HPHT Micro-to-Nano Seismic Comparison of GEIOS Nitrogen Hybrid Gas Nanofoam vs. Water-Proppant EGS

ABDELMOUMEN SHAD SERROUNE , Harris Sackiewsky, Jan Sopaheluwakan, Khasani IR, Edwin Larry Zhang

Statement of peer-review status: This is a non-peer-reviewed preprint. The work derives from internal laboratory testing at Nanogeios Laboratory and has not been submitted to a peer-reviewed journal. For patent and intellectual-property security, certain sources and proprietary technical details (e.g., exact nanoparticle composition and surfactant/stabiliser chemistry) are intentionally not disclosed.

This study presents a comparative analysis of the mechanical and seismic performance of GEIOS nitrogen hybrid gas nanofoam versus conventional water-proppant fluids in Enhanced Quantum Geothermal (EQG) reservoirs. Under matched High-Pressure High-Temperature (HPHT) triaxial conditions (80-140 MPa confinement, 300 C), the nitrogen-based nanofoam reduced total acoustic-emission (AE) event counts by 49% and shifted the b-value to 1.52, compared to traditional water-proppant controls. These data suggest a distributed-microcracking failure mode that significantly lowers the induced-seismicity signature, addressing the primary barrier to geothermal deployment. While core-scale laboratory tests indicate superior aperture stability and thermal diffusivity, field-scale validation is required to confirm reservoir-scale fault mitigation.