Difference between revisions of "Well Log Interpretation"

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[[Well Log Interpretation]] is a summary of a well log.
 
[[Well Log Interpretation]] is a summary of a well log.
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Used in [[Mature Water Flood Analysis]] for calculating [[HCPV]] for Blocks and Patterns.
  
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==[[Well Log Interpretation]] Parameters==
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[[File:Well Log Interpretation.png|800px|Well Log Interpretation]]
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==Summary Equations==
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:<math> h_{gross} = \Sigma h_{gross}</math>
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:<math> h = \Sigma h </math> where Saturation=Oil
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:<math> \phi = \frac{\Sigma (h*\phi)}{\Sigma h} </math> where Saturation=Oil
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:<math> S_o = \frac{\Sigma (h*\phi*S_o)}{\Sigma (h*\phi)} </math> where Saturation=Oil
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where
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:<math> h_{gross} </math> = Gross thickness, m2
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:<math> h </math> = Net pay, oil saturated thickness, m
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:<math> \phi </math> = Porosity, fraction or %
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:<math> S_o </math> = Oil saturation, fraction or %
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==Example==
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Calculate the summary of the well log interpretation above for the Б2(С1) reservoir.
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:<math> h_{gross} = 1+1.5+1+0.9+0.6+1.2+1.7+5.2+5.8+0.7+0.7+1.3+0.8+1+0.6+1+1.5+0.9+0.7+1.1+2.2+1.1+2.6 = 35.1 m </math>
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:<math>h = 1.2 + 5.2 + 5.8 + 1 + 1.5 = 14.7 m </math>
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:<math>\phi = \frac{1.2*13.4 + 5.2*19 + 5.8*12 + 1*17.2 + 1.5*16.6}{1.2 + 5.2 + 5.8 + 1 + 1.5} = 226.58 / 14.7 = 15.4%</math>
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:<math>S_o = \frac{1.2*13.4*0 + 5.2*19*97.1 + 5.8*12*94.8 + 1*17.2*0 + 1.5*16.6*0}{0 + 5.2*19 + 5.8*12 + 0 + 0} = 19161.6 / 168.4 = 96.1%</math>
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==Parameters==
 
*Reservoir
 
*Reservoir
 
*Zone
 
*Zone
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*[[Perforations]]
 
*[[Perforations]]
 
*[[Well Log Interpretation]]
 
*[[Well Log Interpretation]]
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*[[HCPV]]
  
 
[[Category:E&P Portal]]
 
[[Category:E&P Portal]]
 
[[Category:Subsurface]]
 
[[Category:Subsurface]]
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{{#seo:
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|title=Well Log Interpretation
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|titlemode= replace
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|keywords=Well Log Interpretation, net thickness, porosity, oil saturation
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|description=Well Log Interpretation is a summary of a well log.
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}}

Latest revision as of 13:09, 2 April 2022

Brief

Well Log Interpretation is a summary of a well log. Used in Mature Water Flood Analysis for calculating HCPV for Blocks and Patterns.

Well Log Interpretation

Summary Equations

h_{gross} = \Sigma h_{gross}
h = \Sigma h where Saturation=Oil
\phi = \frac{\Sigma (h*\phi)}{\Sigma h} where Saturation=Oil
S_o = \frac{\Sigma (h*\phi*S_o)}{\Sigma (h*\phi)} where Saturation=Oil

where

h_{gross} = Gross thickness, m2
h = Net pay, oil saturated thickness, m
\phi = Porosity, fraction or %
S_o = Oil saturation, fraction or %

Example

Calculate the summary of the well log interpretation above for the Б2(С1) reservoir.

h_{gross} = 1+1.5+1+0.9+0.6+1.2+1.7+5.2+5.8+0.7+0.7+1.3+0.8+1+0.6+1+1.5+0.9+0.7+1.1+2.2+1.1+2.6 = 35.1 m
h = 1.2 + 5.2 + 5.8 + 1 + 1.5 = 14.7 m
\phi = \frac{1.2*13.4 + 5.2*19 + 5.8*12 + 1*17.2 + 1.5*16.6}{1.2 + 5.2 + 5.8 + 1 + 1.5} = 226.58 / 14.7 = 15.4%
S_o = \frac{1.2*13.4*0 + 5.2*19*97.1 + 5.8*12*94.8 + 1*17.2*0 + 1.5*16.6*0}{0 + 5.2*19 + 5.8*12 + 0 + 0} = 19161.6 / 168.4 = 96.1%

Parameters

  • Reservoir
  • Zone
  • Top MD
  • Bottom MD
  • h_gross - gross thickness
  • h - net thickness
  • Saturation
  • RT - resistivity
  • Porosity
  • Sw
  • So
  • Sg
  • k_absolute
  • k_oil_effective
  • kh_oil
  • k_gas_effective
  • kh_gas
  • Version
  • Date Interpreted

Upload

Well Log Interpretations are uploaded to the E&P Portal here.

See Also

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