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A new approach to reduce the formation fluid invasion during well control operations

Tekdal, Gazel
Well control technique is particularly important in oil and gas operations such as drilling, well work over, and well completions because of higher drilling costs, waste of natural resources, and the possible loss of lives of rig personnel. It is known very well that the larger the volume of influx, the more difficult to bring the well under control. The aim of this study is to lessen volume of influx from the formation by shut-in the well with a new well control approach. This approach is based on decreasing the difference between the formation pressure and the bottom-hole pressure by pumping drilling mud after shut-in. A multiphase dynamic well control simulator has been used to demonstrate results of study. It was observed that when this new approach was applied, the volume of formation fluid invasion and stabilization time decrease.