ptaLd

Dimensionless pressure as defined for constant-rate production

Dimensionless time

ptaRwd – Dimensionless radius

Dimensionless wellbore storage coefficient

The expression of dimensionless line source solution pressure of infinite homogeneous reservoir.

Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir.

Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with linear sealing fault boundary.

Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with linear constant pressure boundary.

Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular sealing faults boundary.

Dimensionless wellbore pressure drop for vertical well in infinite homogenous reservoir with perpendicular constant pressures boundary.