Description:

Dimensionless pressure as defined for constant-rate production

Excel Function Syntax:

ptaPd(P, Pi, q, k, h, B, mu)

Online Calculator:

Parameter Value Description
P pressure, psi
Pi original reservoir pressure, psi
q flow rate at surface, STB/D
k matrix permeability, md
h net formation thickness, ft
B formation volume factor, res vol/surface vol
mu viscosity, cp
Result

All functions from PTA category

# Function Description
1 ptaPd Dimensionless pressure as defined for constant-rate production
2 ptaTd Dimensionless time
3 ptaRwd Dimensionless radius
4 ptaLd Dimensionless distance
5 ptaCd Dimensionless wellbore storage coefficient
6 PdLSSIHR The expression of dimensionless line source solution pressure of infinite homogeneous reservoir.
7 PdwVWIHR Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir.
8 PdwVWIHRLSFB Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with linear sealing fault boundary.
9 PdwVWIHRLCPB Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with linear constant pressure boundary.
10 PdwVWIHRPSFB Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular sealing faults boundary.
11 PdwVWIHRPCPB Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular constant pressures boundary.
12 PdwVWIHRPMB Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular mixed boundaries (boundary 1 - fault, boundary 2 - constant pressure).
13 PwVWIHR Wellbore pressure drop for vertical well in infinite homogenous reservoir, [psi]
14 PwVWIHRLSFB Wellbore pressure drop for vertical well in infinite homogenous reservoir with linear sealing fault boundary, [psi]
15 PwVWIHRLCPB Wellbore pressure drop for vertical well in infinite homogenous reservoir with linear constant pressure boundary, [psi]
16 PwVWIHRPSFB Wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular sealing faults boundary, [psi]
17 PwVWIHRPCPB Wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular constant pressures boundary, [psi]
18 PwVWIHRPMB Wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular mixed boundaries (boundary 1 - fault, boundary 2 - constant pressure), [psi]