How to sustain a CO2-thermosiphon in a partially saturated geothermal reservoir: Lessons learned from field experiment and numerical modeling

Comprehensive Review and Perspectives of CO2 Hydrate Storage in Subseafloor Saline Sediments: Formation, Stability, and Optimization Strategies

“…By strategically placing heat sources in specific locations within the sediments, researchers can harness geothermal energy to induce localized heating. 254,255 This minimizes the need for external energy inputs and aligns with sustainable practices. Utilizing geothermal gradients provides a cost-effective and energy-efficient alternative, demonstrating the potential for harnessing naturally occurring thermal resources to optimize CO 2 hydrate formation and stability in subseafloor saline sediments.…”

“…In contrast to controlled heating methods, utilizing geothermal gradients for localized heating offers a unique and environmentally friendly strategy. , This approach capitalizes on the natural temperature gradients in subseafloor environments. By strategically placing heat sources in specific locations within the sediments, researchers can harness geothermal energy to induce localized heating. , This minimizes the need for external energy inputs and aligns with sustainable practices. Utilizing geothermal gradients provides a cost-effective and energy-efficient alternative, demonstrating the potential for harnessing naturally occurring thermal resources to optimize CO 2 hydrate formation and stability in subseafloor saline sediments. , Researchers exploring thermal manipulation strategies can benefit from considering both controlled heating methods and the innovative use of geothermal gradients to advance CO 2 hydrate.…”

CO2-plume geothermal: Power net generation from 3D fluvial aquifers

“…To tackle these issues, two alternative scenarios are proposed. The first is to use CPG in depleted oil reservoirs, or the reservoirs that currently include CO 2 from sequestration processes, such as the SECARB Cranfield Site that a brine-saturated sand has been under CO 2 flood [14]. The second is to use CPG in shallower depths and smaller scales for peak shaving purposes, such as [70,71].…”

GeoVision Analysis: Exploration Task Force Report

“…A thermosiphon was briefly established between an injection/production well pair separated by 100 m, but it was not sustainable. While a simplified model of the field test (Freifeld et al, 2016) predicted a sustainable thermosiphon, a detailed numerical model (Pan et al, 2018) was able to reproduce the actual field behavior, and in a series of sensitivity studies, factors were identified that could potentially contribute to the failing of a sustainable thermosiphon. These factors can be categorized as two types: (1) factors that increase the resistance to flow, and (2) factors that increase the heat loss of the working fluid.…”