Coupled Geochemical and Compositional Wellbore Simulators: A Case Study on Scaling Tendencies Under Water Evaporation and CO2 Dissolution

ABSTRACT Inorganic deposits are the result of mineral precipitation due to changes in pressure and temperature along water flow and one of the main causes of production decline in the Oil & Gas Industry, as water is usually inherent to any oil/gas production. These deposits may be present in the reservoir, wellbore, and processing facilities. Literature suggests that evaporation of water can significantly increase (if not be the main cause of) mineral precipitation and consequently scale deposition for a gas condensate well. This work aims to determine if evaporation can also play a similar role for an oil well. New achievements to an integrated platform (called UTWELL, for wellbore simulation) are addressed; however, emphasis is given to the effects of a newly added evaporation model in the case of an offshore oil production well showing calcite precipitation. Results demonstrate that evaporation is only relevant for very small water-cuts (