Patent ID: 9689207
Date: 2017-06-27
CPC Classifications: E21B,G06F

Claim:
1. A computer-implemented method for optimization of a wellbore, which comprises: calculating a field scale model for multiple well paths in a production field using a computer processor, each well path representing a potential well bore trajectory; calculating a Formation Loading Potential for the field scale model and plotting a distribution of the Formation Loading Potential along each well path; selecting a well path having a lowest peak value of Formation Loading Potential, the selected well path representing an optimal wellbore trajectory for the wellbore; calculating a primary submodel using the selected well path, the primary submodel comprising a wellbore interval containing the peak value of Formation Loading Potential for the selected well path; calculating a secondary submodel of the wellbore interval, the secondary submodel comprising a predetermined casing for the wellbore and an elasto-plastic prediction of a casing failure value for the predetermined casing; determining an optimal casing strength for the wellbore; and displaying the secondary submodel for a section of graphically reproduced predetermined casing; drilling the wellbore along the selected well-path; and installing casing in the wellbore with the optimal casing strength.