Assessing steam injection conformance is one of the challenges faced during developing a multi-zones steam flood project. Critical flow principle was used to develop downhole steam injection control techniques using Limited Entry Perforation and steam injection nozzles and orifices. Evaluating performance of these downhole completion accessories requires adopting and modifying several surveillance tools. Injection Logging Profile (IPL) Tools are used to monitor steam distribution in multi-zones steam injection wells and to investigate steam flow behavior in the wellbore. This paper reviews steam injector surveillance techniques in a giant steam flood field located in south Oman. The article will list advantages, limitations, and the challenges faced with the various interpretation methods including temperature logs, simple flow meters, radioactive tracers, and Pulse Neutron tool surveys. Steam quality estimation methodology will be presented employing logging data and semi-analytical wellbore heat transfer models.