Fluid and Temperature structure interaction
The fluids filling a well have two important effects. First, they affect any drillstring/BHA motions because of the friction they exert. In this respect the resonance frequencies depend on the viscous effects of the fluids and the oscillation amplitudes are damped by them.
Second, the fluids exert pressure on the structural elements of the well, which is important for the casing design. This pressure not only depends on the fluid properties i.e. the equation of state (often called PVTs) but also depends on the fluid flow rate and temperature vertical profile (fluid and temperature). A fluid circulating inside a well carries thermal energy. The local temperature and therefore pressure then result from the complex energy transfer phenomena (convection, conduction) within the well and with the surrounding formation.
Our goal is to develop an accurate numerical tool handling the evolution of pressure and temperature inside a well and along the different phases of its life : drilling, cementing, producing.