Abstract
The productivity or deliverability of a gas well is strongly influenced by additional pressure drop around the wellbore resulting from permeability damage, partial penetration/ completion and non-Darcy flow. Non-Darcy flow is mainly due to combination of high velocity around wellbore (turbulence effect) and convective acceleration of fluid particles when passing through pore spaces (inertial effect). Non-Darcy flow or turbulence is something which can’t be removed because it occurs in gas reservoirs and hence, it needs to be dealt with.Direct assessment of turbulence can be obtained from multi-rate well test interpretation. In the current research work, effect of turbulence on gas well deliverability was analyzed analytically and validated through sensitivity analysis on well testing software.
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