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