This session explores advanced approaches to reservoir characterisation and field development, emphasising artificial intelligence in reservoir understanding and modelling. AI-driven simulation and forecasting reveal hidden dynamics, improve accuracy, and strengthen planning. Topics include managing unconventional and low-quality reservoirs, optimising water injection in mature fields, and strategies for carbonate reservoir development. Enhanced oil recovery in complex reservoirs will also be addressed, showcasing methods to maximise production. Together, these insights highlight how technology and engineering—powered by AI—enable sustainable reservoir management, unlock reserves, and boost petroleum resource recovery.