Figure 30: Simulation with choke closed
4.0 Conclusion
A drilling operation can only be successful if all tasks and activities are performed in an efficient manner. This means that the well must fully be under control at every time and this is only possible when engineers understand the role pressure relationships play in the wellbore and can detect when there is kick. Kick is the reason for the need for well pressure control. The results gotten from the simulation have shown us that the reservoir pressure is less than the well pressure hence there would be an influx of reservoir fluids into the formation meaning there is an overbalance. This is usually as a result of poor well planning. Lost circulation, insufficient mud density and swabbing or swabbing. In this case we are dealing with the use of invert emulsion muds to manage pressure control or kick hence the mud density has to be altered. This is because it does not exert enough hydrostatic pressure to match the well pressure which due to the extended reach of the well, it could be a problem of abnormally distributed pressure in the well. The aim and objectives of this paper have now been met as the rheological properties of Invert emulsion muds have been analysed and their use for pressure control stated.