Correlations Between Main Physical Properties of Crude Oils and Their NMR Relaxation Behavior and New User-Friendly Software for Quick Crude Oil Characterization

The shale oil of the Lucaogou Formation in the Jimusaer Sag of the Junggar Basin was divided into two sweet spots for exploration and development. Crude oil in the upper and lower sweet spots comes from the upper and lower source rocks. After years of exploration, it has been found that the crude oil in the lower sweet spot has worse physical properties than that of the upper sweet spot. In this study, through the physical and geochemical analysis of crude oil in the upper and lower sweet spots, combined with the organic petrological observation of the upper and lower source rocks, the cause of the poor physical properties of the crude oil in the lower sweet spot has been identified. n-Alkanes in the saturated hydrocarbons of crude oil in the upper and lower sweet were complete while odd-to-even predominance was evident, indicating that the poor physical properties of the crude oil are unrelated to biodegradation. In addition, the correlation between the biogenic parameters and the physical properties of crude oil was analyzed, finding that the difference in crude oil is mainly related to the composition of biogenic precursors of upper and lower source rocks. Combined with organic petrological observation, the lower source rock was found to be rich in telalginite (green algae), which is therefore the primary reason for the difference in physical properties. In comparing results from the characteristics of crude oil biomarkers from both the upper and lower sweet spots, crude oils in the upper sweet spot are similar to each other, indicating that the enrichment of crude oil has experienced a certain migration. In contrast, the differences in biomarkers between the crude oils of the lower sweet spot were relatively large and changed regularly with depth, suggesting the self-generated and self-stored characteristics of crude oil enrichment. At the same time, it was found that the crude oil in the lower sweet spot is also affected by the maturity of adjacent source rocks under the condition of a consistent parent material source. Overall, it was determined that the lower the maturity of source rocks, the poorer the physical property of the crude oil produced.

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Accurate prediction of the viscosity of light crude oils using one-parameter friction theory: Effect of crude oil characterization methods and property correlations

Fuel ◽

10.1016/j.fuel.2020.118926 ◽

2021 ◽

Vol 283 ◽

pp. 118926 ◽

Cited By ~ 1

Author(s):

Yash Khemka ◽

Mohammed I.L. Abutaqiya ◽

Caleb J. Sisco ◽

Walter G. Chapman ◽

Francisco M. Vargas

Keyword(s):

Crude Oil ◽

Accurate Prediction ◽

Crude Oils ◽

Characterization Methods ◽

Friction Theory ◽

Oil Characterization ◽

Property Correlations

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An experimentally investigate the effect of physical properties on the production of lubricating materials from crude oils

Al-Kitab Journal for Pure Sciences ◽

10.32441/kjps.03.01.p3 ◽

2019 ◽

Vol 3 (1) ◽

pp. 30-47

Author(s):

Hazim Al-Jewaree ◽

Omar M.Ali

Keyword(s):

Physical Properties ◽

Crude Oil ◽

Vacuum Distillation ◽

Research Effort ◽

Lubricating Oil ◽

Crude Oils ◽

Final Conclusion ◽

Lubricating Oils ◽

Atmospheric Distillation ◽

Oil Derivatives

Abstract One of the most important oil derivatives in our time, which all the world seeks to obtain and produce a lot is lubricating oils, which are used for several important purposes and the most important is to keep the thermal engines from damage or collapse due to the phenomenon of friction of the moving parts mechanically at a high temperatures and pressure is relatively high as well as the wear phenomenon This research effort focuses on a comparative study of five types of mix crude Libyan oils (El-Feel Field, Al Wafa Field, Amina Field, Brega Field and Al-Sedra Field) for produced the lubricated oil experimentally . Test carried out on the production the lubrication oil by measuring the physical properties include: normal boiling point, pour point, specific gravity (Sp. gr.), standard density (API), dynamic viscosity , kinematics viscosity , Acentric factor and Watson factor (K or Kw). It’s found from the practical results of the production the lubricating oil from crude oil for atmospheric distillation of crude oil practically depends on measurement two physical properties very accurately Watson factor first and then the API. The results from the tests showed that, mix crude oil of Amena, El-Sedra and El-Feel fields suitable than others for production the lubricated oil at atmospheric and then use the vacuum distillation columns. Other results observation, that’s two others types are impossible to produce the lubricated oil. Also, the results observed that’s the useful mole percentage of lubricated oil cutoff has range very small from 2 to 17 % for these types of Libyan crude oils, this percentage will be increase when use vacuum distillation with added some additives materials. In addition, practical results have been found that not all the cutoff produced from atmospheric distillation within the range of temperatures between 370 and 550 oC are lubricating oils, but other compounds are oil derivatives suitable for different fuel depending on the chemical structure of these extracts. The final conclusion of this work is that any crude oil with a light Arabic class (has a relative density API less than 38 and a Kw lower than 12.1) is suitable for the production of lubricated oils from the crude oil. Keyword: physical properties of crude oil, lubricated oil, Libyan crude oil

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Application of Nonlinear Parameters Predictive Model Based on LS-SVM in Pipeline of Mixed Transportation

Volume 2: Computer Technology and Bolted Joints ◽

10.1115/pvp2020-21170 ◽

2020 ◽

Author(s):

Xue Li ◽

Lei Shi

Keyword(s):

Prediction Model ◽

Physical Properties ◽

Crude Oil ◽

Raw Materials ◽

Crude Oils ◽

Nonlinear Parameters ◽

Reliability Modeling ◽

Model Based ◽

Sample Data ◽

Mixed Crude

Abstract In order to meet the refinery’s requirements on the properties of raw materials, improve the hydraulic stability of pipeline transporting process, and reduce the energy consumption, it’s necessary to mix up different crude oils transported in pipeline. The traditional method to obtain the physical properties of mixed crude oil, especially the nonlinear parameters such as viscosity and pour point, is experiment test or empirical formula, but the disadvantage is the heavy workload or limited use conditions. In this paper, a nonlinear parameters prediction model based on LS-SVM is put forward for transporting mixed crude oil in pipeline. The modeling method of the nonlinear parameters prediction based on LS-SVM : 1 normalize the different batch sample data; 2 the kernel function of SVM is Gaussian RBF; 3 regress coefficients by genetic algorithm; 4 train parameters and then obtain the nonlinear parameters prediction model. The nonlinear parameters prediction model based on LS-SVM has superiority in aspects of reliability, modeling efficiency, universality and adaptability. It can adapt to the dynamic requirements of refinery on crude oil properties, make full use of the accumulated mixed crude oils’ physical properties and their mixing ratio. The prediction accuracy of non-linear parameters model can be improved continuously. And then, the rationality and efficiency of online mixed transportation in pipeline can be improved effectively.

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Study of the Effect of Crude Oils on the Metallic Corrosion

Advanced Journal of Graduate Research ◽

10.21467/ajgr.5.1.43-54 ◽

2018 ◽

Vol 5 (1) ◽

pp. 43-54

Author(s):

Suresh Aluvihara ◽

Jagath K Premachandra

Keyword(s):

Crude Oil ◽

Sulfur Content ◽

Salt Content ◽

Ferrous Metal ◽

Relative Weight ◽

Oil Refining ◽

Crude Oils ◽

Hardness Tester ◽

Corrosion Rates ◽

Ferrous Metals

Corrosion is a severe matter regarding the most of metal using industries such as the crude oil refining. The formation of the oxides, sulfides or hydroxides on the surface of metal due to the chemical reaction between metals and surrounding is the corrosion that highly depended on the corrosive properties of crude oil as well as the chemical composition of ferrous metals since it was expected to investigate the effect of Murban and Das blend crude oils on the rate of corrosion of seven different ferrous metals which are used in the crude oil refining industry and investigate the change in hardness of metals. The sulfur content, acidity and salt content of each crude oil were determined. A series of similar pieces of seven different types of ferrous metals were immersed in each crude oil separately and their rates of corrosion were determined by using their relative weight loss after 15, 30 and 45 days. The corroded metal surfaces were observed under the microscope. The hardness of each metal piece was tested before the immersion in crude oil and after the corrosion with the aid of Vicker’s hardness tester. The metallic concentrations of each crude oil sample were tested using atomic absorption spectroscopy (AAS). The Das blend crude oil contained higher sulfur content and acidity than Murban crude oil. Carbon steel metal pieces showed the highest corrosion rates whereas the stainless steel metal pieces showed the least corrosion rates in both crude oils since that found significant Fe and Cu concentrations from some of crude oil samples. The mild steel and the Monel showed relatively intermediate corrosion rates compared to the other types of ferrous metal pieces in both crude oils. There was a slight decrease in the initial hardness of all the ferrous metal pieces due to corrosion.

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Evaluation of the Different Compatibility Indices to Model and Predict Oil Colloidal Stability and Its Relation to Crude Oil Desalting

Resources ◽

10.3390/resources10080075 ◽

2021 ◽

Vol 10 (8) ◽

pp. 75

Author(s):

Ivelina K. Shishkova ◽

Dicho S. Stratiev ◽

Mariana P. Tavlieva ◽

Rosen K. Dinkov ◽

Dobromir Yordanov ◽

...

Keyword(s):

Crude Oil ◽

Colloidal Stability ◽

Crude Oils ◽

Oil Blend ◽

Light Medium

Thirty crude oils, belonging to light, medium, heavy, and extra heavy, light sulfur, and high sulfur have been characterized and compatibility indices defined. Nine crude oil compatibility indices have been employed to evaluate the compatibility of crude blends from the thirty individual crude oils. Intercriteria analysis revealed the relations between the different compatibility indices, and the different petroleum properties. Tetra-plot was employed to model crude blend compatibility. The ratio of solubility blending number to insolubility number was found to best describe the desalting efficiency, and therefore could be considered as the compatible index that best models the crude oil blend compatibility. Density of crude oil and the n-heptane dilution test seem to be sufficient to model, and predict the compatibility of crude blends.

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Determination of the vaporization order of crude oils through the chemical analysis of crude oil residues burned on water

Chemosphere ◽

10.1016/j.chemosphere.2021.131563 ◽

2021 ◽

pp. 131563

Author(s):

Laurens van Gelderen ◽

Kristoffer Gulmark Poulsen ◽

Jan H. Christensen ◽

Grunde Jomaas

Keyword(s):

Chemical Analysis ◽

Crude Oil ◽

Crude Oils

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Separation of Methane from Shuttle Tanker Vents Gases by Adsorption on a Polyurethane/Zeolite Membrane

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.733.42 ◽

2017 ◽

Vol 733 ◽

pp. 42-46

Author(s):

Habiba Shehu ◽

Edidiong Okon ◽

Edward Gobina

Keyword(s):

Carbon Dioxide ◽

Physical Properties ◽

Crude Oil ◽

Deep Water ◽

Separation Factor ◽

Gas Permeation ◽

Zeolite Membrane ◽

Alumina Support ◽

Molar Flux

Shuttle tankers are becoming more widely used in deep water installations as a means of transporting crude oil to storage plants and refineries. The emissions of hydrocarbon vapours arise mainly during loading and offloading operations. Experiments have been carried out on the use of polyurethane/zeolite membrane on an alumina support for the separation of methane from carbon dioxide and oxygen. The physical properties of the membrane were investigated by FTIR. Single gas permeation tests with methane, propane, oxygen and carbon dioxide at a temperature of 293 K and pressure ranging from 0.1 to 1.0 x 10-5 Pa were carried out. The molar flux of the gases through the membrane was in the range of 3 x 10-2 to 1 x 10-1 molm-2s-1. The highest separation factor of CH4/CO2 and CH4/O2 and CH4/C3H8 was determined to be 1.7, 1.7 and 1.6 respectively.

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