GMI-Literature-E

UCS = 0.2215 ´ E^0.712

where:

0.2215 is a non-dimensional constant.

E is static Young modulus in psi.

This equation is derived from a synthesis of published data on 15 samples representing strong and compacted shales, with an average Young’s modulus of 4.35E + 6 psi. No information about the nature of samples and test procedures is available. The applicability of the equation to well logs is limited to high-density shales with a known static-dynamic correction factor.