Determining Rupture Envelopes of A Fault System

A computing system comprising:

• one or more processors;
• and
• a memory system comprising one or more non-transitory computer-readable media storing instructions that, when executed by at least one of the one or more processors, cause the computing system to perform operations for determining rupture envelopes for a fault system, the operations comprising:
• obtaining a representation that depicts one or more faults in a region of the earth as triangulated surfaces;
• selecting variables from among parameters comprising stress ratio, orientation of far field stress maximum principal stress, intermediate principal stress, minimum principal stress for the far field stress, and sliding friction and cohesion of the fault system;
• determining a strain energy of a triangular element based on a friction coefficient, a normal stress on the triangular element, and a cohesion for the variables;
• summing the strain energy of each triangle in the triangulated surfaces to yield an effective shear strain energy;
• extracting one or more iso-surfaces of the effective shear strain energy based on the summing;
• and
• creating one or more rupture envelopes for specific values of the effective shear strain energy based on the extracting.

A non-transitory computer-readable medium storing instructions that, when executed by at least one processor of a computing system, cause the computing system to:

• obtain a representation that depicts one or more faults in a region of the earth as triangulated surfaces;
• select variables from among parameters comprising stress ratio, orientation of far field stress maximum principal stress, intermediate principal stress, minimum principal stress for the far field stress, and sliding friction and cohesion of the fault system;
• determine a strain energy of a triangular element based on a friction coefficient, a normal stress on the triangular element, and a cohesion for the variables;
• sum the strain energy of each triangle in the triangulated surfaces to yield an effective shear strain energy;
• extract one or more iso-surfaces of the effective shear strain energy based on the summing;
• and
• create one or more rupture envelopes for specific values of the effective shear strain energy based on the extracting.