Method and apparatus for characterizing non-uniform spatial distribution characteristics of multi-scale geostress field

An apparatus for characterizing non-uniform spatial distribution characteristics of multi-scale geostress field, comprising:

• a first acquisition module, configured to obtain stress occurrence states at different crustal depths;
• a second acquisition module, configured to obtain deformation characteristics at the different crustal depths;
• a calculation module, configured to establish a finite element model of a target area and calculate stress field distribution by using constraints of measured stress states, inverted stress states, and the deformation characteristics at the different crustal depths, to thereby obtain crustal stress field distribution characteristics;
• and
• a processing module, configured to obtain correlation and non-uniformity characterization of stresses of deep and shallow crusts, based on stress field directions, stress field magnitudes, stress structures, and deformation characteristics of the deep and shallow crusts in the crustal stress field distribution characteristics;
• wherein the first acquisition module is specifically configured to obtain stress states at different depths of an upper crust using an in-situ stress measurement method and a borehole and rock core based testing method, and obtain stress states at focal depths using a focal mechanism solution inversion method;
• wherein the second acquisition module is specifically configured to obtain the deformation characteristics at the different crustal depths using surface deformation observation and seismic anisotropy methods;
• wherein the stress field directions are characterized by a maximum horizontal principal stress direction;
• the stress field magnitudes are characterized by principal stress values, lateral compression coefficients, stress accumulation parameters, and relative stress magnitudes;
• types of the stress structures are determined based on Anderson fault types and stress relationships;
• and the deformation characteristics of the deep and shallow crusts are characterized by maximum horizontal tensile strain rate-minimum horizontal principal stress-anisotropic fast wave polarization direction.