Speaker
Description
Energy geosciences fields in the context of carbon neutrality include geological storage of carbon dioxide and green hydrogen, enhanced geothermal energy utilization, efficient shale oil and gas extraction, high-level nuclear waste geological repository. It involves sandstone, carbonate rock, mudstone, salt rock, granite, basalt and other rocks, and natural fractures are commonly developed or artificial fractures are required for desired usage of various rock formations. Such a geological system involves a wide nm-μm scale pore size, various pore connectivity and wettability, in addition to the thermal-hydraulic-mechanical-chemical-biological (THMCB) coupled process of deep earth environments. Nano-petrophysics research includes the properties of rocks, fluids (formation water, liquid hydrocarbons, gases like hydrogen, supercritical CO2), and the interaction between rocks and fluids. This presentation focuses on the dual system of micro-nano pores and fractures in various rocks, by establishing a systematic methodology with complementary multi-approach and multi-scale fashion. We particularly demonstrate the unique applications of small-angle neutrons and X-ray scattering to examine total (including connected and “isolated”) porosity, fluid-wettable pore size distribution, fluid distribution in nano-confined space, and a direct observation of rock deformation behavior at a spatial resolution of 1 nm under high-pressure and high-temperature conditions with a custom-designed cell. In addition, the utilities of both hydrophilic and hydrophobic fluids as well as fluid invasion tests (imbibition, diffusion, vacuum saturation) followed by laser ablation-ICP-MS mapping of different custom-designed nm-sized tracers are illustrated for the tracer imaging in porous materials. The results indicate the microscopic pore connectivity and matrix-fracture interaction of various rocks play an important role in controlling macroscopic fluid flow and mass-heat transport and their applications of helping achieve the carbon neutrality goal.
| Country | China |
|---|---|
| Acceptance of the Terms & Conditions | Click here to agree |
