Cementing (Model Outputs)
Depth Channels
- Overbalance Pressure - The amount of pressure in the wellbore that exceeds the pressure of fluids in the formation. Calculated as
OBP=AP-PPAP - annulus pressure;
PP - reservoir pore pressure;
- Gas-flow potential factor - is the estimated amount of gas flow that can be expected from a formation. Calculated as
GFPF=MPR/OBPOBP - Overbalance Pressure
MPR - Theoretical maximum pressure restriction. Calculated as
MPR=SGS/300*L/DSGS - Static gel strength, lb/100 sq f (Entered on the Fluid Recipe Page)
300 - Conversion factor (to obtain MPR in psi), lb/in
L - length of the cement column, ft
D - = effective diameter of the cement column, in. (hole diameter minus pipe diameter)
Note: when excess volume is entered - hole diameter is calculated from effective diameter
