Table 1.
Coring information.
Fig 1.
Part of the core used for testing.
Fig 2.
MTS815 flex test GT.
Fig 3.
(a) Sample with sensor mounting, (b) Sample under load.
Fig 4.
Method for evaluating brittleness based on characteristics of stress-strain curves.
Fig 5.
Brittleness evaluation of Lu211 well (stress strain method).
Longyi-14: 1-0-1, Longyi-13: 2-0-2, Longyi-12: 3-0-1, Longyi-11: 6-0-1, Wufeng: 8-0-2, Baota: 9-0-2.
Fig 6.
Brittleness index trend graph with depth (stress strain method).
Table 2.
Rock mechanics parameters of Lu211 well under triaxial compression.
Fig 7.
Brittleness evaluation based on energy dissipation method.
Fig 8.
Brittleness evaluation of Lu211 well (energy dissipation method).
Longyi-14: 1-0-1, Longyi-13: 2-0-2, Longyi-12: 3-0-1, Longyi-11: 6-0-1, Wufeng: 8-0-2.
Table 3.
Summary of rock brittleness evaluation of Lu211 well (energy dissipation method).
Fig 9.
Brittleness index with depth (energy dissipation method).
Table 4.
Mineral components of Lu211 well.
Fig 10.
Brittleness index with depth (mineral component method).
Fig 11.
A brittleness evaluation method considering multiple methods.
Fig 12.
(a)Stress-strain method, (b)Energy dissipation method, (c)Mineral component method.
Table 5.
Sensitivity coefficient normalization.
Fig 13.
Brittleness evaluation method considering multiple factors.