Deployment | Borehole |
---|---|
Log Name | CAP |
Measured Property | Fluid capacitance |
Sensor Type | Capacitor |
Units | |
SI | dimensionless |
Oil Metric | dimensionless |
Oil Field | dimensionless |
Applications
- Assesing donwhole flowrate
Sample Logs
Tool Schematic
Mathematical Model
Y = \frac{Y_w s_w + Y_o s_o + Y_g s_g}{\mathring{Y}_w} |
where
\{ s_w, \ s_o, \ s_g \} – volumetric fractions of water, oil and gas phase ( s_w + s_o + s_g = 1),
\{ Y_w , \ Y_o , \ Y_g \} – are reference values for capacitance of water, oil and gas at given temperature and pressure,
\mathring{Y}_w fresh water capacitance at NTP.
The typical values are:
Y_{\rm gas} | 7 |
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Y_{\rm oil} | 15 – 30 |
Y_{\rm water} | 100 |