Laboratory evaluation of damage criteria and permeability of Big Hill salt.

Ehgartner, Brian L. ; Park, Byoung Yoon ; Lee, Moo Yul ; Bronowski, David R.

Sandia National Laboratories

关键词: Stresses;    Compression;    Salt Deposits;    Texas Salt Domes;    Permeability.;   

DOI  :  10.2172/920727
RP-ID  :  SAND2004-6004
RP-ID  :  AC04-94AL85000
RP-ID  :  920727

美国|英语

来源: UNT Digital Library

【 摘 要 】

To establish strength criteria of Big Hill salt, a series of quasi-static triaxial compression tests have been completed. This report summarizes the test methods, set-up, relevant observations, and results. The triaxial compression tests established dilatant damage criteria for Big Hill salt in terms of stress invariants (I{sub 1} and J{sub 2}) and principal stresses ({sigma}{sub a,d} and {sigma}{sub 3}), respectively: {radical}J{sub 2}(psi) = 1746-1320.5 exp{sup -0.00034I{sub 1}(psi)}; {sigma}{sub a,d}(psi) = 2248 + 1.25 {sigma}{sub 3} (psi). For the confining pressure of 1,000 psi, the dilatant damage strength of Big Hill salt is identical to the typical salt strength ({radical}J{sub 2} = 0.27 I{sub 1}). However, for higher confining pressure, the typical strength criterion overestimates the damage strength of Big Hill salt.