Difference between revisions of "Well Log Interpretation"

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(Summary Equations)
(Summary Equations)
 
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==Summary Equations==
 
==Summary Equations==
  
:<math> h_{well\ reservoir} = \Sigma</math>
+
:<math> h_{gross} = \Sigma h_{gross}</math>
 +
 
 +
:<math> h = \Sigma h </math> where Saturation=Oil
 +
 
 +
:<math> \phi = \frac{\Sigma (h*\phi)}{\Sigma h} </math> where Saturation=Oil
 +
 
 +
:<math> S_o = \frac{\Sigma (h*\phi*S_o)}{\Sigma (h*\phi)} </math> where Saturation=Oil
  
 
where
 
where
  
:<math> A </math> = Area, m2
+
:<math> h_{gross} </math> = Gross thickness, m2
 
:<math> h </math> = Net pay, oil saturated thickness, m
 
:<math> h </math> = Net pay, oil saturated thickness, m
:<math> HCPV </math> = Hydrocarbon pore volume, m3
+
:<math> \phi </math> = Porosity, fraction or %
:<math> \phi </math> = Porosity, fraction
+
:<math> S_o </math> = Oil saturation, fraction or %
:<math> S_o </math> = Oil saturation, fraction
+
 
 +
==Example==
 +
Calculate the summary of the well log interpretation above for the Б2(С1) reservoir.
 +
 
 +
:<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>
 +
 
 +
:<math>h = 1.2 + 5.2 + 5.8 + 1 + 1.5 = 14.7 m </math>
 +
 
 +
:<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>
 +
 
 +
:<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>
  
 
==Parameters==
 
==Parameters==
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*[[Perforations]]
 
*[[Perforations]]
 
*[[Well Log Interpretation]]
 
*[[Well Log Interpretation]]
 +
*[[HCPV]]
  
 
[[Category:E&P Portal]]
 
[[Category:E&P Portal]]

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