Difference between revisions of "Prats effective well radius"
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:<math>r_{w_{eff}}=r_w e^{-S}</math> | :<math>r_{w_{eff}}=r_w e^{-S}</math> | ||
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===Skin equation=== | ===Skin equation=== | ||
:<math>S = ln \left ( \frac{r_w}{r_{w_{eff}}} \right ) = ln \left ( \frac{2 r_w}{X_f} \right )</math> | :<math>S = ln \left ( \frac{r_w}{r_{w_{eff}}} \right ) = ln \left ( \frac{2 r_w}{X_f} \right )</math> | ||
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| + | ==Nomenclature== | ||
| + | :<math>r_{w}</math> = wellbore radius, length | ||
| + | :<math>r_{w_{eff}}</math> = effective well radius, length | ||
| + | :<math>S</math> = skin factor, dimensionless | ||
| + | :<math>X_f</math> = fracture half length, length | ||
==References== | ==References== | ||
Revision as of 05:46, 28 April 2020
Prats effective well radius equation
It appears that the behavior of vertically fractured reservoirs can be interpreted in terms of simple radial-flow reservoirs of large wellbore.— Prats, 1961
Skin equation
Nomenclature
= wellbore radius, length
= effective well radius, length
= skin factor, dimensionless
= fracture half length, length
References
- Prats, M., Hazebroek, P., and Strickler, W.R. 1962. Effect of Vertical Fractures on Reservoir Behavior--Compressible-Fluid Case. SPE J. 2 (2): 87-94.
