Dynamic strain detection for cable orientation during perforation operations

A system for perforating a wellbore, comprising:

• a perforation assembly configured to generate a shockwave in a perforation stage that propagates throughout said wellbore by firing a perforation device at a perforating direction;
• an interrogator unit including a fiber optic cable deployed in said wellbore and configured to use said fiber optic cable to measure said shockwave at said fiber optic cable, said fiber optic cable being an existing cable;
• and
• a processor configured to determine an orientation of said fiber optic cable relative to said perforating direction based on said shockwave and said perforating direction;
• wherein said perforation assembly is further configured to change said perforating direction to be 90 degrees from said orientation of said fiber optic cable for a subsequent perforation stage of said wellbore to minimize damage to said fiber optic cable during said subsequent perforation stage.

A method of perforating a wellbore, comprising:

• generating, in at least one perforation stage, at least one shockwave that propagates throughout said wellbore by firing a perforation device at a perforating direction;
• measuring said shockwave at a fiber optic cable in said wellbore using said fiber optic cable, said fiber optic cable being an existing cable;
• determining an orientation of said fiber optic cable relative to said perforating direction based on multiple shockwaves and corresponding perforating directions from multiple perforation stages;
• and
• changing said perforating direction based on said orientation of said fiber optic cable for a subsequent perforation stage of said wellbore to minimize damage to said fiber optic cable during said subsequent perforation stage.