- Dona Paula, Goa, India.
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- iiosc2020[at]nio[dot]org
Abstract Submission No. | ABS-2022-13-0078 |
Title of Abstract | A review on enhance oil recovery through CO2 capture in deep-sea sediments |
Authors | Subhashree Mishrahree Mishra* |
Organisation | CSIR- National Institute of Oceanography, Dona Paula, Goa |
Address | CSIR- National Institute of Oceanography Panaji, Goa, India Pincode: 403004 Mobile: 9337574370 E-mail: subhashree.geology@gmail.com |
Country | India |
Presentation | Oral |
Abstract | Enhanced oil recovery (EOR) through CO2 injection is a striking recovery practice that involves the injection of CO2 molecules into the deep sea reservoirs and produce oil/gas from the geological formations >3000m depth, which is conventionally difficult to extract. CO2 capture-enhanced oil recovery (CO2-EOR) and storage is currently the most effective and economic technology for reducing CO2 emissions and inject within near-permanent geologic reservoirs. At the high pressures and low temperatures which is common in deep-sea sediments, CO2 exist in in its liquid state and can be denser than the overlying pore fluid, making the injected CO2 to be gravitationally stable. The booming industrial revolution, over burning of fossil fuels (coal, oil and natural gas) and decontrolled deforestation leads to release of huge amount of toxic fumes into the atmosphere. Carbon Dioxide (CO2) capture and burial in deep sea geological formations along with oil recovery from same formation has emerged as an important option for reducing greenhouse gas emissions as well as bridging the gap between energy need and availability. The physical and chemical interaction of injected CO2 with rocks and fluids that are residing in the reservoir, create favorable mechanisms for enhanced oil recovery. The advanced mechanisms involving displacement of crude oil by injecting CO2 needs through investigation about several aspects such as an increase of oil density, a reduction of the viscosity of the original crude oil, vaporization of intermediate components of the oil, a reduction of CO2-oil interfacial tension, oil swelling, a reduction of waterâ¿¿oil interfacial tension, and an improvement of reservoir permeability. The technologies for capturing, separation, transportation, storage, leakage, monitoring and life cycle analysis of CO2 for different geological formations need appropriate study. In USA and China, enhanced oil recovery through CO2 storage has been established and practiced since long back but its economic feasibility for CO2 production from anthropogenic sources needs to be validated for sedimentary geological formations. For effective recovery, factors such as the reservoir fluid and rock characteristics, availability of injection material and equipment are major components. Now-a-days, India is also growing interests in CO2 storage in saline aquifers and deep sea sedimentary formations due to their enormous potential storage capacity and several projects are in the pipeline for the demonstration of its viability. |