10,323
edits
Changes
Jump to navigation
Jump to search
Line 55:
Line 55: − +
→Volumetric estimation
* ø = [[porosity]] (decimal) from log and/or core data
* ø = [[porosity]] (decimal) from log and/or core data
* ''S''<sub>w</sub> = connate water saturation (decimal) from log and/or core data
* ''S''<sub>w</sub> = connate water saturation (decimal) from log and/or core data
* B<sub>oi</sub> = formation volume factor for oil at initial conditions (reservoir bbl/STB) from lab data; a quick estimate is ''B''<sub>oi</sub> = 1.05 + (''N'' × 0.05), where ''N'' is the number of hundreds of ft<sup>3</sup> of gas produced per bbl of oil [for example, in a well with a GOR of 1000, ''B''<sub>oi</sub> = 1.05 + (10 × 0.05)]
* B<sub>oi</sub> = formation volume factor for oil at initial conditions (reservoir bbl/STB) from lab data; a quick estimate is <math>B_{oi} = 1.05 + (N \times 0.05)</math>, where ''N'' is the number of hundreds of ft<sup>3</sup> of gas produced per bbl of oil [for example, in a well with a GOR of 1000, ''B''<sub>oi</sub> = 1.05 + (10 × 0.05)]
Another basic volumetric equation is
Another basic volumetric equation is