Abstract
CO2 storage in geological formations is one of the leading solutions for mitigation greenhouse gas emissions. Types of geological formations that can be used for CO2 storage, that are discussed in this paper are: depleted oil and gas reservoirs, saline aquifers and injection CO2 in partially depleted oil reservoirs for enhanced oil recovery (ЕОР–CO2 method). In order to select the most suitable geological storage of CO2, the ranking of these storage options was performed using two models of multi criteria analysis, PROMETHEE and VIKOR. In this paper are presented an overview of considered criteria (storage capacity, total storage costs, risk assessment costs, storage time dynamics, risk of CO2 leakage from geological formation and risk of CO2 leakage through the well), description of applied multi criteria analysis methods, selection of optimal CO2 storage option and results of their application.
Highlights
The concentrations of CO2 in the atmosphere that are the main cause of global warming and climate change are constantly increasing, resulting from the combustion of fossil fuels during the process of electricity generation, certain industrial processes and transport
Ranking of the geological formation is based on the following criteria: storage capacity, total storage costs, risk assessment costs, storage time dynamics, risk of CO2 leakage from geological formation and risk of CO2 leakage through the well
The selection of the optimal geological formation is based on the following criteria: storage capacity, total storage costs, risk assessment costs, storage time dynamics, risk of CO2 leakage from geological formation and risk of CO2 leakage through the well
Summary
The concentrations of CO2 in the atmosphere that are the main cause of global warming and climate change are constantly increasing, resulting from the combustion of fossil fuels during the process of electricity generation, certain industrial processes and transport. It is considered that one of the leading solutions for mitigation of CO2 emissions is geological storage of CO2, which includes three phases: capturing anthropogenic CO2, transporting and injection into different types of geological formations such as: depleted oil and gas reservoirs, saline aquifers, unmined coal beds, injection CO2 in partially depleted oil reservoirs for enhanced oil recovery (EOR–CO2 method), as well as storage in salt caverns, basalt formations and oil or gas rich shale. Depleted oil and gas reservoirs, saline aquifers and injection CO2 in partially depleted oil reservoirs for enhanced oil recovery (EOR–CO2 method) were ranked. Ranking of the geological formation is based on the following criteria: storage capacity, total storage costs, risk assessment costs, storage time dynamics, risk of CO2 leakage from geological formation and risk of CO2 leakage through the well
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