Note on calculation of PWRI well injectivity

The flow rate of natural gas is often expressed as MMSCFD (millions of standard cubic feet per day). The calculation in Example #11 gives actual cfs (ACFS). The flow rate in ACFS can be converted to SCFS (standard cfs) with the following equation: SCFS = ACFS(Pave/Pb)(Tb/Tave) Where: SCFS is the flow rate in standard cubic feet per second. ................
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