The invention discloses an earthquake underground fluid inspection well and a
system and a method used the earthquake underground fluid inspection well to detect seismic precursor abnormal information of gap
pressure diffusion coefficients, which relate to earth
physics and quakeproof disaster reduction technology. The earthquake underground fluid inspection well is arranged vertical to the direction of strata, a
corrosion resisting seal stainless steel sleeve is installed in the center of the inspection well in the middle,
cement is used at the bottom and the top of the inspection well for fixing a sleeve, a stainless steel clamp is adopted to fix the sleeve at the position of the axial center of the stainless steel sleeve additionally, multimode fibers are buried in a gap between the sleeve and the well wall, ore particles are filled in the gap between the sleeve and the well wall, so that an even gap medium layer is formed. A special high-resolution-ratio
fiber sensor collects
gas pressure dynamic response signals stimulated by earthquake
cutting waves, a data analyzing
system is integrated through a maximum likelihood
deconvolution space-time conservation method and a weight
integral method chips, characteristic scale of the dynamic gap
pressure diffusion coefficients related to the
cutting waves is obtained through calculation, an earthquake source generated the earthquake
cutting waves is carried out high-precision earthquake location, scientific decision-making data with earthquake source physical significances are provided to seismic prediction. The obtaining method of the characteristic scale of the dynamic gap
pressure diffusion coefficients can be used for well wall fracture monitor of oil exploitation wells and
carbon dioxide geology seal injection wells.