Fiber optic technology offers a robust, passive alternative that survives these harsh conditions for decades. Techniques like distributed acoustic sensing (DAS). Permanent downhole fiber-optic cables are critical infrastructure in wellbore monitoring systems, ensuring reliable transmission of data for applications such as distributed temperature, acoustic, and strain sensing (DTS, DAS, and DSS)—all with one 1/4-in control line. CCS is an emerging. Paper presented at the SPE Conference at Oman Petroleum & Energy Show, Muscat, Oman, May 2026. However, execution is challenging, particularly with respect to deploying. This study presents a comparative analysis between these conventional approaches and the latest distributed fiber-optic sensing (DFOS) technologies.