Big picture on feasibility of geologic carbon storage in India Ajay Kumar Singh CSIR-CIMFR, Dhanbad, India
[email protected] Workshop on Carbon Capture, Storage and Re-Use in India IIT Bombay, Mumbai 30 September 2016 Contents of Presentation • Who we are • Introduction • Potential CO2 storage reservoirs — Oil reservoirs — Coal seams — Saline Aquifers — Basalt Formations • Conclusions Who We Are? • CIMFR is a constituent unit of CSIR, India, an autonomous body funded by the Ministry of Science and Technology, Government of India. • CIMFR’s objectives are to provide scientific and technological inputs to mineral sector for optimization of mining technologies for better safety, economy, conservation and environmental management. Contents of Presentation • Who we are • Introduction • Potential CO2 storage reservoirs — Oil reservoirs — Coal seams — Saline Aquifers — Basalt Formations • Conclusions What is CCS? CCS is a 3-step process: 1. Capturing CO2 at source. 2. Transportation (usually pipelines) 3. Storage (Geologic storage) Geologic Storage of Carbon The potential geologic storage reservoirs in India are: 1. Depleted oil & gas reservoirs/EOR or EGR 2. Un-mineable coal seams 3. Deep saline aquifers 4. Basalt formations Contents of Presentation • Who we are • Introduction • Potential CO2 storage reservoirs — Oil reservoirs — Coal seams — Saline Aquifers — Basalt Formations • Conclusions CO2 Storage in depleted oil/gas reservoirs Depending on pressure of injection, it can be miscible or immiscible: Miscible CO2-EOR: The CO2 mixes with the crude oil, oil swells and its viscosity is reduced. The reservoir pressure is also maintained. Extra crude oil in the reservoir to flow easily towards the production wells for its recovery. Immiscible CO2-EOR: When CO2 is used to re-pressure the depleted reservoir as a sweep gas to move oil towards the production well.