Revision du modele de Kamal et Brigham propose pour l'interpretation d'essais de puits pulsants a regime impulsionnel irregulier
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Plusieurs dispositifs experimentaux de laboratoire simulant les conditions dynamiques et statiques rencontrees au cours du forage sont presentes. Les boues de forages etudiees sont a base d'eau. Leurs performances au cours du forage... more
Plusieurs dispositifs experimentaux de laboratoire simulant les conditions dynamiques et statiques rencontrees au cours du forage sont presentes. Les boues de forages etudiees sont a base d'eau. Leurs performances au cours du forage sont evaluees a partir des mesures rheologiques et de vitesse de corrosion et de l'etude de la filtration dynamique
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Dokla and Osman's data are to limited to obtain an empirical correlation for bubblepoint pressure, and the bubblepoint pressure correlation developed is not reliable to predict the behaviour of UAE crudes
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Oil compressibility plays an important role in reservoir simulation, material balance calculations, design of high-pressure surface-equipment and the interpretation of well test analysis, specifically for systems below the bubble point... more
Oil compressibility plays an important role in reservoir simulation, material balance calculations, design of high-pressure surface-equipment and the interpretation of well test analysis, specifically for systems below the bubble point pressure. Accurate information on the oil fluid compressibility above and below bubble point pressure is very important for reservoir evaluation. The conventional definition of the isothermal oil compressibility below bubble point pressure is being questioned on its scientific merit and challenged against the basic compressibility definition and the general trend of physical behavior of compressibility. This paper presents a new derivation based on the basic compressibility definition to calculate the oil compressibility below bubble point pressure. The experimental data obtained from flash and differential liberation tests is utilized to determine the isothermal oil compressibility values. It is found that the oil and gas compressibilities below orig...
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Oil compressibility above bubble point pressure is important in reservoir simulation, material balance calculations, design of high-pressure surface-equipment and the interpretation of well test analysis. Accurate calculation of oil... more
Oil compressibility above bubble point pressure is important in reservoir simulation, material balance calculations, design of high-pressure surface-equipment and the interpretation of well test analysis. Accurate calculation of oil compressibility is very important for reservoir evaluation. The oil compressibility above bubble point pressure increases with increasing temperature and decreasing pressure, therefore, curves at the same pressure and different temperatures should not cross each other. The conventional method of obtaining oil compressibility is from individual temperature measurement of pressure-volume data of constant composition expansion test. The oil compressibility determination involves pressure-volume function and its derivative at each temperature. This individual estimation with derivative calculation makes oil compressibility evaluation very sensitive to small derivative change that may lead to an invalid and non physical behavior of curve crossing. This paper ...
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... 4. Al-Kaabi, A., and Lee, WJ, "Using Artificial Neural Nets to Identify the Well Test Interpretation Model," SPE Formation Evaluation, Sept. ... Ayoub holds a M.sc degree in Petroleum Engineering from King Fahd... more
... 4. Al-Kaabi, A., and Lee, WJ, "Using Artificial Neural Nets to Identify the Well Test Interpretation Model," SPE Formation Evaluation, Sept. ... Ayoub holds a M.sc degree in Petroleum Engineering from King Fahd University of Petroleum & Minerals (KFUPM-Saudi Arabia) in 2004. ...
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... PETROLEUM SCIENCE ENGINEERING Evaluation of empirical correlations for bubblepoint oil formation volume factor Saud Mohammed A1Fattah a ... Vazquez and Beggs (1980) presented an empirical correlation for predicting the bubblepoint oil... more
... PETROLEUM SCIENCE ENGINEERING Evaluation of empirical correlations for bubblepoint oil formation volume factor Saud Mohammed A1Fattah a ... Vazquez and Beggs (1980) presented an empirical correlation for predicting the bubblepoint oil FVF for saturated crndes. ...
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ABSTRACT Viscosity of crude oil is an important physical property that controls and influences the flow of oil through rock pores and eventually dictating oil recovery. Prediction of crude oil viscosity is one of the major challenges... more
ABSTRACT Viscosity of crude oil is an important physical property that controls and influences the flow of oil through rock pores and eventually dictating oil recovery. Prediction of crude oil viscosity is one of the major challenges faced by petroleum engineers in production planning to optimize reservoir production and maximize ultimate recovery.This paper presents prediction of the complete viscosity curve as a function of pressure using artificial intelligence (AI) techniques. The viscosity curve predicted using artificial intelligence techniques derived from gas compositions of Canadian oil fields closely replicated the experimental viscosity curve above and below bubble point pressure when compared with correlations of its class. Functional Networks with Forward Selection (FNFS) outperformed all the AI techniques followed by Support Vector Machine (SVM).
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... AU Al-Kaabi, H. Menouar, MA Al-Marhoun and H. Al-Hashim, Bottom water drive in tarmat reservoirs, SPE Res. ... M. Ayub, The effects of tar viscosity and thickness on oil recovery in a tarmat reservoir model, MS Thesis, King Fahd... more
... AU Al-Kaabi, H. Menouar, MA Al-Marhoun and H. Al-Hashim, Bottom water drive in tarmat reservoirs, SPE Res. ... M. Ayub, The effects of tar viscosity and thickness on oil recovery in a tarmat reservoir model, MS Thesis, King Fahd University of Petroleum & Minerals, Dhaharan ...
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Drilling fluid property changes due to elevated temperature and aging time cause problems in drilling deep wells. A laboratory investigation of the effect of high temperature ( 490 ˚F), high pressure (10000 psig), and long aging time (10... more
Drilling fluid property changes due to elevated temperature and aging time cause problems in drilling deep wells. A laboratory investigation of the effect of high temperature ( 490 ˚F), high pressure (10000 psig), and long aging time (10 days) on water-base drilling fluid properties is made with Fann Model 70 HTHP Viscometcr and Baroid Roller Oven. The results show a decrease in viscosity, yield point, and gel strength with the increase in temperature. Shear stress for a particular temperature increases with the increase in shear rate, but shear stress at a given shear rate decreases with the temperature rise. The viscosity yield point and gel strength at a given temperature increase with aging time, and aging effects diminish with the increase in aging time. Shear stress at a given shear rate increases with aging time and aging effects decrease with the increase in aging time. Pressure increases the values of the rheological properties of the drilling fluid.
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The oil density at the bubble point is an important thermodynamic property required in reservoir simulation and production engineering. A higher-accuracy estimate of this property would improve the accuracy of reservoir and production... more
The oil density at the bubble point is an important thermodynamic property required in reservoir simulation and production engineering. A higher-accuracy estimate of this property would improve the accuracy of reservoir and production engineering calculations. The bubble point oil density is obtained either from separator tests of reservoir fluids or from differential gas liberation tests. A new procedure utilizing separator and differential tests is proposed whereby the experimental data yield a unique value with high accuracy for the bubble point oil density. A consistent correction of other PVT properties, which are influenced by the bubble point oil density, is required to reflect the unique density value. A quantitative quality control index is defined to measure the quality of PVT laboratory reports. This is achieved by utilizing the unique property of the bubble point oil density, which is usually ignored.
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New Models with three different techniques have been developed to predict the dew-point pressure for gas condensate reservoirs. Traditional correlations, non-parametric approaches and artificial neural networks have been utilized in this... more
New Models with three different techniques have been developed to predict the dew-point pressure for gas condensate reservoirs. Traditional correlations, non-parametric approaches and artificial neural networks have been utilized in this study. The new models are function of easily obtained parameters (reservoir temperature, gas specific gravity, condensate specific gravity and gas-oil ratio). A total number of 113 data sets obtained from Constant Mass Expansion experiment (CME) were collected from Middle East fields; has been used in developing the models. The data used for developing the models covers a reservoir temperature from 100 to 309 oF, gas oil ratios from 3,321 to 103,536 SCF/STB, gas specific gravity from 0.64 to 0.82 and condensate specific gravity from 0.73 to 0.81. The artificial neural network developed in this study has the best results among all other models with an average absolute error of 6.5%. Graphical and statistical tools have been utilized for the sake of comparing the performance of the new models and empirical models available in literature.
ELSEVIER Journal of Petroleum Science and Engineering 16 (1996) 275290 Evaluation of empirically derived PVT properties for Pakistani crude oils Mohammed Aamir Mahmood, Muhammad Ali AlMarhoun '" Department of Petroleum... more
ELSEVIER Journal of Petroleum Science and Engineering 16 (1996) 275290 Evaluation of empirically derived PVT properties for Pakistani crude oils Mohammed Aamir Mahmood, Muhammad Ali AlMarhoun '" Department of Petroleum Engineering, King Fahd University of Petroleum ...
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ABSTRACT As naturally fractured reservoirs present wide ranges of geological characteristics and complex flow mechanisms between matrix and fracture, reservoir simulation is highly necessary to properly evaluate production performance.... more
ABSTRACT As naturally fractured reservoirs present wide ranges of geological characteristics and complex flow mechanisms between matrix and fracture, reservoir simulation is highly necessary to properly evaluate production performance. Pressure maintenance by gas and/or water injection is often required in naturally fractured reservoirs to control production GOR and to extract more oil from matrix rock. We studied by simulation particularly about effects of oil compressibility below bubblepoint pressure on pressure maintenance and production performance. We first developed and validated a 3-phase 3-dimensional dual-porosity model with the streamline method considering dissolved gas, capillary pressure and gravity. The fluid compressibility is a primary parameter that directly affects the reservoir performance. We accounted for compressibility effects with the total compressibility in the 3-D pressure equations, and with the effective density in the 1-D flow equations along streamlines. A flash-calculation algorithm was incorporated to treat the gas and oil phases correctly. The oil and gas compressibility definitions presented by Perrine, that have been being used conventionally, have inherently a physical inconsistency such that oil compressibility below the bubble-point pressure increases with the increase of density, and that the mass of gas phase remains constant with changing pressures. To correct those, new derivation based on the basic compressibility definition was introduced. Simulating peripheral water-injection with and without crestal gas-injection, results of pressure and production performance were compared for the new and conventional compressibility formulation. With the new compressibility, higher degrees of effectiveness were demonstrated in pressure maintenance. Gas injection also showed effectiveness in pressure maintenance, though it caused higher production GOR and a faster rise of water cut.
ABSTRACT As naturally fractured reservoirs present wide ranges of geological characteristics and complex flow mechanisms between matrix and fracture, reservoir simulation is highly necessary to properly evaluate production performance.... more
ABSTRACT As naturally fractured reservoirs present wide ranges of geological characteristics and complex flow mechanisms between matrix and fracture, reservoir simulation is highly necessary to properly evaluate production performance. Pressure maintenance by gas and/or water injection is often required in naturally fractured reservoirs to control production GOR and to extract more oil from matrix rock. We studied by simulation particularly about effects of oil compressibility below bubblepoint pressure on pressure maintenance and production performance. We first developed and validated a 3-phase 3-dimensional dual-porosity model with the streamline method considering dissolved gas, capillary pressure and gravity. The fluid compressibility is a primary parameter that directly affects the reservoir performance. We accounted for compressibility effects with the total compressibility in the 3-D pressure equations, and with the effective density in the 1-D flow equations along streamlines. A flash-calculation algorithm was incorporated to treat the gas and oil phases correctly. The oil and gas compressibility definitions presented by Perrine, that have been being used conventionally, have inherently a physical inconsistency such that oil compressibility below the bubble-point pressure increases with the increase of density, and that the mass of gas phase remains constant with changing pressures. To correct those, new derivation based on the basic compressibility definition was introduced. Simulating peripheral water-injection with and without crestal gas-injection, results of pressure and production performance were compared for the new and conventional compressibility formulation. With the new compressibility, higher degrees of effectiveness were demonstrated in pressure maintenance. Gas injection also showed effectiveness in pressure maintenance, though it caused higher production GOR and a faster rise of water cut.
... AU Al-Kaabi, H. Menouar, MA Al-Marhoun and H. Al-Hashim, Bottom water drive in tarmat reservoirs, SPE Res. ... M. Ayub, The effects of tar viscosity and thickness on oil recovery in a tarmat reservoir model, MS Thesis, King Fahd... more
... AU Al-Kaabi, H. Menouar, MA Al-Marhoun and H. Al-Hashim, Bottom water drive in tarmat reservoirs, SPE Res. ... M. Ayub, The effects of tar viscosity and thickness on oil recovery in a tarmat reservoir model, MS Thesis, King Fahd University of Petroleum & Minerals, Dhaharan ...
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... Abdul Aziz Al-Kaabi,* King Fahd U. of Petroleum and Minerals Habib Menouar, SPE, King Fahd U. of Petroleum and Minerals Muhammad Ali Al ... Four different cases were studied: a square barrier beneath the well, a disk beneath the well,... more
... Abdul Aziz Al-Kaabi,* King Fahd U. of Petroleum and Minerals Habib Menouar, SPE, King Fahd U. of Petroleum and Minerals Muhammad Ali Al ... Four different cases were studied: a square barrier beneath the well, a disk beneath the well, a hollow square or disk beneath the well ...
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Empirical equations for estimating bubblepoint pressure, oil FVF at bubblepoint pressure, and total FVF for Middle East crude oils were derived as a function of reservoir temperature, total surface gas relative density, solution GOR, and... more
Empirical equations for estimating bubblepoint pressure, oil FVF at bubblepoint pressure, and total FVF for Middle East crude oils were derived as a function of reservoir temperature, total surface gas relative density, solution GOR, and stock-tank oil relative density. These empirical equations should be valid for all types of oil and gas mixtures with properties falling within the range of
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... Factor (Bob), which is defined as the volume of reservoir oil that would be occupied by one stock tank barrel oil plus any dissolved gas at the ... Database of 803 published data from the Middle East,Malaysia, and Gulf of Mexico... more
... Factor (Bob), which is defined as the volume of reservoir oil that would be occupied by one stock tank barrel oil plus any dissolved gas at the ... Database of 803 published data from the Middle East,Malaysia, and Gulf of Mexico fields was used to develop the present model. ...
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The compressibility factor (z-factor) of gases is a thermodynamic property used to account for the deviation of real gas behavior from that of an ideal gas. Correlations based on the equation of state are often implicit, because they... more
The compressibility factor (z-factor) of gases is a thermodynamic property used to account for the deviation of real gas behavior from that of an ideal gas. Correlations based on the equation of state are often implicit, because they require iteration and are computationally expensive. A number of explicit correlations have been derived to enhance simplicity; however, no single explicit correlation has been developed for the full range of pseudoreduced temperatures 1.05 <Tpr <3 and pseudo-reduced pressures 0.2 <Ppr <15 , which represents a significant research gap. This work presents a new z-factor correlation that can be expressed in linear form. On the basis of Hall and Yarborough’s implicit correlation, we developed the new correlation from 5346 experimental data points extracted from 5940 data points published in the SPE natural gas reservoir engineering textbook and created a linear z-factor chart for a full range of pseudo-reduced temperatures 1:15 < Tpr<3 and pseudo-reduced pressures 0:2<Ppr <15.