As repeatedly urged, readers need to be familiar with the basic structure/features of global oil refining, if they wish to 
make informed contributions towards Guyana’s first oil, particularly in view of the fact that a local refinery would likely contribute marginally (0.1 per cent) to global refining capacity. As indicated, there are already, worldwide, over 650 refineries in 116 countries. Today’s column completes the summary description of global refining, and includes information for the Caribbean (and Caricom) region.