Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL ANALYSIS OF THE START-UP FLOW OF MODEL WAXY OIL IN PIPELINE
Submission Author:
Roque Martins Duarte Junior , PR
Co-Authors:
Roque Martins Duarte Junior, Luiz Eduardo Marcon, Eduardo Matos Germer, Diogo Elias da Vinha Andrade, Cezar Otaviano Ribeiro Negrao
Presenter: Roque Martins Duarte Junior
doi://10.26678/ABCM.ENCIT2022.CIT22-0710
Abstract
During exploration in ultra-deep water, crude oil is transported from reservoirs to the seashore as it losses heat to the ocean floor. The temperature difference induces the cooling of the oil causing the precipitation of paraffin crystals, which may lead to oil gelation during an eventual line shutdown. The gelled crude oil has several no n-Newtonian behaviors, such as viscoplasticity, elasticity, time dependence, thermal and shear dependence. Understanding the influence of these variables on restart pressures is a difficult task due to the oil complexity. To restart the flow of the gelled oil it is usually necessary to impose pressures higher than the usual ones. If not controlled, high pressures may damage the pipeline causing environmental problems and financial losses. Therefore, the objective of this paper is to investigate how thermal dependence affects the pressures and restart time. To do so, flow start-up tests under different temperature and operation conditions were performed. The fluid used was a model waxy oil (5% wt.), which was studied on a laboratory-scale flow loop with thermal control. The results showed that the pressures and the restart times were influenced by temperature, cooling rate and pressurization during cooling.
Keywords
oil gelation, Non-Newtonian fluid, Model waxy oil, restart pressure, laboratory-scale flow loop
