Difference between revisions of "JD"

From wiki.pengtools.com
Jump to: navigation, search
(Math & Physics)
(Math & Physics)
Line 5: Line 5:
 
==Math & Physics==
 
==Math & Physics==
  
From the [[Darcy's Law]] for an unfractured well located in the center of a circular
+
From the [[Darcy's law]] for an unfractured well located in the center of a circular
 
drainage area, the [[JD]] in pseudo-steady state is as follows:
 
drainage area, the [[JD]] in pseudo-steady state is as follows:
 
:<math> {J_D} = \frac{1}{ln{/frac{r_e}{r_w}-\frac{3}{4}+S}} </math>
 
:<math> {J_D} = \frac{1}{ln{/frac{r_e}{r_w}-\frac{3}{4}+S}} </math>

Revision as of 14:34, 11 August 2018

Brief

JD - dimensionless productivity index, inverse of dimensionless pressure (based on average pressure) [1].

Math & Physics

From the Darcy's law for an unfractured well located in the center of a circular drainage area, the JD in pseudo-steady state is as follows:

 {J_D} = \frac{1}{ln{/frac{r_e}{r_w}-\frac{3}{4}+S}}

Oil

 {J_D} = \frac{141.2 B \mu}{kh} \frac{q}{\Delta P}

Gas

J_D=\frac{1422 \times 10^3\ T_R}{kh} \frac{q_g}{P_{\bar{P}}-P_{P_{wf}}}

References

  1. Rueda, J.I.; Mach, J.; Wolcott, D. (2004). "Pushing Fracturing Limits to Maximize Producibility in Turbidite Formations in Russia"Free registration required (SPE-91760-MS). Society of Petroleum Engineers.