Difference between revisions of "OptiFrac"

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(Used correlations)
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* Select and copy results to Excel or other applications
 
* Select and copy results to Excel or other applications
  
== Used correlations ==
+
== References ==
 
+
Rueda JI, Mach J, Wolcott D (2004) Pushing fracturing limits to maximize producibility in turbidite formations in Russia. Paper SPE 91760.
<table width="100%" border="1" cellpadding="3" cellspacing="1">
 
<tr>
 
<th>Type of problem</th>
 
<th>Correlation</th>
 
<th>Reference</th>
 
</tr>
 
 
 
<tr><td>
 
Oil well [[VLP]]
 
</td><td>
 
[[Hagedorn and Brown correlation|Hagedorn and Brown]] + [[Griffith correlation| Griffith]]
 
</td><td>
 
Hagedorn, A. R., & Brown, K. E. (1965). Experimental study of pressure gradients occurring during continuous two-phase flow in small-diameter vertical conduits. Journal of Petroleum Technology, 17(04), 475-484.
 
</td></tr>
 
<tr><td>
 
Gas well [[VLP]]
 
</td><td>
 
[[Gray correlation|Gray]]
 
</td><td>
 
Gray, H. E. (1974). Vertical flow correlation in gas wells. User manual for API14B, subsurface controlled safety valve sizing computer program.
 
</td></tr>
 
<tr><td>
 
Dry gas [[VLP]]
 
</td><td>
 
[[Fanning correlation|Fanning]]
 
</td><td>
 
Cullender, M.H. and Smith, R.V. 1956. Practical Solution of Gas-Flow Equations for Wells and Pipelines with Large Temperature Gradients. Trans., AIME 207: 281.
 
</td></tr>
 
<tr><td>
 
Oil well inflow
 
</td><td>
 
Composite IPR based – Vogel equations taking into account water
 
</td><td>
 
Kermit E. Brown "The Technology of Artificial Lift
 
Methods" Vol. 4 Production Optimization of Oil and Gas
 
Wells by Nodal System Analysis, p. 30, section 2.227.1
 
</td></tr>
 
<tr><td>
 
Gas well inflow – backpressure equation
 
</td><td>
 
Rawlins and Schellhardt
 
</td><td>
 
Rawlins, E.L. and Schellhardt, M.A. 1935. Backpressure Data on Natural Gas Wells and Their Application to Production Practices, Vol. 7. Monograph Series, USBM.
 
</td></tr>
 
<tr><td>
 
Gas well inflow – pseudo-pressure equation using Jd and kh values
 
</td><td>
 
Real-gas pseudopressure equation
 
</td><td>
 
See for example: Ahmed, T., & McKinney, P. (2011). Advanced reservoir engineering. Gulf Professional Publishing.
 
</td></tr>
 
<tr><td>
 
[[Liquid loading]]
 
</td><td>
 
Turner
 
</td><td>
 
Turner, R. G., Hubbard, M. G., and Dukler, A. E. (1969) “Analysis and Prediction of Minimum Flow Rate for the Continuous Removal of Liquids from Gas Wells,” Journal of Petroleum Technology, Nov. 1969. pp. 1475–1482.
 
</td></tr>
 
<tr><td>
 
[[Erosional velocity]]
 
</td><td>
 
Guidelines from API RP14E
 
</td><td>
 
Mokhatab S, Poe WA, Speight JG (2006) "Handbook of Natural Gas Transmission and Processing", Section 11.6 - Design Considerations on sales gas pipelines, subsection 11.6.1 - Line Sizing Criteria, Elsevier, 2006.
 
</td></tr>
 
</table>
 
 
 
 
 
PVT correlations are the same as in [[PVT tool|PVT tool]].
 
  
 
[[Category:optiFrac]]
 
[[Category:optiFrac]]
 
[[Category:pengtools]]
 
[[Category:pengtools]]

Revision as of 15:44, 30 June 2017

Brief

optiFrac is a fracture design optimization tool.

For the given set of reservoir and propane properties it calculates maximum achievable well productivity index and required fracture geometry.

pengtools optiFrac

Typical applications

  • Single Well Fracture Design and Sensitivity Studies
  • Optimum fracture design parameters determination:
    • Dimensionless productivity index, JD .
    • Dimensionless Fracture conductivity, CfD .
    • Fracture half length, Xf .
    • Fracture width, w .
    • Fracture penetration, Ix .

Main features

  • Plot of JD as a function of CfD and Ix as parameter.
  • Plot of JD as a function of CfD and Np as parameter.
  • Design optimization curve which corresponds to the maximum JD values for different Np.
  • Design Optimum Point at which the dimensionless productivity index, JD, is maximized for the given proppant, fracture and reservoir parameters.
  • Physical constraints envelope.
  • Proppant library with predefined proppant properties.
  • Users Data Worksheet for benchmarking vs actual.

Interface features

  • Save and share models with colleagues
  • Last saved model on current computer and browser is automatically opened
  • Metric and US oilfield units
  • Save as image and print plots by means of chart context menu (button at the upper-right corner of chart)
  • Download pdf report with input parameters, calculated values and plots
  • Select and copy results to Excel or other applications

References

Rueda JI, Mach J, Wolcott D (2004) Pushing fracturing limits to maximize producibility in turbidite formations in Russia. Paper SPE 91760.