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→Formation Volume Factor of two Phase
===<big>Formation Volume Factor of two Phase</big><big></big>===
===<big>Formation Volume Factor of two Phase</big><big></big>===
Above bubble point pressure, gas and oil combined in one phase. For this case, fluid volume in reservoir have different value in surface volume, and it is called two-phase formation volume factor (Bt), expressed by :
Above bubble point pressure, gas and oil combined in one phase. For this case, fluid volume in reservoir have different value in surface volume, and it is called two-phase formation volume factor (B<sub>t</sub>), expressed by:
: <math>B_t = B_o + B_g (R_{s_i} + R_s)</math>
Where,
Where, Rsi = saturated gas in oil, Bg formation volume factor gas, and Rs gas saturated under bubble point.
* R<sub>s<sub>i</sub></sub> = saturated gas in oil,
* B<sub>g</sub> = formation volume factor gas, and
* R<sub>s</sub> = gas saturated under bubble point
===<big>Oil Viscosity</big><big></big>===
===<big>Oil Viscosity</big><big></big>===