Crude oil is the oil that comes from the reservoir. Usually there is some processing to remove water and gas from the oil before it is put in storage tanks. Heavy oil is generally black in color, but some of the lighter crudes can be the color of motor oil. Gas condensate (liquids coming from a rich gas) condensate dropout and condensate blockage. We examine implications for production and methods for managing the effects of condensate dropout , including reservoir modeling to predict fi eld performance. Case studies from Russia, the USA and the North Sea describe fi eld practices and results. Forming Dewdrops A gas condensate is a single NGLs are used as inputs for petrochemical plants, burned for space heat and cooking, and blended into vehicle fuel. Higher crude oil prices have contributed to increased NGL prices and, in turn, provided incentives to drill in liquids-rich resources with significant NGL content.