GLOSSARY

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c = -  \frac{1}{B} \cdot \frac{dB}{dp}


For the slightly compressible fluid the fluid compressibility is not dependent on pressure  

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bodyc(p) = c = \rm const
 and Formation Volume Factor has a linear dependence on pressure
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bodyp
 with usually a very small gradient
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bodyc \sim 0 \Leftrightarrow c \cdot (p-p_i) \ll 1
:

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B(p) = B_i \cdot [1 - c \cdot (p - p_i) ]

where

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bodyp_i

some pressure point around which the dynamic process is happening

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bodyB_i

 Formation Volume Factor at this pressure point



The FVF values are usually used to recalculate the fluid volumes measured at surface to the fluid volumes which are produced from or injected to subsurface reservoir.

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