Synonym: Modified Black Oil fluid @model = MBO fluid @model = Volatile Oil fluid @model
Specific case of a 3-phase fluid model based on three pseudo-components :
water pseudo-component, which may include minerals (assuming formation water and injection water composition is the same) | |
dry gas pseudo-component |
existing in three possible phases :
water phase, consisting of Water component only | |
oil phase, consisting of dead Oil pseudo-component and dissolved dry Gas pseudo-componentt (called Solution Gas) | |
gas phase, consisting of dry Gas pseudo-component and vaporized dead Oil pseudo-component (called volatile oil) |
The volumetric phase-balance equations is:
s_w + s_o + s_g =1 |
where
share of total fluid volume occupied by water phase | |
share of total fluid volume occupied by oil phase | |
share of total fluid volume occupied by gas phase |
The accountable cross-phase exchanges are illustrated in the table below:
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Modified Black Oil fluid @model is widely used to model Volatile Oil Reservoir and Pipe Flow Simulations.
The relations between in-situ (at given temperature and pressure) and STP masses, volumes, densities and compressibilities are given by the following equations (see Derivation):
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In-situ oil-cut:
| In-situ gas-cut:
| In-situ water-cut:
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Surface oil mass rate:
| Surface gas mass rate:
| Surface gas mass rate:
| Surface total fluid mass rate:
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In-situ oil mass:
| In-situ gas mass:
| In-situ water mass:
| In-situ total fluid mass:
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In-situ oil density:
| In-situ gas density:
| In-situ water density:
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In-situ total fluid compressibility:
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where are Dynamic fluid properties.
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Fluid (PVT) Analysis / Fluid @model
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