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No change in size ,  13:38, 30 October 2014
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where
 
where
   −
* <math>\text{Change in pore volume} = \frac{NB_{oi}}{(1 - S_{wi}c_fP)}</math>
+
* <math>\text{Change in pore volume} = \frac{NB_{oi}}{(1 - S_{wi})}c_fP</math>
 
* Change in oil volume = ''NB''<sub>oi</sub> –(''N'' – ''N''<sub>p</sub>)''B''<sub>oi</sub>
 
* Change in oil volume = ''NB''<sub>oi</sub> –(''N'' – ''N''<sub>p</sub>)''B''<sub>oi</sub>
 
* Change in gas volume = (''GB''<sub>gi</sub> – ''GB''<sub>g</sub>) + [''N''<sub>p</sub>''R''<sub>p</sub> ''(N'' – ''N''<sub>p</sub>) – NR<sub>si</sub>]''B''<sub>g</sub> due to gas produced, evolved, and encroached from a gas cap
 
* Change in gas volume = (''GB''<sub>gi</sub> – ''GB''<sub>g</sub>) + [''N''<sub>p</sub>''R''<sub>p</sub> ''(N'' – ''N''<sub>p</sub>) – NR<sub>si</sub>]''B''<sub>g</sub> due to gas produced, evolved, and encroached from a gas cap

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