Difference between revisions of "IPR"
From wiki.pengtools.com
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:<math> q = \frac{kh}{141.2 B \mu}\ (\bar{P} - P_{wf}) J_D</math> | :<math> q = \frac{kh}{141.2 B \mu}\ (\bar{P} - P_{wf}) J_D</math> | ||
| − | *[[Vogel IPR]] two phase equation ( | + | *[[Vogel IPR]] two phase equation (liquid + gas) |
| − | *[[Composite IPR]] | + | *[[Composite IPR]] |
===Gas well IPR equation === | ===Gas well IPR equation === | ||
Revision as of 11:45, 29 March 2019
Contents
Inflow Performance Relationship
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.
Math and Physics
Oil well IPR equation
- Darcy's law inflow equation for the single phase liquid:
- Vogel IPR two phase equation (liquid + gas)
- Composite IPR
Gas well IPR equation
- Darcy's law gas inflow equation:
- C and n equation
IPR calculator software
- PQplot nodal analysis software is used to calculate the IPR curves. PQplot is available online at www.pengtools.com.
- Excel
- other
Nomenclature
= formation volume factor, bbl/stb
= dimensionless productivity index, dimensionless
= permeability times thickness, md*ft
= average reservoir pressure, psia
= average reservoir pseudopressure, psia2/cP
= well flowing pressure, psia
= average well flowing pseudopressure, psia2/cP
= flowing rate, stb/d
= gas rate, MMscfd
= temperature, °R
Greek symbols
= viscosity, cp
