Method of determining, displaying and using the relative changes of elastic modulus and density of underground rock

摘要

This invention provides a method for determining and exhibiting relative changes of the elastic modulus and relative changes of the density in the subsurface rocks, and a method for finding petroleum and natural gas, especially directly predicating natural gas and light oil by these relative changes. The relative changes of the elastic modulus is relative changes of Lame's constant Δμ/(μ+(2ν), relative changes of the shear modulus Δν/(μ+2ν), and/or Δν/[λ+(4/3ν], and changes of the bulk modulus Δλ/[λ+(4/3ν)], and the relative changes of the density is Δς/ς.