Three-dimensional geomechanical modeling of casing deformation for hydraulic fracturing treatment design

A system comprising:

• at least one processor;
• and
• a memory coupled to the processor having instructions stored therein, which when executed by the processor, cause the processor to perform functions including functions to:
• generate a three-dimensional (3D) global model of a subsurface formation targeted for a multistage hydraulic fracturing treatment to be performed along a planned trajectory of a wellbore within the subsurface formation;
• calculate values of material parameters for different points of the subsurface formation represented by the 3D global model, based on a geomechanical analysis of well log data obtained for the subsurface formation;
• assign the calculated values to corresponding points of the 3D global model;
• generate a 3D sub-model of a selected portion of the subsurface formation including a casing to be placed along the planned trajectory of the wellbore within the subsurface formation, based at least partly on the values assigned to the 3D global model;
• apply one or more numerical damage models to the 3D global model to simulate hydraulic fracturing effects of one or more stages of the multistage hydraulic fracturing treatment on the subsurface formation;
• apply the one or more numerical damage models to the 3D sub-model to simulate the hydraulic fracturing effects of the one or more stages of the multistage hydraulic fracturing treatment on the casing along the planned trajectory of the wellbore within the subsurface formation, based on the simulation using the 3D global model;
• and
• estimate at least one value of casing deformation for each of a plurality of fluid injection pressures associated with the one or more stages of the multistage hydraulic fracturing treatment along the planned trajectory of the wellbore, based on the simulation using the 3D sub-model, the value of casing deformation representing at least one of a maximum lateral displacement value or a maximum vertical displacement value of the casing for one or more sections of the wellbore along the planned trajectory.

A computer-readable storage medium having instructions stored therein, which when executed by a computer cause the computer to perform a plurality of functions, including functions to:

• generate a three-dimensional (3D) global model of a subsurface formation targeted for a multistage hydraulic fracturing treatment to be performed along a planned trajectory of a wellbore within the subsurface formation;
• calculate values of material parameters for different points of the subsurface formation represented by the 3D global model, based on a geomechanical analysis of well log data obtained for the subsurface formation;
• assign the calculated values to corresponding points of the 3D global model;
• generate a 3D sub-model of a selected portion of the subsurface formation including a casing to be placed along the planned trajectory of the wellbore within the subsurface formation, based at least partly on the values assigned to the 3D global model;
• apply one or more numerical damage models to the 3D global model to simulate hydraulic fracturing effects of one or more stages of the multistage hydraulic fracturing treatment on the subsurface formation;
• apply the one or more numerical damage models to the 3D sub-model to simulate the hydraulic fracturing effects of the one or more stages of the multistage hydraulic fracturing treatment on the casing along the planned trajectory of the wellbore within the subsurface formation, based on the simulation using the 3D global model;
• and
• estimate at least one value of casing deformation for each of a plurality of fluid injection pressures associated with the one or more stages of the multistage hydraulic fracturing treatment along the planned trajectory of the wellbore, based on the simulation using the 3D sub-model, the value of casing deformation representing at least one of a maximum lateral displacement value or a maximum vertical displacement value of the casing for one or more sections of the wellbore along the planned trajectory.