Application of fluorescent melamine resin microspheres for use as a geothermal tracer,” M.S. - Master of Science, Middle East Technical University, 2018.