Can I depend on excel sheet only to apply geomechanical estimations for the subsurface reservoir?
Yes, it is possible to estimate pore pressure, fracture gradient, and mud weight window using an Excel sheet. The equations used to calculate these parameters are relatively simple and can be programmed into an Excel spreadsheet.
For example, to estimate the pore pressure, you can use the following equation:
Pp = (0.052 x mud weight x TVD)
where Pp is the pore pressure in psi, mud weight is the density of the drilling fluid in lb/gal, and TVD is the true vertical depth of the well in feet.
To estimate the fracture gradient, you can use the following equation:
Fg = (Pp + (0.465 x mud weight x TVD))
where Fg is the fracture gradient in psi.
To estimate the mud weight window, you can use the following equation:
Mud weight window = (Fg - Pp)
where Mud weight window is the range of mud weights that can be used to drill the well safely.
You can input the values for mud weight and TVD into the spreadsheet, and the equations will calculate the values for Pp, Fg, and Mud weight window.
However, it is important to note that these calculations are based on simplified models and assumptions and should be verified through more rigorous analysis before being used in actual drilling operations.
please consider wellbore stability analysis when considering the mww.
1. kick limit (pore pressure)
2. breakout point(shear failure)
3. frac gradient (sh-min)
4. breakdown limit (tensile)
yes. send me your email and I will send you an excel file to perform the work
Ahmed Merzoug please Ahmed can you share this excel file with me
this is my e-mail
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