Critical water saturation is
the upper limit for formation water saturation above which a specific sample will produce a significant percentage of water with hydrocarbons
. For many years, critical water saturation has been estimated from routine porosity and permeability data.
What is water saturation means?
The fraction of water in a given pore space
. It is expressed in volume/volume, percent or saturation units. Unless otherwise stated, water saturation is the fraction of formation water in the undisturbed zone. … If used without qualification, the term usually refers to the effective water saturation.
What is critical oil saturation?
Critical saturation, whether gas or condensate, refers
to the minimum saturation at which a phase becomes mobile
. The endpoint saturation of a phase for a specific displacement process depends on: The structure of the porous material.
What is interstitial water saturation?
1. n. [Geology]
Water that occurs naturally within the pores of rock
. Water from fluids introduced to a formation through drilling or other interference, such as mud and seawater, does not constitute interstitial water.
How is water saturation measured?
Water saturation (S
w
) can be measured
directly from a sealed core
, which is an expensive method, or it can be calculated from the Archie equation, which is less expensive. S
w
can also be estimated using a graphical representation of the Archie equation known as the Pickett plot.
How do you calculate oil saturation?
- Gas saturation (Sg) = Vg ÷ Vp.
- Oil saturation (So) = Vo ÷ Vp.
- Water saturation (Sw) = Vw ÷ Vp.
- Sg + So + Sw = 1.
- References.
What is irreducible water saturation?
PetroWiki.
The fraction of the pore space occupied by water when the hydrocarbon content is at maximum
. This level of water can only be reduced by flow of very dry gas that evaporates the water. Typically shown as Sw
irr
.
What is effective saturation?
The
fraction of water in the pore space corresponding to the effective porosity
. … The saturation is known as the total water saturation if the pore space is the total porosity, but is called effective water saturation if the pore space is the effective porosity.
What is saturation definition?
Saturation means
holding as much moisture as possible
. When you water your houseplants, you may soak them until the soil around each plant reaches saturation. The noun saturation means the act of completely soaking something until it’s absorbed as much water as it can.
What is critical oxygen saturation?
Oxygen saturation values of 95% to 100% are generally considered normal. Values under 90% could quickly lead to a serious deterioration in status, and values
under 70%
are life-threatening.
What does interstitial fluid consist of?
Interstitial fluid contains
glucose, salt, fatty acids and minerals such as calcium, magnesium and potassium
. The nutrients in interstitial fluid come from blood capillaries Interstitial fluid can also hold waste products which result from metabolism.
Which of the following is an example of interstitial water?
An example of interstitial water molecule is
BaCl
2
. 2H
2
O
.
What is hydrogen bonded water?
Hydrogen Bonding in Water. The hydrogen bond in water is
a dynamic attraction between neighboring water molecules involving one hydrogen atom located between the two oxygen atoms
.
What is saturation height function?
The saturation-height function greatly impacts reserve calculations and is
used by geologists or reservoir engineers to predict the saturation in the reservoir for a given height above the free water level
. If cores are preserved, the water saturation information can be obtained directly.
How do you calculate formation factor?
Formation volume factor is defined as the ratio of gas volume at reservoir condition to the gas volume at standard condition, that is,(2.45)Bg=VVsc=pscpTTscZZSC=0.0283zTpwhere the unit of formation volume factor is
ft3/scf
.
What is saturated oil reservoir?
Saturated Oil Reservoirs
A saturated reservoir is
fully saturated with lighter hydrocarbon gases at that reservoir pressure
. Saturation means that the crude oil here is fully occupied with dissolved gases and will not take any extra gas bubbles at that pressure (point 2) unless we increase the pressure.
