Productivity Index for a Gas Well
Productivity Index for a Gas Well formula |
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\( J \;=\; \mu \; h \;/\; 1422 \; T \; [\; 0.5 \; ln \; ( 4 \; A \;/\; 1.781 \; k \; WB_r^2 ) + S \;] \) | ||
Symbol | English | Metric |
\( J \) = productivity index for a gas well | \(MSCF/day/psi^2/cP\) | - |
\( \mu \) (Greek symbol mu) = permability | \(mD\) | - |
\( h \) = thickness | \(ft\) | - |
\( T \) = temperature | \(R\) | - |
\( ln \) = natural logarithm | \(dimensionless\) | - |
\( A \) = drainage area | \(ft^2\) | - |
\( k \) = shape factor | \(dimensionless\) | - |
\( WB_r \) = wellbore radius | \(ft\) | |
\( S \) = skin | \(dimensionless\) |