Halliburton’s Odassea™ Subsea Fiber Optic Solution provides topside distributed acoustic sensing (DAS) of subsea wells at lower total cost of ownership (TCO) for time-lapse (4D) seismic imaging using downhole fibers deployed to the production packer and reservoir diagnostics using downhole fibers deployed across reservoir. Topside distributed acoustic sensing (DAS) of subsea wells requires advanced optical engineering solutions to compensate for the reduced acoustic bandwidth, optical losses, and back reflections accumulated through umbilicals, multiple wet- and dry-mate optical connectors, splices, optical feedthrough systems, and downhole fibers. To address these issues, Halliburton’s Odassea™ Subsea Fiber Optic Solution consists of a subsea fiber network that limits the sensing fiber only to the downhole fiber to enable dry-tree equivalent acoustic sampling frequencies of 10+ kHz, while eliminating all back reflections from the multiple subsea connectors. The Odassea solution is capable of providing dry-tree equivalent acoustic sensing performance over the entire length of the subsea well regardless of the subsea tie-back distance. Leveraging Halliburton’s extensive experience in fiber optic sensing, Real-time data acquisition, processing, and analytics.