PVT Empirical Models for Saturated Omani Crude Oils

Boukadi, F.; Bemani, A. S.; Hashmi, A.

doi:10.1081/lft-120002089

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…Some correlations use differential bubblepoint solution GOR (R sDb ) rather than R sFb . Examples include the correlations developed by Borden and Rzasa (1950), Knopp and Ramsey (1960), Vasques and Beggs (1980), Al-Marhoun (1988), Dokla and Osman (1992), Elsharkawy and Alikhan (1997), Almehaideb (1997), Hanafy et al (1997), McCain et al (1998, Velarde et al (1999), Boukadi et al (2002), Gharbi and Elsharkawy (2003) and Mazandarani and Asghari (2007). Others preferred to use flash bubblepoint solution GOR (R sFb ) e.g.…”

Section: Literature Reviewmentioning

confidence: 94%

Prediction of Bubblepoint Pressure and Bubblepoint Oil Formation Volume Factor in the Absence of PVT Analysis

Elmabrouk

Zekri

Shirif

2010

SPE Latin American and Caribbean Petroleum Engineering Conference

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Up till now, there has not been one specific correlation published to directly estimate the bubblepoint pressure in the absence of PVT analysis and, at the moment, there is just one published correlation available to estimate the bubblepoint oil FVF directly in the absence of PVT analysis. The majority of the published bubblepoint pressure and bubblepoint oil FVF correlations cannot be applied directly. This is because the correlations require the knowledge of bubblepoint solution GOR and gas specific gravity as part of the input variables, both of which are rarely measured field parameters. Solution GOR and gas specific gravity can be obtained either experimentally or estimated from correlations. In this study, multiple regression analysis technique is applied in order to develop two novel correlations with which to estimate the bubblepoint pressure and the bubblepoint oil FVF. These new correlations can be applied in a straightforward manner by using direct field data. Additional correlations or experimental analyses are unnecessary. Separator GOR, separator pressure, stock-tank oil gravity and reservoir temperature are the only key parameters required to predict bubblepoint pressure and bubblepoint oil FVF using the proposed correlations. IntroductionReservoir fluid studies are essentially based on pressure-volume-temperature (PVT) analysis. This analysis consists of a series of laboratory procedures designed to provide the values of the reservoir fluid properties required in material balance calculations, well test analysis, reserves estimates, inflow performance calculations, and numerical reservoir simulation. Ideally, reservoir fluid properties are determined from laboratory studies on live oil samples collected from the bottom of the wellbore or from the surface. Standard reservoir PVT fluid studies are designed to simulate the simultaneous fluid flow of oil and gas from the reservoir to the surface. The production path of reservoir fluids from the reservoir to surface is simulated in the laboratory at reservoir temperature. During this process, the bubblepoint pressure (p b ) is measured. Likewise, the oil volumes and the amount of gas released are measured and used to determine oil FVF (B o ) and solution GOR (R s ) as functions of pressure.

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Section: Literature Reviewmentioning

confidence: 94%

Prediction of Bubblepoint Pressure and Bubblepoint Oil Formation Volume Factor in the Absence of PVT Analysis

Elmabrouk

Zekri

Shirif

2010

SPE Latin American and Caribbean Petroleum Engineering Conference

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“…Empirical viscosity correlations in terms of API gravity, 50% boiling point and molecular weight (Shanshool and Hashim, 2001), as well as pressure, temperature, oil-specific gravity, gas-specific gravity, and solution gasoil ratio (Boukadi et al, 2002), have been developed for predicting viscosities at and below the bubble point. Finally, investigations on the viscosities of emulsions and suspensions in the presence of nano-sized solid particles showed that the viscosity of emulsion-solid mixtures is a function of the solid content only.…”

Section: Viscosities Determination Based On Compositionmentioning

confidence: 99%

Hydrocarbon Systems Viscosity Prediction from Fluid Pressures

Ugbe

Ako

Nwalor

2006

Petroleum Science and Technology

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A single correlation for predicting hydrocarbon viscosities in existing and new installations is developed for the range of black oil through gas condensate systems. This semi-empirical, saturation-based correlation with only one adjustable parameter provides great ease of useability. Application of this correlation to several Nigerian crude oil and gas condensate systems is reported with percentage average deviations as low as below 0.5% for crude oil systems. Reported model correlation coefficients are as high as 0.99% for crude oils. Characteristic plots showing a good description of tested systems by the model are reported.

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“…Presently, several correlations exist to obtain the R sob . Examples of these correlations are presented by Standing (1947), Vasques and Beggs (1980), Petrosky and Farshad (1993), Frashad et al (1996), Elsharkawy and Alikhan (1997), Boukadi et al (2002), and most recently, Hemmati and Kharrat (2007), Mazandarani and Asghari (2007) and Khamehchi et al (2009). The basic assumption of R sob correlations as a function of the following variables is:…”

Section: Introductionmentioning

confidence: 96%

Prediction of Bubblepoint Solution Gas/Oil Ratio in the Absence of a PVT Analysis

Elmabrouk¹,

Shirif²

2011

BJPG

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Several published correlations used to estimate the bubblepoint pressure and the bubblepoint oil formation volume factor of reservoir oils require that the value of the bubblepoint solution gas/oil ratio be one of the input variables. Consequently, engineers resort to an additional correlation in order to estimate this value. The majority of the published bubblepoint solution gas/oil ratio correlations are functions of bubblepoint pressure and gas gravity, which can be obtained either experimentally (pressure-volumetemperature, PVT analysis) or estimated from the existing correlations. Thus, it is difficult to apply the correlations in the absence of a PVT analysis. In this study, a multiple regression analysis technique was applied to develop two novel correlations to estimate the bubblepoint solution gas/oil ratio and stocktank vent gas/oil ratio in the absence of a PVT analysis. The developed correlations can be directly applied by using readily available field data, thus, forgoing the requirement of additional correlations or a PVT analysis. The bubblepoint solution gas/oil ratio correlation is related to the separator gas-oil ratio, to the separator pressure, and to the stock-tank oil specific gravity. However, separator pressure and temperature with the stock-tank oil specific gravity were the only independent variables used in stocktank vent gas/oil ratio correlation. Another additional and important application of the proposed stocktank vent gas/oil ratio correlation was to estimate the stock-tank vent gas flow rate.

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PVT Empirical Models for Saturated Omani Crude Oils

Cited by 9 publications

References 7 publications

Prediction of Bubblepoint Pressure and Bubblepoint Oil Formation Volume Factor in the Absence of PVT Analysis

Prediction of Bubblepoint Pressure and Bubblepoint Oil Formation Volume Factor in the Absence of PVT Analysis

Hydrocarbon Systems Viscosity Prediction from Fluid Pressures

Prediction of Bubblepoint Solution Gas/Oil Ratio in the Absence of a PVT Analysis

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