Abstract: A method (710) can include receiving data for fractures associated with a geologic environment (712); performing stress inversion, based at least in part on a portion of the data and assignment of different mechanical fracture types to different populations of the fractures, to recover tectonic stress (716); and outputting the tectonic stress (720).

Abstract: A method, apparatus, and program product evaluate fracture abundance in a subsurface formation by modeling a fracture network in a three-dimensional volume using geometric primitives and based at least in part on geomechanical simulation of mechanical properties of the subsurface formation.

Abstract: A method, apparatus, and program product utilize projection-based area operations to accelerate the determination of subsurface structure parameters for subsurface structures such as fractures, faults and horizons in a subsurface formation.

Abstract: A method (710) can include receiving data for fractures associated with a geologic environment (712); performing stress inversion, based at least in part on a portion of the data and assignment of different mechanical fracture types to different populations of the fractures, to recover tectonic stress (716); and outputting the tectonic stress (720).

Abstract: A method, apparatus, and program product utilize projection-based area operations to accelerate the determination of subsurface structure parameters for subsurface structures such as fractures, faults and horizons in a subsurface formation.

Abstract: A method, apparatus, and program product evaluate fracture abundance in a subsurface formation by modeling a fracture network in a three-dimensional volume using geometric primitives and based at least in part on geomechanical simulation of mechanical properties of the subsurface formation.

Abstract: A method for predicting fault activity of a subsurface volume includes obtaining a model of the subsurface volume based on far field stress tensors, identifying faults in the subsurface volume, generating results corresponding to sole contribution from a fault for each of the far field stress tensors, selectively combining, for each of the far field stress tensors and based on a fault activity Boolean vector, the results as scaled linearly independent contribution to a superpositioned result, calculating a cost function representing a difference between the superpositioned result and a measurement of the subsurface volume, and minimizing the cost function by iteratively adjusting an optimization parameter for each far field stress tensors and iteratively adjusting the fault activity Boolean vector, to generate a prediction of the fault activity of the subsurface volume.

Abstract: A method for predicting regional stress of a subsurface volume includes obtaining a model matrix of the subsurface volume representing a relationship between a modeled fault slip result generated by a model and a boundary condition applied to the model, the boundary condition having a regional stress attribute and a fault friction attribute, calculating, using the model, the modeled fault slip result based on a selected value of the stress attribute and a selected value of the friction attribute, calculating a cost function representing a difference between the modeled fault slip result and a measurement of the subsurface volume, and minimizing the cost function by iteratively adjusting at least the selected value of the stress attribute to generate a prediction of the regional stress of the subsurface volume.

Abstract: Systems and methods for predicting a stress attribute of a subsurface earth volume. One or more linearly independent far field stress models and one or more discontinuity pressure models may be simulated for the subsurface earth volume to generate stress values, strain values, displacement values, or a combination thereof for data points in the subsurface earth volume. A processor may be used to compute a superposition of the one or more linearly independent far field stress models and the one or more discontinuity pressure models. The stress attribute of the subsurface earth volume may be predicted, based on the computed stress values, strain values, displacement values, or the combination thereof.

Abstract: A method can include providing fault geometry data and fracture data for a fracture; estimating a parameter value of a far field stress based at least in part on the fault geometry data and the fracture data; and determining an undisturbed parameter value for the fracture. Various other apparatuses, systems, methods, etc., are also disclosed.