New Correlation of Oil Compressibility at Pressures Below Bubble Point For Iraqi Crude Oil

Oil compressibility represents a significant character in reservoir simulation, design of surface facilities and the analysis well tests, specifically for systems below bubble point pressure.
 is not directly measured laboratory. It usually gained indirectly from experimental data recorded PVT reports. The relative volume flash test used to calculate oil at pressures above pressure. At point, behavior simulated by differential liberation test. solution gas-oil ratio formation factor are employed estimation pressure This paper purposes new correlation calculating isothermal coefficient formulation very difficult as it depends on many variables. property function variables such pressure, temperature, ratio, factor, stock-tank gravity, specific gravity gas factor.
 Standing’s (1), McCain et al. (2) Al-Jarri's (3) correlations were submitted testing their validity evaluate performance with Iraqi crude oils compare results correlation.
 achievement has been done using two hundreds nine points twenty tests that collected Southern fields. evaluation previous achieved graphical statistical methods. These checking methods show poor agreement between observed calculated values. 
 (graphical statistical) explain was this suitable oils.