Pressure at the top of a Gas Influx in the Annulus using the "Driller's Method"
The pressure at the top of a gas bubble at any point in the annulus while circulating it out using the Driller’s method can be calculated as follows:
By calculating the expected annular pressures at the top of the influx at specific points along the wellbore together with the associated influx volumes at these points, comparisons can be made with actual values observed during circulating out the influx. This information can play . . .