Difference between revisions of "IPR"

Revision as of 11:05, 29 March 2019

Inflow Performance Relationship Curve

IPR is relationship between well bottomhole pressure and well production rate, usually in a form of a curve.

IPR curve shows productive capacity and performance of a well.

IPR curve is used in Nodal Analysis for production systems design, analysis and optimization.

q = \frac{kh}{141.2 B \mu}\ (\bar{P} - P_{wf}) J_D

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

PQplot nodal analysis software is used to calculate the IPR curves. PQplot is available online at www.pengtools.com.
Excel
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B

= formation volume factor, bbl/stb

J_D

= dimensionless productivity index, dimensionless

kh

= permeability times thickness, md*ft

\bar{P}

= average reservoir pressure, psia

P_{\bar{P}}

= average reservoir pseudopressure, psia²/cP

P_{wf}

= well flowing pressure, psia

P_{P_{wf}}

= average well flowing pseudopressure, psia²/cP

q

= flowing rate, stb/d

q_g

= gas rate, MMscfd

T

= temperature, °R

\mu

= viscosity, cp

@@ Line 8: / Line 8: @@
 [[IPR]] curve is used in Nodal Analysis for production systems design, analysis and optimization.
-===Oil Well IPR===
+===Oil Well IPR equation===
 *[[Darcy's law]] inflow equation for the single phase liquid:
@@ Line 16: / Line 16: @@
 *[[Composite IPR]]
-===Gas Well IPR===
+===Gas Well IPR equation ===
 *[[Darcy's law]] gas inflow equation: