Difference between revisions of "OptiFrac"

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(Created page with "__TOC__ == Brief == PQplot calculates inflow performance relationship (IPR) and vertical lift performance (VLP) curves for oil and gas wells. == Typical applications include...")
 
 
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== Brief ==
 
== Brief ==
  
PQplot calculates inflow performance relationship (IPR) and vertical lift performance (VLP) curves for oil and gas wells.
+
[[optiFrac]] is a hydraulic fracture design optimization tool.  
  
== Typical applications include ==
+
For the given set of reservoir and propane properties it calculates maximum achievable well productivity index and required fracture geometry.
  
* Estimation of flow rates
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[[File:OptiFrac_i.png|thumb|right|200px|link=https://www.pengtools.com/optiFrac|pengtools optiFrac]]
* Selection of tubing size
 
* Selection of flowline size
 
* Selection of wellhead pressures and surface choke sizing
 
* Estimation of the effects of reservoir pressure depletion
 
* Identification of flow restrictions
 
  
 +
== Typical applications ==
 +
 +
* Single Well Fracture Design
 +
* Design Sensitivity Studies and Benchmarking
 +
* Optimum fracture design parameters determination:
 +
** Dimensionless productivity index, '''J<sub>D</sub>''' .
 +
** Dimensionless Fracture conductivity, '''C<sub>fD</sub>''' .
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** Fracture half length, '''X<sub>f</sub>''' .
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** Fracture width, '''''w''''' .
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** Fracture penetration, '''I<sub>x</sub>''' .
  
 
== Main features ==  
 
== Main features ==  
* Plot of Inflow performance curve (IPR) and Vertical lift performance curve (VLP)
 
* Rate and pressure at intersection point
 
* Sensitivity analysis of IPR and VLP curves on parameters
 
* Using prepared PVT models
 
* Inclined wells calculations
 
* Tubing, annular and both flow types
 
  
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* Plot of '''J<sub>D</sub>''' as a function of '''C<sub>fD</sub>''' and '''I<sub>x</sub>''' as parameter.
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* Plot of '''J<sub>D</sub>''' as a function of  '''C<sub>fD</sub>''' and  '''N<sub>p</sub>''' as parameter.
 +
* Design optimization curve which corresponds to the maximum '''J<sub>D</sub>''' values for different '''N<sub>p</sub>'''.
 +
* Design Optimum Point at which the dimensionless productivity index, '''J<sub>D</sub>''', 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 ==  
 
== Interface features ==  
  
[[File:PQPLOT_i.png|thumb|left|200px|link=http://www.pengtools.com/pqPlot|PEngTools pqPlot]]
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* Save and share models with colleagues
 
 
<div style="margin-left:220px">
 
* Save and share references to saved models with colleagues
 
 
* Last saved model on current computer and browser is automatically opened
 
* Last saved model on current computer and browser is automatically opened
* Choose between Metric units and US oilfield units
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* Metric and US oilfield units
* Save as image and print plot by means of chart context menu (button at the upper-right corner of chart)  
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* Save as image and print plots by means of chart context menu (button at the upper-right corner of chart)  
* Download report in pdf format containing input parameters, calculated values and plot
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* Download '''pdf''' report with input parameters, calculated values and plots
* Select and copy results to Excel or other application
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* Select and copy results to Excel or other applications
</div>
 
 
 
<div style="clear:both"></div>
 
 
 
== Used correlations ==
 
 
 
<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]].
+
== References ==
 +
Rueda JI, Mach J, Wolcott D (2004) Pushing fracturing limits to maximize producibility in turbidite formations in Russia. Paper SPE 91760.
  
 
[[Category:optiFrac]]
 
[[Category:optiFrac]]
 
[[Category:pengtools]]
 
[[Category:pengtools]]
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 +
{{#seo:
 +
|title=optiFrac - Hydraulic Fracture Design Optimization Software
 +
|titlemode= replace
 +
|keywords=hydraulic fracturing, hydraulic fracturing formulas, hydraulic fracturing proppant, optimization, petroleum engineering
 +
|description=optiFrac - Hydraulic Fracture Design Optimization Software
 +
}}

Latest revision as of 07:55, 7 December 2018

Brief

optiFrac is a hydraulic 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
  • Design Sensitivity Studies and Benchmarking
  • 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.