What is volumetric estimation of petroleum?
Volumetric is a method to estimate fluid in reservoir based on volume of pore space in a rock and water saturation. Volume of Oil Initially In Place (OIIP) To estimate oil initially volume in place, the following formula is a volumetric calculation for oil.
How are oil reserves calculated?
To qualify, oil reserves must have the potential of being extracted under current technological constraints. Reserves are calculated based on a proven/probable basis, meaning oil pools situated in unattainable depths, for example, would not be considered part of a nation’s reserves.
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 oil initially in place?
Oil initially in place (OIIP) is the amount of crude oil first estimated to be in a reservoir. Oil initially in place differs from oil reserves, as OIIP refers to the total amount of oil that is potentially in a reservoir and not the amount of oil that can be recovered.
Is STB the same as bbl?
1.2. 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.
What is formation volume factor?
The formation volume factor of gas is defined as the ratio of the volume of gas at the reservoir temperature and pressure to the volume at the standard or surface temperature and pressure (ps and Ts).
What is the volumetric method?
volumetric analysis, any method of quantitative chemical analysis in which the amount of a substance is determined by measuring the volume that it occupies or, in broader usage, the volume of a second substance that combines with the first in known proportions, more correctly called titrimetric analysis (see titration) …
What is initial oil in place?
What Does Oil Initially in Place Mean? Oil initially in place (OIIP) is the amount of crude oil first estimated to be in a reservoir. Oil initially in place differs from oil reserves, as OIIP refers to the total amount of oil that is potentially in a reservoir and not the amount of oil that can be recovered.
How do you calculate gas in place?
5.2: Estimation of Original Gas In-Place, OGIP, Using the Volumetric Method
- Equation 5.01a. or, equivalently (after applying the Saturation Constant): G=Vgrv(¯hn/¯hg)ˉϕ(1−¯Swι)¯Bgι
- Equation 5.01b. Where: G is the original-gas-in-place of the reservoir, SCF.
- Equation 5.02. Where: Vgrv is the gross rock volume, ft.
How do you calculate HCPV?
HCPV = BRV * NTG * PORO * So
- HCPV is the Hydrocarbon Pore Volume in reservoir conditions. This is the volume we are after.
- BRV is the Bulk Rock Volume.
- NTG is the Net-To-Gross.
- PORO is the average Porosity within the part of BRV full of oil.
- So is the average oil saturation within the part of the BRV full of oil.
What is BG in oil and gas?
Bg = gas formation volume factor, ft3/scf. Vp,T = volume of gas at pressure p and temperature, T, ft. 3. Vsc = volume of gas at standard conditions, scf.
How do you calculate volumetric analysis?
Formula Used in Volumetric Analysis
- (1) Strength of solution = Amount of substance in g litre-1
- (3) Strength of solution = Normality × Eq. wt. of the solute.
- = molarity × Mol. wt. of solute.
How do you do volumetric analysis?
- Prepare a solution from an accurately weighed sample to +/- 0.0001 g of the material to be analyzed.
- Choose a substance that will react rapidly and completely with the analyte and prepare a standard solution of this substance.
- Place the standard solution in a buret and add it slowly to the unknown.
What is the volumetric method for reservoir oil content?
One of the simplest methods of calculating reservoir oil content is called the volumetric method. The mathematical expression for the initial oil-in-place (N, in bbl) by this method is: As =surface area of the reservoir, acres h =thickness of the formation, ft ϕ =porosity, fraction
What is the formula for oil formation volume factor?
o(p(t)) = oil formation volume factor at reservoir pressure p, bbl/STB p(t) = reservoir pressure at time t, psia II. Calculating Gas in Place by the Volumetric Method Gas in place by the volumetric method is given by: Where: G(t) = gas in place at time t, SCF V.
How do you calculate oil in place from time t?
I. Calculating Oil in Place by the Volumetric Method Oil in place by the volumetric method is given by: Where: N(t) = oil in place at time t, STB V.
What is the formula to calculate the volume of a reservoir?
b= 7758 A h = bulk reservoir volume, bbl 7758 = bbl/acre-ft A = area, acres h = thickness, ft φ(p(t)) = porosity at reservoir pressure p, fraction S w(t) = water saturation at time t, fraction B o(p(t)) = oil formation volume factor at reservoir pressure p, bbl/STB p(t) = reservoir pressure at time t, psia II.