Abstract:
First, this paper has deduced theoretically calculation formula of coupling coefficient of observational well-hole of borehole body strain, and according to Kelvin tidal theory set up the calculation model of tidal factor observation by borehole body strain. It has studied the relation between the change characteristics of tidal factors (δ) and elastic coefficient of rocks (E
3, υ
3), and indicated the nonliner relation of δ with E
3 and υ
3. The bigger E
3 and υ
3 are, the bigger δ is. When E
35 ×10
10pa, δ is influenced obviously. Conversely it is influenced weakly. And δ is compared and analysised with real observational data.