Fold Catastrophe Model of Reservoir-Induced Seismicty
WANG Zhi-qiang
HAN Jin-sheng
PAN Yue
Abstract：A "water weakening" function, φ(ω), was proposed to predict the effect of water level on reservoir-induced seismic activity (RISA). Catastrophe theory was used to analyze the mechanism of strike-slip fault movement during RISA. A fold catastrophe model for the rock- fault system surrounding a reservoir was established. RISA was predicted by the model and a critical condition where the system becomes unstable was noted. This critical condition is given by the ratio, K, of the stiffness to (the absolute value of) softness in the surrounding rock.Water in the reservoir reduced stiffness and the softening region of the constitutive curve becomes steeper. This makes it easy for the critical condition, K<1, to occur. Hence, RISA is induced in the rock-fault system surrounding the reservoir.
Keywords：reservoir-induced seismictyfold catastrophefaultwater weakeningenergy importing rate
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)