Reservoir Simulation PVT data---Density vs Pressure?

[soi]

eclipse for example,we often input PVT data such as PVTO,PVTG,PVDG..

most of them are GOR vs PRESSURE, BO vs PRESSURE table and so on.

why it doesnt have density vs PRESSURE table?

but the question is oil density change when formation pressure variation,

in reservoir simulation (black oil model)the only density we input is surface density.

does anyone notice that?

[itag]

Sol
For a standard Black-oil model, in-situ oil and gas density are determined indirectly through their surface densities and input Rs(P), Bg(P) and Bo(P) data. For example gas density (Rv=0) is =const*gas_den_sc/Bg, oil density is ( (rho_oil_sc+Const*Rs_rho_gas_sc)/Bo
You'll find these equations in the (Eclipse) technical manual under "Reservoir Densities". You should be able to estimate oil and gas densities very quickly given someone's input deck. ( BTW - same story for brine density ... Bw ~ 1 ( but it varies with salinity and temperature)

itag

[soi]

i got what you said

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