Determination of Minimum Miscibility Pressure Using Vanishing Interfacial Tension in Support of Alaska North Slope Heavy Oil Development PDF Download
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Author: Vinit Santosh Tathed
Publisher:
ISBN:
Category : Enhanced oil recovery
Languages : en
Pages : 194
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Book Description
"Developing Alaskan heavy oils resources has become necessary as, the production from light oil fields in Alaska's North Slope (ANS) is on the decline. Due to the extremely viscous nature of these heavy oils, they are hard to produce by natural pressure. Miscible gas injection Enhanced Oil Recovery (EOR) can be one of the methods for production of these heavy oils. Minimum miscibility pressure (MMP) is an important optimization parameter for EOR processes involving CO2 or hydrocarbon gas injection. The MMP for a gas-oil system is directly related to the interfacial tension between the injected gas and the reservoir crude oil. In this study, a new technique called Vanishing Interfacial Tension (VIT) was used to measure MMP at reservoir conditions. Experiments were conducted using various gas-oil systems to determine the MMP. The experimental results were modeled using the Peng-Robinson Equation-of-State (EOS) with a commercial simulator (CMG). The Peng-Robinson EOS was tuned with experimental data to predict the MMP accurately. This study has demonstrated the accuracy of the VIT technique in predicting MMP by pendant drop method experiments and simulations using CMG software."--Leaf iii.
Author: Vinit Santosh Tathed
Publisher:
ISBN:
Category : Enhanced oil recovery
Languages : en
Pages : 194
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Book Description
"Developing Alaskan heavy oils resources has become necessary as, the production from light oil fields in Alaska's North Slope (ANS) is on the decline. Due to the extremely viscous nature of these heavy oils, they are hard to produce by natural pressure. Miscible gas injection Enhanced Oil Recovery (EOR) can be one of the methods for production of these heavy oils. Minimum miscibility pressure (MMP) is an important optimization parameter for EOR processes involving CO2 or hydrocarbon gas injection. The MMP for a gas-oil system is directly related to the interfacial tension between the injected gas and the reservoir crude oil. In this study, a new technique called Vanishing Interfacial Tension (VIT) was used to measure MMP at reservoir conditions. Experiments were conducted using various gas-oil systems to determine the MMP. The experimental results were modeled using the Peng-Robinson Equation-of-State (EOS) with a commercial simulator (CMG). The Peng-Robinson EOS was tuned with experimental data to predict the MMP accurately. This study has demonstrated the accuracy of the VIT technique in predicting MMP by pendant drop method experiments and simulations using CMG software."--Leaf iii.
Author: Dr. Eng. Muslim
Publisher: UIR PRESS
ISBN: 6236598010
Category : Technology & Engineering
Languages : en
Pages : 75
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Book Description
The book of “Fundamentals of Minimum Miscibility Pressure Determination Methods” provides a practical reference source for knowledge regarding minimum miscibility pressure (MMP) methods. This book contains some methods to determine minimum miscibility pressure based on literature review that may be used for the better understanding to industries, researchers, students, and many more. In other hand, the book results valuable information for lesson-learn, planning, execution, and monitoring the CO2 projects in the near future. Chapter I serves as an introduction to the subject. Chapter II is more specialized describing some of the methods to determining minimum miscibility pressure. Chapter III describes about advantages and disadvantages of the methods. Suggestions of many readers were evaluated in preparing this book. Any further comment and suggestion for improvement of the book will be gratefully appreciated. Please feel free to contact us directly.
Author: Kaiqiang Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
In this study, several qualitative and quantitative technical criteria are examined/developed and applied to determine the minimum miscibility pressures (MMPs) of different light crude oilCO2 systems from four experimental methods, i.e., the slim-tube tests, coreflood tests, rising-bubble apparatus (RBA), and vanishing interfacial tension (VIT) technique. First, five slim-tube tests with the live light crude oilCO2 system and five coreflood tests with the dead light crude oilCO2 system are conducted at different injection pressures and the actual reservoir temperature of Tres = 53.0C. It is found that different MMPs can be obtained from the same measured oil recovery factor (ORF) vs. injection pressure data if different MMP criteria, regression methods, and threshold values or intersection options are adopted. Thus the determined MMP is better given in a small pressure range than specified as a definitive pressure value. By means of the ORF and break-over pressure (BOP) criteria, two MMP ranges of the live and dead light crude oilCO2 systems are determined to be 15.215.4 MPa from the slim-tube tests and 12.412.9 MPa from the coreflood tests at Tres = 53.0C, respectively. Second, two separate series of pure and impure CO2-bubble tests in a light crude oil column with the RBA are conducted at six different test pressures and Tres = 53.0C. The MMPs of the light crude oilpure and impure CO2 systems are estimated and compared by using four existing (i.e., the bubble shape, size, colour, and rising height) and new bubble break-up (BBU) qualitative criteria with the RBA. It is found that the BBU criterion is consistent with the four existing qualitative criteria for estimating the MMPs. Furthermore, by means of newly developed bubble-rising height (BRH) and bubble-rising velocity (BRV) quantitative criteria, two respective MMP ranges of the light crude oil-pure and impure CO2 systems are found to be 11.7-12.4 MPa and 23.4-23.5 MPa at Tres = 53.0C. Third, six series of the dynamic interfacial tension (IFT) tests for the dead and live light crude oilCO2 systems are conducted under different test conditions. Two new linear correlation coefficient (LCC) and critical interfacial thickness (CIT) technical criteria are developed to determine the MMP when the LCC is smaller than 0.990 or the interfacial thickness is smaller than 1.0 nm for the first time. The determined MMPs of 12.9 MPa and 13.2 MPa for the dead and live light crude oilCO2 systems from the VIT technique by using the two new criteria agree well with 12.412.9 MPa for the former system from the coreflood tests but poorly with 15.215.4 MPa for the latter system from the slim-tube tests. In addition, the specific effects of three important experimental factors on the determined MMPs are studied by using the two new technical criteria: the initial vs. equilibrium IFTs, oil composition, and initial gasoil ratio (GOR) in volume. It is found that the measured initial rather than equilibrium IFTs are accurate enough to determine the MMP from the VIT technique. The live light crude oil pre-saturated with CH4-dominated hydrocarbons has a slightly increased MMP, in comparison with the dead light crude oil. Moreover, the initial GOR effect on the MMP is found to be negligible in a lower GOR range (1:110:1 in volume) or in a large CO2 concentration range (31.7694.69 mol.%). It becomes pronounced in a higher GOR range (200:14000:1 in volume) or in an extremely small range of high CO2 concentrations (98.7999.99 mol.%).
Author: Dayanand Saini
Publisher: Springer
ISBN: 3319955462
Category : Technology & Engineering
Languages : en
Pages : 115
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Book Description
This SpringerBrief critically examines the latest experimental and non-experimental approaches used for the fast and reliable characterization and determination of CO2-reservoir oil miscibility in terms of the minimum miscibility pressure (MMP). This book serves as a one-stop source for developing an enhanced understanding of these available methods, and specifically documents, analyses, and evaluates their suitability and robustness for depicting and characterizing the phenomenon of CO2-reservoir oil miscibility in a fast and cost-effective manner. Such information can greatly assist a project team in selecting an appropriate MMP determination method as per the project’s need at a given project’s stage, be that screening, design, or implementation. CO2-Reservoir Oil Miscibility: Experiential and Non-Experimental Characterization and Determination Approaches will be of interest to petroleum science and engineering professionals, researchers, and undergraduate and graduate students engaged in CO2 enhanced oil recovery (EOR) and/or simultaneous CO2-EOR and storage projects and related research. It may also be of interest to engineering and management professionals within the petroleum industry who have responsibility for implementing CO2-EOR projects.
Author: Tyson M. Affleck
Publisher:
ISBN:
Category : Miscible displacement (Petroleum engineering)
Languages : en
Pages : 150
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Book Description
Miscible carbon dioxide flooding is an effective EOR technique for the displacement of reservoir oil after primary and secondary oil recovery methods have been exhausted. Miscibility is achieved either through a first-contact or multi-contact process. The dynamic multi-contact process involves exchange of components between oil and solvent gas through vaporizing and/or condensing drives ultimately resulting in lower interfacial tension and oil viscosity thereby improving oil displacement. By definition the minimum miscibility pressure (MMP) is the pressure at which miscibility is achieved; operating below MMP will drastically reduce hydrocarbon recovery while operating above MMP will add additional costs to the project with little or no additional recover. The main focus of this study is to design and implement a Rising Bubble Apparatus (RBA) for system MMP identification. The various scenarios to be tested include dead Oil C-pure CO2, live Oil C-impure CO2, and dead Oil C-impure CO2. Vanishing interfacial tension (VIT) results are also analyzed and compared to RBA results; recommendation can then be made to identify the most consistent and accurate method of MMP estimation. When applying the VIT method, the MMP's for the three cases were determined to be 10.7 MPa for the dead Oil C-pure CO2 system, 12.3 MPa for the live Oil C-impure CO2 system, and 21.2 MPa for the dead Oil C-impure CO2 system. When applying the RBA method, the MMP's were determined to be 12.0 MPa for the dead Oil C-pure CO2, 12.5 MPa for the live Oil C-impure CO2 system, and 25.0 MPa for the dead Oil C-impure CO2 system. The two methods yield similar results, however values of MMP from RBA experiments tend to be slightly higher.
Author: Stephen Gekwu Udeagbara
Publisher: Universal-Publishers
ISBN: 1599423553
Category : Surface chemistry
Languages : en
Pages : 125
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Book Description
Surface tension is one of the major issues encountered in the oil industry. This study investigated the laboratory effect of temperature and impurities on surface tension of crude oil samples and water. The aforementioned tests were carried out (in line with industrial standard) on the samples in order to determine the relationship between surface tension, temperature and impurities and also to compare the variation in the measured property due to temperature and impurities. Prediction equations were also built. The results show that surface tension decreases with an increase in temperature in the crude oil samples, water and detergent, while there was an increment in the presence of salt and bentonite as the concentrations increase. We also observed that surface tension increases with water-in-oil emulsion. Also, we see a strong relationship between temperature, impurities and the measured property (surface tension) with an r2 value range of 0.7441 to 0.8638 in all the tests carried out. This study utilized graphic and statistical illustrations to highlight the effect of temperature and impurities on the investigated property and the corresponding effect in the oil industry. The collective and individual relationship between the independent and dependent variable was highlighted and variations were scientifically explained. The prediction equations serve as a quick guide to reservoir engineers to determine the variation in the measured property from other samples of crude oil and water.
Author: Kaustubh D. Alurkar
Publisher:
ISBN:
Category : Enhanced oil recovery
Languages : en
Pages : 224
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Book Description
"Declining light oil production on Alaska North Slope (ANS) has attracted oil producers to develop viscous oil resources of ANS that range between 20 to 25 billion barrels. These oils are viscous, flow sluggishly in the formations, and are difficult to transport through unconsolidated formations and are hard to produce by conventional methods. Viscous oil recovery entails neatly designed enhanced oil recovery processes and the success of these processes is critically dependent on accurate knowledge of phase behavior and fluid properties of these oils under variety of pressure and temperature conditions. An experimental study was conducted to quantify the phase behavior and physical properties of viscous oils from ANS. The oil samples were compositionally characterized by simulated distillation technique, constant composition expansion and differential liberation tests were conducted on these samples. Experimentally studied phase behavior and reservoir fluid properties were modeled by using the Peng-Robinson Equation-of-State (EOS). The Peng-Robinson EOS was tuned with experimental data to predict the phase behavior, accurately. Widely used corresponding state viscosity model predictions deteriorate when applied to heavy oil systems due to use of ultra-light methane as a reference compound. Therefore, a semi empirical approach (Lindeloff model) was adopted for modeling the viscosity behavior. Viscosity behavior of degassed ANS viscous oils was correlated to their temperature and molecular weight. Integration of this correlation into the Lindeloff model resulted in accurate viscosity predictions for viscous oils under reservoir conditions"--Leaf iii.
Author: Vijay Balwant Kulkarni
Publisher:
ISBN:
Category : Oil reservoir engineering
Languages : en
Pages : 176
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Book Description
"An experimental study was conducted to quantify the phase behavior and physical properties of Alaskan North Slope stock tank and live crude oils. Measurement of molecular weight, gas-oil ratio, and constant composition expansion and differential liberation tests were conducted on these samples. Phase behavior and reservoir fluid properties of the live oil samples were modeled using the Peng-Robinson Equation-of-State (EOS). The Peng-Robinson EOS was tuned with experimental data to predict the phase behavior accurately. The results of the modeling yielded a satisfactory match with measured saturation pressure and solution gas-oil ratio. This tuned EOS can be incorporated into the compositional reservoir simulator for field scale simulations of Alaska North Slope. The phase envelope obtained from this tuned PR-EOS when combined with wax phase envelope can help to design the production PT pathway. The measured gas-oil ratio of the bottomhole samples was compared to the crude oil composition and showed that higher the composition of C5-C10 in crude oil, greater is the gas-oil ratio"--Leaf iii.
Author: Maruti S. Inaganti
Publisher:
ISBN:
Category : Miscible displacement (Petroleum engineering)
Languages : en
Pages : 278
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Book Description
Author: Waqar Ahmad Butt
Publisher:
ISBN:
Category : Miscible displacement (Petroleum engineering)
Languages : en
Pages :
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