Abstract
Controlling gas kick is essential to guarantee safe drilling of oil wells. As the gas flows toward the surface, its volume increases due to gas expansion, reducing mud weight. As a result, an uncontrolled gas kick may produce a blowout. A literature review, concerning MPD (Managed Pressure Drilling) technology, unveils that there is a gap regarding experimental validation of gas kick control strategies. Therefore, the main objective of this paper is building an experimental unit, representing the oil well drilling process, for dynamic gas kick control validation. Pressure, flow and level data are employed for real-time monitoring and control purposes. A drift-flux mathematical model (DFM) and a control reconfiguration scheme are validated using two-phase flow data from the experimental facility. The transient nature of the oil well drilling process, exhibiting a variety of operational modes and being nonlinear was successfully regulated by control reconfiguration, which works as an advanced control holistic structure.
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