Modeling the viscoelasto-plastic behavior of waxy crude

Modeling the rheological behavior of waxy crude oils as a function of flow and temperature history

Nonlinear Rheology, Yielding, and Constitutive Modeling of Waxy Crude Oils

In this work, the rheological behavior of a group of model crude oils is experimentally studied at temperatures below their wax appearance temperature (WAT). We consider both a two-component wax-oil system and a three-component oil-water emulsion that is partially stabilized by precipitated wax. We characterize the shear-localization and yielding using a combined approach of bulk rheometry and ...

Measurement and Prediction of Time-independent and Time-dependent Rheological Behavior of Waxy Crude Oil

Wax deposition phenomenon changes the rheological behavior of waxy crude oil completely. In the current work, the rheological time-dependent and time-independent behaviors of waxy crude oil samples are studied and flow curve and compliance function are measured for the oil samples with various wax contents at different temperatures. A decrease in temperature and an increase in wax content lead ...

Low Temperature Rheological Behavior of Umbarka Waxy Crude and Influence of Flow Improver

L’objet de cette étude est de déterminer les caractéristiques du brut paraffinique d’Umbarka, avec et sans additif pour l’amélioration de l’écoulement, à savoir, l’écoulement à basse température, le point d’écoulement, et les données rhéologiques. Les caractéristiques rhéologiques du brut font apparaître un comportement d’écoulement pseudoplastique avec une limite élastique non newtonienne ains...

Rheo-PIV Analysis of the Yielding and Flow of Model Waxy Crude Oils

Waxes are a commonly encountered precipitate that can result in gelation of crude oils and cessation of flow in pipelines. In this work we develop a model wax-oil system that exhibits rheological behavior similar to waxy crude oils encountered in production scenarios. To study the consequences of gelation on the rheology of the model system we perform simultaneous measurements of the bulk flow ...