Geothermal systems as natural analogues for geological storage of CO2: implications for trapping mechanisms from hydrogeochemistry of western Anatolian fluids (Turkey).

Date

2017-08-13

Author

Elidemir, Sanem
Güleç, Nilgün Türkan

Metadata

Show full item record

Item Usage Stats

148
views

0
downloads

Carbon Capture and Storage (CCS) is a widely accepted strategy to reduce the unfavourable effects of CO2 emission on global warming. Natural analogues provide a valuable source for the investigation of the behaviour of CO2 at subsurface after its injection. Geothermal fields, representing deep saline aquifers, are considered as natural analogues for CO2 storage sites. This study focuses on the geothermal systems of western Anatolia (Turkey) to investigate the possible CO2-fixation mechanisms by using the published hydrogeochemical data relevant to these systems. The investigation is performed with the assistance of various geochemical approaches including speciation-solubility calculations and modelling studies (such as inverse modelling, dedolomitization modelling). The results lead to the recognition of two different groups of geothermal systems with respect to the trapping mechanisms: mineral trapping and mineral + solubility trapping. In the high-enthalpy fields of western Anatolia, mineral trapping seems to be the major mechanism, while the others show the effects of both mineral and solubility trapping; a special mechanism named dedolomitization (dolomite dissolution accompanied by calcite precipitation) is also identified as a potential mechanism for one of the geothermal fields. Being relevant to CO2 storage in deep saline aquifers, the conclusions from this study point to the importance of temperature control on the types of trapping mechanisms, high temperatures promoting mineral precipitation and hence increasing the security of storage.

URI

https://hdl.handle.net/11511/72580

Conference Name

Goldschmidt 2017 Conference

Collections

Department of Geological Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Geochemical characterization of geothermal systems in Turkey as natural analogues for geological storage of Co2/ Elidemir, Sanem; Güleç, Nilgün Türkan; Department of Geological Engineering (2014) To mitigate the unfavourable effect of CO2 emission on global warming and climate change, geological storage of CO2 is currently regarded to be one of the major strategies. Deep saline formations constitute one of the alternative reservoirs for hosting the injected CO2 and the information about the behaviour of these reservoirs is provided via the studies of natural analogues. This thesis is concerned with the geothermal systems of Turkey as natural analogues for CO2 storage sites and the evaluation of thei...
Geochemical characterization of geothermal systems in western Anatolia (Turkey): implications for CO2 trapping mechanisms in prospective CO2-EGS sites Elidemir, Sanem; Güleç, Nilgün Türkan (2018-02-01) Geological storage of CO2 is currently regarded as one of the major strategies to mitigate the increasing CO2 concentrations in the atmosphere due to anthropogenic emissions from large-scale point sources. Enhanced geothermal systems (EGS) are a novel concept in which CO2 is used as a working fluid to increase energy recovery, combined with its subsurface storage. In this study, the geothermal systems of western Anatolia are considered as potential sites for EGS, and the published hydrogeochemical data rele...
Geochemical modeling of CO2-water-rock interaction in indonesian geothermal fields for a possible future carbon capture and storage project Utomo, Gagas Pambudi; Yılmaz, Koray K.; Department of Geological Engineering (2019) The rise of CO2 concentration in Earth’s atmosphere from anthropogenic emissions is the main cause of global warming and climate change. Carbon Capture and Storage (CCS) is considered as an effective method to reduce such emission. CCS can be performed in various sites including geothermal reservoirs. This study is concerned with geochemical modeling of CO2-water-rock interaction for a possible future CCS project in Indonesian geothermal fields, namely Ungaran, Baturaden, Dieng and Awibengkok. The modeling ...
Sustainability Assessments of Urban Railway Systems: Case Study Evaluations in Turkey YÜKSEL, MÜGE; Tanyer, Ali Murat; Pekeriçli, Mehmet Koray (Springer, 2019-01-01) There are ongoing efforts to control global warming via reducing CO2 emissions, which are mostly based on human activities. Through life cycle assessment (LCA) carbon footprint (CFP) calculations provide a clear picture of embodied carbon (EC). In this study, the significance of EC estimation and reduction for railway projects are explored. The main motivation is having applicable sustainability strategies for railway systems in Turkey. Since there is no certification system, range or database, these effort...
Sustainability Assessments of Urban Railway Systems: Case Study Evaluations in Turkey Yüksel, Müge; Tanyer, Ali Murat; Pekeriçli, Mehmet Koray (2019-09-12) There are ongoing efforts to control global warming via reducing CO2 emissions, which are mostly based on human activities. Through life cycle assessment (LCA) carbon footprint (CFP) calculations provide a clear picture of embodied carbon (EC). In this study, the significance of EC estimation and reduction for railway projects are explored. The main motivation is having applicable sustainability strategies for railway systems in Turkey. Since there is no certification system, range or database, these effort...

Citation Formats

S. Elidemir and N. T. Güleç, “Geothermal systems as natural analogues for geological storage of CO2: implications for trapping mechanisms from hydrogeochemistry of western Anatolian fluids (Turkey).,” presented at the Goldschmidt 2017 Conference, Paris, France, 2017, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/72580.