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Line 22: − + − {| class = "wikitable"+ − |-+ − ! Step+ − ! Action+ − |-+ − | 1+ − | Determine [[buoyancy pressure]] (''P''<sub>b</sub> ) at the depth of the measured pressure (P<sub>m</sub> ) from the measured pressure: − − − − |- − | 2 − | Determine buoyancy pressure gradient (''P''<sub>bg</sub> ): − − − − |- − | 3 − | Calculate downdip length of hydrocarbon column (''h''): − − − − |}
Free water level determination using pressure (view source)
Revision as of 15:03, 2 December 2014
, 15:03, 2 December 2014→Procedure using a single measurement
==Procedure using a single measurement==
==Procedure using a single measurement==
The table below outlines the procedure for determining the free water level using a single [[Pressure_transient_testing#Pressure_drawdown_and_buildup_tests|pressure buildup]] point in the reservoir.
The list below outlines the procedure for determining the free water level using a single [[Pressure_transient_testing#Pressure_drawdown_and_buildup_tests|pressure buildup]] point in the reservoir.
# Determine [[buoyancy pressure]] (''P''<sub>b</sub> ) at the depth of the measured pressure (P<sub>m</sub> ) from the measured pressure:
#*:<math>P_{\rm b} = P_{\rm m} - P_{\rm hydrostatic}</math>
# Determine buoyancy pressure gradient (''P''<sub>bg</sub> ):
#*:<math>P_{\rm bg} = P_{\rm hydrostatic\ pressure\ gradient} - P_{\rm hydrocarbon\ pressure\ gradient}</math>
# Calculate downdip length of hydrocarbon column (''h''):
#*:<math>h = \frac{P_{\rm b}}{P_{\rm bg}}</math>
:<math>P_{\rm b} = P_{\rm m} - P_{\rm hydrostatic}</math>
:<math>P_{\rm bg} = P_{\rm hydrostatic\ pressure\ gradient} - P_{\rm hydrocarbon\ pressure\ gradient}</math>
:<math>h = \frac{P_{\rm b}}{P_{\rm bg}}</math>
As an example, let's determine the downdip length of a 30°API oil column with the following givens:
As an example, let's determine the downdip length of a 30°API oil column with the following givens: