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Fibre-Optic Distributed Temperature Sensing (DTS) has been integrated into sand control completions in the giant Azeri Chirag Guneshli (ACG) field offshore Azerbaijan to provide real time production logging and assist with the management of the field’s complex reservoirs. The optimization of gas lift for better well performance, well integrity risk identification and the determination of gas and water breakthrough locations are some of the benefits that the DTS data has provided. Deployment of the fibre-optic system in the ACG field required a fiber-optic wet-mate and the ability to deploy fiber to distances up to 12km. Lessons learned from those deployments have yielded a number of best practices and design optimizations for the integrated completion system. These optimizations include hardware and software advancements, procedural changes for improved deployment reliability and the incorporation of critical pre-job checks at the vendor’s workshop prior to equipment load out to the rig. Maximizing reservoir potential and optimizing reservoir drainage is a critical part of the project economics for the ACG field and reliable sand control completions providing real time reservoir surveillance by means of DTS has proven to be a key technology for achieving this.