Formation volume factor an overview sciencedirect topics. Almarhoun and others published new correlations for formation volume factors of oil and gas mixtures find, read and cite all the research you need on researchgate. The formation volume factor of a natural gas b g relates the volume of 1 lbmol of gas at reservoir conditions to the volume of the same lbmol of gas at standard conditions, as follows. To my gorgeous wife shanna, and my beautiful children jennifer justin brittany carsen reservoir eng fob 20011029 16. Formation volume factor change in volume from reservoir to surface conditions depends on reservoir temp, pressure and gasoil ratio 1 to 3. Development of new empirical correlation for prediction of. Oil and dissolved gas volume at reservoir conditions divided by oil volume at standard conditions. Photographs of core scaled to average thicknesses are plotted.
Varies widely depending on permeability, oil viscosity, reservoir pressure, etc. Formation volume factor is a measure of the ratio of the volume occupied by a fluid phase at reservoir conditions divided by the volume occupied by the fluid phase at surface conditions. Information from chapter 3 of phase behavior spe monograph whitson and brule pdf of notes availa. A lecture on the formation volume factor of natural gas. Standing correlation for oil formation volume factor, p. Almarhoun 1985 saudi arabian oil the almarhoun correlation contains equations for estimating bubble point pressure, solution gas oil ratio, and oil formation volume factor for saudi arabian oils.
Accurate evaluation of bo is one of prime important as it relates directly to the calculation of the petroleum reserve in the reservoir and oil in place under stocktank conditions. Values for some of these parameters can be obtained from technical figure 1. Depletion drive expansion of oil in the oil zone, segregation drive expansion of gas in the gas zone, and water drive water influx in the water zone. Engineering and manufacturing science and technology, general fire extinction analysis equipment and supplies firefighting equipment mathematical. It is represented in the form of ratio of volume of natural gas present in the reservoir to the volume of same quality of natural gas actually produced when operating an oil or a gas well at standard pressure and temperature conditions.
To determine the relative magnitude of each of these driving mechanisms, the. Gas formation volume factor calculator gas correlations. It has a very significant influence on the oil formation volume factor, the oil viscosity, and the oil compressibility. Development of new empirical correlation for prediction of oil formation volume factor of crude oil for a major part of oil fields of upper assam basin. Drive indexes from the material balance equation the three major driving mechanisms are. Total formation volume factor, bt bt bo bg rsb rs above pb, bt bo. Figure 2 shows a 3d view of original fluid distributions where the gasoil contact is set at 675 ft above the sea level and oilwater contact is set at 73 ft below the sea level. Chapter pa production analysis production analysis of north. The oil formation volume factor fvf relates the volume of oil at stocktank conditions to the volume of oil at elevated pressure and temperature in the reservoir. Estimating the risked shale gas and shale oil inplace. The formation volume factor fvf relates the volume of oil at stock tank conditions to the volume of oil at elevated pressure and temperature in the reservoir.
Calculating the technically recoverable shale gas and shale oil resource. As the pressure is reduced below the initial reservoir pressure p i, the oil volume increases due to the oil expansion. Volume factor applied petroleum reservoir engineering. It is a family of inductive algorithms which executes computerbased mathematical modeling of multiparametric data sets. Gulf professional publishing boston london auckland johannesbourg melbourne new delhi second edition reservoir eng fob 20011029 16. Since most measurements of oil and gas production are made at the surface, and since the fluid flow takes place in the formation, volume factors are needed to convert measured surface volumes to reservoir conditions. Correlation of oil formation volume factor and solution gas.
B oi formation volume factor for oil at initial conditions reservoir bbl barrels stb stock tank barrels from lab data. Up to now, there has not been one specific correlation published to directly estimate the bubblepoint pressure in the absence of pressurevolumetemperature pvt analysis. In this work, a new correlation for estimating oil formation volume factor. The fluid as it exists in a undersaturated oil reservoir is shown in a. Journal of king saud university engineering sciences.
Pdf oil formation volume factor determination through a fused. Each data set contains reservoir temperature, oil gravity, total solution gas oil ratio, average gas gravity, and oil formation volume factor. The oil formation volume factor can be expressed mathematically as. Pressure liquid density oil formation volume factor 1 solution gasoil ratio 2 oil compressibility oil viscosity incremental gas gravity 3 cumulative gas gravity 4 gas z factor gas formation volume factor 5 gas expansion factor 6 calculated gas viscosity oilgas viscosity ratio psia gcm3 reservoir volume stock tank volume scfstb.
It represents the change in volume of the formation water as it moves from reservoir conditions to surface conditions. Photographs of core scaled to average thicknesses are plotted against the 241foothigh north dakota state capitol. The oil formation volume factor, bo, is defined as the ratio of the volume of oil plus the gas in solution at the prevailing reservoir temperature and pressure to the volume of oil at standard conditions. A typical oil formation factor curve, as a function of pressure for an undersaturated crude oil p i p b, is shown in figure 28. Engineering and manufacturing science and technology, general fire extinction analysis equipment and supplies firefighting equipment mathematical optimization. An integrated nonlinear regression and genetic programming approach. Abstract thermallyreduced oil formation volume factor is correlated with solution gasoil ratio from 0 to 3,500 cu ftbbl. New correlation for oil formation volume factor onepetro. New correlation for oil formation volume factor at and below bubble point pressure by omar alfatlawi and dhifaf sadeq. Dec 19, 2014 typical volume factors include the formation volume factor, twophase formation volume factor and gas volume factor. Reservoir fluid properties required for lowpermeability oil. B g volume of 1 lbmol of gas at reservoir conditions, rcf volume of 1lbmol gas at standard conditions, scf this equation is not rendering properly due to an.
Standing correlation for oil formation volume factor, p oil formation volume factor, p pb, bblstb 21 bousatstanding. Each of these five shale gas and shale oil resource assessment steps is further discussed below. Oil viscosity is a measure of the resistance to flow exerted by the oil, and is given in units of centipoises cp. Forecasting oil formation volume factor for api gravity. Oil formation volume factor an overview sciencedirect topics. Except for cases 1 and 2 above and symbols k h and l v, phase, composition, and system subscripts should generally appear first in subscript order. Of the 608 data points, 372 were used to train the ann models, the remaining 118 to cross. Tthe oil potential of he oil potential of tthe bakken. Improved oil formation volume factor bo correlation for. Oil formation volume factor is defined as the ratio of the volume of oil at reservoir insitu conditions to that at stock tank surface conditions.
Standing correlation for oil formation volume factor, p oil formation volume factor, p oil formation volume factor, p oil formation volume factor, p oil formation volume factor, p oil formation volume factor from pte 461 at university of southern california. The gas formation volume factor is used to relate the volume of gas, as measured at reservoir conditions, to the volume of the gas as measured at standard conditions, i. Bg, gas formation volume factor fvf is a useful relationship for relating gas volumes in the reservoir conditions to the produced volume at standard conditions. The reason of the oil formation volume factor being more than 1. Oil fvf values, determined by gaps optimized nn were in good agreement with reality. Reservoir fluid properties required for lowpermeability.
Abstract thermallyreduced oil formation volume factor is correlated with solution gas oil ratio from 0 to 3,500 cu ftbbl. This behavior results in an increase in the oil formation volume factor and will continue until the bubblepoint pressure is reached. Formation volume factor the plots in figure pa2 a through d are of the oil formation volume factor, normally represented as bo. Prediction of oil formation volume factor using an. Pvt oil formation volume factor fvf alternating conditional expectation ace support vector. During the 1980s an application module known as the. Predicting the bubblepoint pressure and formationvolumefactor. Chapter pa production analysis production analysis of. Pvt properties of oil, gas, and water addin for microsoft.
Oct 05, 2017 formation volume factor and dissolved gas oil ratio duration. The oil formation volume factor can be expressed as where b o oil formation from ape ape301 at university of petroleum and energy studies. The network model is able to predict the bubblepoint pressure and the oil formationvolumefactor as a function of the solution gasoil ratio, the gas relative. The oil formation volume factor can be expressed as where b o. The volume of a fluid phase can have a sensitive dependence on. Pdf new correlations for formation volume factors of oil. The muddy channel sand pinches out at the structure top as shown in figure 3 from a bottom view of. Oil formation volume factor an overview sciencedirect. Pressure liquid density oil formation volume factor 1 solution gas oil ratio 2 oil compressibility oil viscosity incremental gas gravity 3 cumulative gas gravity 4 gas z factor gas formation volume factor 5 gas expansion factor 6 calculated gas viscosity oil gas viscosity ratio psia gcm3 reservoir volume stock tank volume. Pvt properties of oil, gas, and water addin for microsoft excel foreword the physical properties of petroleum fluids are required for most petroleum engineering calculations.
Improved oil formation volume factor b o correlation for volatile oil reservoirs. Evaluation of empirical correlations for bubblepoint oil formation volume factor article pdf available in journal of petroleum science and engineering september 1994 with 149 reads. If s g is the gas saturation and b o the oil formation volume factor at. Oil formation volume factor empirical correlations for some. Gas formation volume factor is a dimensionless factor and is represented as bg. Formation volume factor and dissolved gas oil ratio duration. Tthe oil potential of he oil potential of tthe bakken source.
It is represented in the form of ratio of volume of natural gas present in the reservoir to the volume of same quality of natural gas actually produced when operating an oil or a gas well at. Pvt and phase behaviour of petroleum reservoir fluids. Presently, there is just one published correlation available to estimate the bubblepoint oil formation volume factor fvf directly in the absence of pvt analysis. Jun 17, 2015 a lecture on the formation volume factor of natural gas. Forecasting oil formation volume factor for api gravity ranges using artificial neural network concluded that although, the model was developed for specific crude oil and gas system, the idea of using neural network to model behavior of reservoir fluid can be extended to other crude oil and gas systems as a substitute. Api gravity temperature correction online calculator.
Surface conditions are typically stock tank or standard conditions. These writedowns resulted from misinterpretation of standards and guidelines for reserve classification. Oil formation volume factors are almost always greater than 1. Water formation volume factor gas saturated rbstbw bwt, p. Technically recoverable shale oil and shale gas resources. Oil formation volume factor reflects these changes more fundamentally in the coefficient of compressibility of the oil. Most of the published empirical bo correlations utilize the following. Oil formation volume factor is always greater than 1. Oil formation volume factor determination through a fused. Oil formation volume factor pdf download, basic banking terms and concepts pdf download 3d39b66ab9 advcheck to see that the string includes all the characters before and after the slash and no sentence punctuation marks adjover adv vt octarius octavo off officer ohm old only order oriental out outs over ok1 ukei.
Figure 2 shows a 3d view of original fluid distributions where the gas oil contact is set at 675 ft above the sea level and oil water contact is set at 73 ft below the sea level. The produced water formation volume factor fvf, b w, is defined as the volume at reservoir conditions occupied by 1 stock tank barrel stb of formation water plus its dissolved gas. Cthe oil formation volume factor, bo, and solution gasoil ratio rs, as func tions of pressure. Oil compressibility volume changes of oil above the bubble point are very significant in recovering undersaturated oil. Oil formation volume factor empirical correlations for. Defining the prospective area for each shale gas and shale oil formation.
Typical volume factors include the formation volume factor, twophase formation volume factor and gas volume factor. Crossplot for bo new correlation by nonlinear regression for volatile oil samples. Cthe oil formation volume factor, bo, and solution gas oil ratio rs, as func tions of pressure. The prediction of bubblepoint pressure and bubblepoint. The procedures to calculate inplace volumes for oil and gas reservoirs have already been presented by verma and bird 2005 to help with the usgs assessment of the undiscovered. This correlation was made from the differential liberation curves of 159 analyses of saturated eastern venezuelan crudes. The solution gas oil ratio is a significant component of the pvt correlations. Pdf oil formation volume factor fvf is considered as relative change in oil volume between reservoir condition and. Oil formation volume factor, p pb, bblstb 21 bousatstanding. Purchase pvt and phase behaviour of petroleum reservoir fluids, volume 47 1st edition. Correlation of oil formation volume factor and solution. Evaluation of empirical correlations for bubblepoint oil. The oil formation volume factor can be expressed as where.
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