Well flow efficiency (geothermal well)

Input(s)

$p^{*}$: Horner's False Pressure at $(\mathrm{t}+\Delta \mathrm{t}=1)(\mathrm{psi})$

$P_{w f}$: Bottomhole Pressure at a flowing well (psi)

$\Delta p_{\text {skin }}$: Pressure Drop caused by the Skin Effect (psi)

Output(s)

$F E$: Flow Efficiency (per cent)

Formula(s)

$$ F E=\frac{p^{*}-p_{w f}-\Delta p_{s k i n}}{p^{*}-p_{w f}} $$

Reference(s)

Ramey Jr, H. J. (1981). Reservoir Engineering Assessment of Geothermal Systems. Department of Petroleum Engineering, Stanford University, Page: (5.14).