How do you calculate gas formation volume factor?

How do you calculate gas formation volume 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 gas volume factor?

Gas formation volume factor is defined as the ratio of gas volume under reservoir conditions to the gas volume at STP, expressed as(2.62)Bg=VVsc=pscpTTsczzsc=0.0283zTpwhere.

What is two phase formation volume factor?

From the figure above it should be clear that the two phase oil formation volume factor ( ) is the total volume at reservoir conditions (liquid phase + gas phase) divided by its resulting oil-phase at standard conditions.

How do you calculate water formation volume factor?

The produced water formation volume factor (FVF), Bw, is defined as the volume at reservoir conditions occupied by 1 stock tank barrel (STB) of formation water plus its dissolved gas….Nomenclature.

Is STB the same as BBL?

1 General definitions. Oilfield units volumes in oilfield units are barrels (bbl or B); 1 bbl=5.615 ft3 or 0.159 m3. A STB is the same volume defined at some surface standard conditions (in the stock tank) which are usually 60°F and 14.7 psi. (See formation volume factor.)

What is oil formation volume factor?

Oil formation volume factor is defined as the volume of oil (and dissolved gas) at reservoir pressure and temperature required to produce one stock tank barrel of oil at the surface.

How do you calculate formation factor?

Unless otherwise stated, the term formation factor usually refers to the apparent formation factor. F has been related to porosity (phi) by several formulae (Archie, Humble and others) that have the general expression F = a / phim, where a is a constant and m the porosity exponent.

What is gas viscosity?

The viscosity of a gas can be thought of as a measure of its resistance to flow and is measured in the CGS unit Poise = dyne sec/cm2. The viscosity of gases near room temperature are in the centiPoise range, so that is a commonly used unit. Gas viscosity is only weakly dependent on pressure near atmospheric pressure.

What is gas factor?

The gas correction factor (GCF) is used to indicate the ratio of flow rates of different gases for a given output voltage from a mass flow controller (MFC). The basis gas is nitrogen (N2) which, by convention, has GCFN2 = 1. When using the GCF, the accuracy of the flow reading may vary by +/-5%.

What is STB in oil and gas?

Term. Definition. STB. Stock tank barrel, the volume of a barrel of oil at the earth’s surface as opposed to the corresponding volume in the subsurface.

What is formation factor in oil and gas?

What is the equation for volume of gas?

According to the ideal gas law, the pressure (P) and volume (V) of a gas are mutually dependent on temperature (T) and the number of moles of gas present (n). The ideal gas equation is PV = nRT, where R is a constant known as the ideal gas constant.

What is gas expansion factor?

Expansion Factor, Y. The expansion factor accounts for the expansion of gas flowing through the valve as the pressure reduces from inlet to outlet. The expansion factor is the ratio of flow coefficients for a gas to that for a liquid at the same Reynolds number .

What is the Z factor for natural gas?

The compressibility factor (Z), also known as the compression factor or the gas deviation factor, is a correction factor which describes the deviation of a real gas from ideal gas behavior. It is simply defined as the ratio of the molar volume of a gas to the molar volume of an ideal gas at the same temperature and pressure.

What is the formation resistivity factor?

The concept of formation resistivity factor is one of the most important in petrophysical analysis. It can be described by the expressions just developed. Formation resistivity factor is the ratio of the resistivity of a 100% water saturated rock to the resistivity of the water with which it is saturated.