Abstract Virtual Flow Metering (VFM) is an increasingly attractive method for estimation of
multiphase flowrates in oil and gas production systems. Instead of using expensive …

Most model-based control and estimation techniques put limitations on the structure and
complexity of the models to which they are applied. This has motivated the development of …

We detail in this paper the importance of a change of strategy for the delay robust control of
systems composed of two linear first-order hyperbolic equations. One must go back to the …

We give a detailed view of estimation and control problems raised by the drilling process
where the distributed nature of the system cannot be ignored. In particular, we focus on the …

Robust flow measurement in multi-phase systems has extensive applications in
understanding, design, and operation of complex environmental, energy and industrial …

We propose a simple model of two-phase gas–liquid flow by imposing a quasi-equilibrium
on the mixture momentum balance of the classical transient drift-flux model. This reduces the …

The ability to perform accurate pore pressure and reservoir inflow estimation during a kick
incident is necessary, particularly when drilling in formations with narrow pressure margins …

Non-aqueous drilling fluids (such as synthetic-based mud) are frequently used to drill one or
more sections of an oil/gas well to reduce drilling problems such as shale sloughing …

The shift towards drilling more complex and challenging wells is continuing in the oil & gas
industry. Designing such complex wells with narrow error margins requires advanced well …

Two-phase flows are frequently modelled and simulated using the Two-Fluid Model (TFM)
and the Drift Flux Model (DFM). This paper proposes Stokes–Dirac structures with respect to …