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→Wellbore volumes
All important wellbore volumes are calculated with a single formula:
All important wellbore volumes are calculated with a single formula:
:<math>\mbox{V}_{\rm bpf} = (\mbox{D}_{\rm L}{}^{2} - \mbox{D}_{\rm S}{}^{2})/1029.4</math>
:<math>\mbox{V}_{\rm bpf} = \frac{(\mbox{D}_{\rm L}{}^{2} - \mbox{D}_{\rm S}{}^{2})}{1029.4}</math>
Volumes are reported in units of barrels and can be calculated for an in-gauge hole by using this equation to determine volume in barrels per foot, then multiplying that value by the length of the section of hole in feet. (Note: washouts and thick mud cake can substantially alter hole volume.)
Volumes are reported in units of barrels and can be calculated for an in-gauge hole by using this equation to determine volume in barrels per foot, then multiplying that value by the length of the section of hole in feet. (Note: washouts and thick mud cake can substantially alter hole volume.)