Effects of Fracture Connectivity on Rayleigh Wave Dispersion
نویسندگان
چکیده
Passive seismic characterization is an environmentally friendly method to estimate the properties of subsurface. Among its applications, we find monitoring geothermal reservoirs. One key characteristic ensure a productive management these reservoirs degree fracture connectivity and evolution, as it affects flow fluids within formation. In this work, explore effects on Rayleigh wave velocity dispersion accounting for wave-induced fluid pressure diffusion (FPD) effects. To end, consider stratified reservoir model with fractured water-bearing For stochastic network prevailing in formation, varying levels density connectivity. A numerical upscaling procedure that accounts FPD employed determine corresponding body velocities. We use Monte-Carlo-type approach obtain velocities incorporate them considered assess sensitivity Our results show phase group exhibit significant connectivity, which mainly due reduction stiffening effect residing connected fractures response FPD. These cannot be accounted by classical elastic approaches. This suggests changes, are commonly associated changes density, may also related interconnectivity pre-existing or newly generated fractures.
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ژورنال
عنوان ژورنال: Journal Of Geophysical Research: Solid Earth
سال: 2022
ISSN: ['2169-9356', '2169-9313']
DOI: https://doi.org/10.1029/2021jb022847