Seismic amplitude variation with angle response of hydrogen-saturated rock: Implications on subsurface monitoring Available to Purchase

We study the seismic response of the injected hydrogen in the subsurface with the intention of developing an effective seismic monitoring approach to detect hydrogen leakage during and after storage. As a type of clean energy, the stored hydrogen within the subsurface can be later extracted to meet cyclic energy demand, which can also reduce carbon emissions. After hydrogen injection into the subsurface, the subsurface elastic properties (e.g., velocity and density) will change, leading to different seismic responses, which allows tracing the injected hydrogen plume based on rock properties. To quantify the influence of hydrogen, theoretical and numerical forward modeling is a straightforward tool to explore the relationship between the seismic response and relevant properties of the hydrogen-saturated rock. Using the rock physics model, we focus on the theoretical analysis of the properties and variations of the subsurface media and amplitude variation with angle/offset (AVA/AVO) response of a porous reservoir partially saturated by hydrogen and brine. During our test, we found that porosity, hydrogen saturation, and fluid distribution pattern (patchiness) strongly impact the behavior of seismic responses.