PEEG 216 Reservoir Fluid Properties - Class 12 - 13&amp;14MAR10

# PEEG 216 Reservoir Fluid Properties - Class 12 - 13&14MAR10

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Reservoir Fluid Properties PEEG 216 PEEG 216 RESERVOIR FLUID PROPERTIES Dr. John Williams Class 12

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Reservoir Fluid Properties PEEG 216 Outline Correction Reminder of what we have learnt about reservoir fluid phase diagrams Complete section on Fluid Types Homework
Reservoir Fluid Properties PEEG 216 Mid-term Exam This is on Wednesday 24 th March In the first e-mail I said Wednesday 23 rd of March (which won’t happen until next year!)

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Reservoir Fluid Properties PEEG 216 Fluid Type Rules: Reservoir fluids are often subdivided into five fluids types (Chapter 5) Shape of the diagram depends on composition Fluid type depends on reservoir pressure and temperature Beware: Once the reservoir enters the two- phase region, one fluid is produced preferentially, which changes the composition, and thus the phase diagram.
Reservoir Fluid Properties PEEG 216 Saturation Status A saturated reservoir is one where the reservoir pressure is equal to bubble point or dew point pressure (it usually indicates the fluid is in equilibrium with a gas cap or oil leg somewhere) An under-saturated reservoir exists at a pressure above bubble point or dew point. Production starts with expansion drive until saturation pressure is reached. The word saturated refers to the idea that an oil fluid is “full of gas” (there is at least one bubble that cannot dissolve), and similarly for a gas fluid.

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Reservoir Fluid Properties PEEG 216 Main Two Fluid Types If T c > T res , the fluid is called an oil If T c < T res , the fluid is called a gas So these are clear-cut definitions…. except that: If T c ≈ T res , the fluid is critical or near-critical fluid The critical temperature is a function of the composition of the fluid. Its relation to the reservoir temperature determines fluid type experimentally.
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