Characteristic Features of the Movement of Elastic-Visco-Plastic Liquid in Pipes and Layers

Abstract

Hydrocarbon properties, specifically paraffins, asphaltenes, and resins, greatly affect various field practices such as
oil drilling, well operations, field development, and pipeline transportation. These compounds impart viscoelastic properties
to oils, which means they exhibit both viscous and elastic behavior. Consequently, the internal structure of these oils changes
at a slower rate compared to external conditions, leading to non-equilibrium effects.
To understand the viscoplastic elastic properties, we propose a model that considers the relaxation properties of the
system. This model reveals that over time, these properties result in reduced filtration processes and decreased well
productivity for hydrocarbons in porous media. We develop a representation of porous media movement in pipes to better
understand this behavior.
During the filtration process, the liquid behaves as if it consists of suspended small particles with long relaxation times
and viscoelasticity. These particles deform as they pass through the pipe and porous medium, effectively solidifying and
becoming fixed. This understanding of viscoelastic properties can be effectively utilized during drilling operations.
In specific scenarios, it may be advisable to drill intervals with abnormal oil when the dynamic water pressure in the
well is significantly lower than the formation pressure. This recommendation takes advantage of the unique properties of
viscoelastic oils.