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Numerical Validation of Asphaltene Precipitation and Deposition during CO2 miscible flooding

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petroleum Research 2020年第3期5卷 235-243页

作者： Fahad I.Syed Shahin Neghabhan Arsalan Zolfaghari Amirmasoud K.Dahaghi university of kansas USA ADNOC Offshore UAE

Asphaltene precipitation,flocculation,and deposition can significantly reduce oil production by impacting wellbores,flowlines,and more importantly,formations’pore space around the *** alteration in the temperature,pressure and fluid composition can trigger asphaltene *** ability to predict the occurrence and magnitude of the asphaltene deposition is a major step for flow *** accurate prediction of the deposition envelope enables the operator to systematically categorize different cases based on their impact on the *** critical knowledge can be used to predict the occurrence and magnitude of asphaltene deposition,which could potentially save the expense of installing unnecessary equipment and injecting chemical inhibitors when they are not *** asphaltene-related flow assurance issues requires robust physically-based modeling capabilities for capturing the asphaltene’s deposition tendencies as a function of the prevailing field’s operating *** available simulators are found to be useful for predicting asphaltene’s phase behavior,precipitation tendency,and instability curves,they often overlook important physical characteristics of the *** properties may have a detrimental role in obtaining a realistic representation of the asphaltene deposition *** this paper,the experimental and the numerical investigations are combined to present a comprehensive methodology for studying the thermodynamics of asphaltene precipitation and deposition.A wide range of pressures and CO2 concentrations are covered that are relevant to actual CO2 flooding in a Middle East oil *** do so,a series of lab experiments including routine and special PVT analyses where the Asphaltene Onset Pressure(AOP)and Saturation Pressures(Psat)were measured for different mixtures of CO2 and the reservoir *** of 50 mol%CO2 concentration mixture was tested to measure the AOP and *** amount of asphaltene

关键词： Asphaltene AOP AOC EOS Tuning Asphaltic fluid&CO2 field problems

Molar volume of eutectic solvents as a function of molar composition and temperature

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Chinese Journal of chemical engineering 2016年第12期24卷 1779-1785页

作者： Farouq S.Mjalli petroleum and chemical engineering department Sultan Qaboos University

The conventional Rackett model for predicting liquid molar volume has been modified to cater for the effect of molar composition of the Deep Eutectic Solvents(DES). The experimental molar volume data for a group of commonly used DES has been used for optimizing the improved model. The data involved different molar compositions of each DES. The validation of the new model was performed on another set of DESs. The average relative deviation of the model on the training and validation datasets was approximately 0.1% while the Rackett model gave a relative deviation of more than 1.6%. The modified model deals with variations in DES molar composition and temperature in a more consistent way than the original Rackett model which exhibits monotonic performance degradation as temperature moves away from reference conditions. Having the composition of the DES as a model variable enhances the practical utilization of the predicting model in diverse design and process simulation applications.

关键词： Molar volume Density Physical properties Ionic liquids Eutectic solvents

Effect of particle size on high-pressure methane adsorption of coal

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petroleum Research 2016年第1期1卷 53-58页

作者： Jie Zou Reza Rezaee department of petroleum engineering Curtin UniversityWestern AustraliaAustralia

Adsorbed gas cannot be neglected in the evaluation of coalbed methane and shale gas since a significant proportion of gas is stored in the form of adsorbed *** methane of coal and shale has been widely studied by high-pressure methane adsorption *** sample treatment of the experiment,the sample is crushed and sieved to a particular particle size ***,how particle size influence high-pressure methane adsorption is still *** this study,low-pressure nitrogen(N_(2))and high-pressure methane adsorption have been measured on coal samples with different particle *** to N2 sorption analysis,pore volume and surface area increase with particle size *** size distribution of small pores(10nm)decreases with decreasing particle *** particle size by crushing sample introduces new connectivity for closed pores to the particle *** responses of isotherms of high-pressure methane adsorption are different with different particle *** adsorption at initial pressure(145psi)increases with decreasing particle *** increase rate at high pressure(435-870psi)decreases with particle size *** can be explained that fine sample has more pore volume and higher pore volume proportion of small pores(<10nm).Sample with particle size of 150-250μm has the highest Langmuir volume.

关键词： particle size high-pressure methane adsorption coal shale gas

Development of a microfluidic-chip system based on parallel flow for intensified Gd(Ⅲ)extraction from nitrate media using cationic extractant

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Journal of Rare Earths 2018年第11期36卷 1198-1204页

作者： All Abbasi Ahmad Rahbar-Kelishami Mohammad Javad Ghaserni Research lab for Advanced Separation Processes Department of ChemicalPetroleum and Gas EngineeringIron University of Science&Technology(IUST)Narmak 16846-13114TehranIran

Microfluidic solvent extraction （micro SX） of gadolinium was conducted using a mono- and diester mixture （MDEHPA） as the cationic extractant. A microfluidic Y-Y channel was fabricated using CO2- laser technique in a glass microchip used as the extraction system. Compared with batch extraction, extraction kinetic is found fast, and extraction equilibrium is attained within 15 s. Stoichiometry of the extracted complex is found to be Gd（NOs）3-3MDEHPA using log-log plot method. Additionally, the operating parameters and overall volumetric mass transfer coefficient （kLα） were investigated to determine the mass transfer performance. Optimal condition of microextraction for gadolinium using response surface methodology was determined （feed solutions 31 mg/L adjusted to pH value 2.5, extractant concentration 2.9 vol% and extraction time 13.5 s）. In optimal condition, gadolinium extraction yield is obtained 95.5%. Findings of this study approve simplicity, portability, effectiveness, swiftness, and environmental friendliness microfluidic solvent extraction process and reveal that micro SX is useful in the field of extraction strategic metals present at low concentrations, which are otherwise not technically amenable or economically feasible to extract using current traditional methods.

关键词： Gadolinium Solvent extraction Microfluidics Rare earth element (REE) Liquid phase microextraction CO2 engraving

Kinetic Modeling of Light Naphtha Hydroisomerization in an Industrial Universal Oil Products Penex^(TM)Unit

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Energy engineering 2023年第6期120卷 1371-1386页

作者： Ramzy S.Hamied Zaidoon M.Shakor Anfal H.Sadeiq Adnan A.Abdul Razak Ammar T.Khadim department of petroleum Technology University of TechnologyBaghdadIraq department of chemical engineering University of TechnologyBaghdadIraq Midland Refineries Company Al-Dura RefineryBaghdadIraq

Recently,the isomerization of light naphtha has been increasingly significant in assisting refiners in meeting sternness specifications for *** process provides refiners with the advantage of reducing sulfur,olefin,and benzene in the gasoline basin without significantly victimizing the *** mathematical modeling of a chemical reaction is a critical tool due to it can used to optimize the experimental data to estimate the optimum operating conditions for industrial *** paper describes light naphtha isomerization reactions over a Pt/Al_(2)O_(3)-Cl catalyst at the Al-Dura Oil Refinery(Baghdad,Iraq)using a newly developed universal mathematical *** proposed kinetic model involves 117 isomerization reactions and 90 cracking reactions to describe 52 real components graded from methane to n-octane.A Genetic Algorithm stochastic optimization technique applied in MATLAB R2020a software was employed to estimate the optimal set of kinetic *** calculated activation energies for hydrocracking reactions was found to be higher than the other reactions because of hydrocracking reactions occur at higher range of *** benchmarking between the experimental and theoretical results for all 117 data sets,the mean absolute error was obtained to be 0.00360 for all 52 ***,a positive effect of increasing reaction temperatures was recognized on enhancing the research octane number(RON).

关键词： Light naphtha hydroisomerization reactions kinetics mathematical modelling

Denouements of machine learning and multimodal diagnostic classification of Alzheimer’s disease

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 289-306页

作者： Binny Naik Ashir Mehta Manan Shah department of Computer engineering Indus UniversityAhmedabadGujarat 382115India department of chemical engineering School of TechnologyPandit Deendayal Petroleum UniversityGandhinagarGujarat 382007India

Alzheimer’s disease(AD)is the most common type of *** exact cause and treatment of the disease are still *** neuroimaging modalities,such as magnetic resonance imaging(MRI),positron emission tomography,and single-photon emission computed tomography,have played a significant role in the study of ***,the effective diagnosis of AD,as well as mild cognitive impairment(MCI),has recently drawn large *** technological advancements,such as robots,global positioning system technology,sensors,and machine learning(ML)algorithms,have helped improve the diagnostic process of *** study aimed to determine the influence of implementing different ML classifiers in MRI and analyze the use of support vector machines with various multimodal scans for classifying patients with AD/MCI and healthy *** have been drawn in terms of employing different classifier techniques and presenting the optimal multimodal paradigm for the classification of AD.

关键词： Machine learning Support vector machine Alzheimer

A systematic review on nanotechnology in enhanced oil recovery

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petroleum Research 2021年第3期6卷 204-212页

作者： Himanshu Panchal Hitarth Patel Jash Patel Manan Shah School of petroleum Technology Pandit Deendayal Energy UniversityGandhinagar382426GujaratIndia department of chemical engineering School of TechnologyPandit Deendayal Energy UniversityGandhinagar382426GujaratIndia

Primary objective of the paper is to represent the functionality of nanotechnology in Enhanced Oil Recovery(EOR).Nanoparticles can resist high temperature and pressure in subsurface oil reservoir system and exhibit different properties compared to same fine or bulk *** to small in size,it increases surface area and it creates massive diffusion driving force at higher pressure and *** small surface area,it contains much higher concentration of *** are used to modify optical,specific,thermal,interfacial properties of tight oil reservoir with 5e50 mm size pore diameter which consists trapped oil in *** reveals that by controlling nano mineral complexes can increase recovery of oil in oil field due to capillary hysteresis value change and specific behavior of clay *** boost the oil recovery by mechanism of reduction in mobility ratio which reduces viscosity of heavy oil and interfacial tension and increase in fault lines *** like silane treated silicon oxides,aluminium oxides in brine can be *** have tendency of displacement of water and magnifies flow of oil in *** nanoparticles performance depends upon its operational condition for EOR *** modern oil and gas domain by using EOR technique have oil recovery factor magnitude of 0.3e0.5;but by using nanotechnology there will be growth in oil&gas recovery efficiently and guarantying oil recovery factor range up to 0.5 to *** is not possible to know all application of nanotechnologies;but some experimental results and advanced technologies deduce that there is reduction in cost of hydrocarbon production for its market use by application of nanotechnology in *** advancement in nanotechnologies can increase more recovery of oil&gas.

关键词： Nanotechnology Enhanced oil recovery Interfacial tension Wettability Flooding Viscosity

Artificial intelligence:New age of transformation in petroleum upstream

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petroleum Research 2022年第1期7卷 106-114页

作者： Parth Solanki Dhruv Baldaniya Dhruvikkumar Jogani Bhavesh Chaudhary Manan Shah Ameya Kshirsagar School of petroleum Technology Pandit Deendayal Petroleum UniversityGandhinagar382007GujaratIndia department of chemical engineering School of TechnologyPandit Deendayal Petroleum UniversityGandhinagar382007GujaratIndia department of Information Technology Symbiosis Institute of TechnologyPuneMaharashtraIndia

In the Oil and Gas industry,the implementation of artificial intelligence techniques gives advantages of better use of existing *** provides better future outcomes,which makes it an essential technology in the operations of the *** this paper,the implementation of artificial intelligence techniques for good planning,determination of reservoir rock properties,drilling optimization and production facilities are *** precise knowledge of permeability and porosity,reservoir engineers can develop robust reservoir development plan and manage hydrocarbon recovery *** porosity prediction,wire-line log data and seismic attributes are used in artificial intelligence-based *** prediction has been discussed by considering the different types of well-log data in the modeling of artificial intelligence techniques to predict single-phase *** of specific developed problems during the determination of permeability in the actual experiment is also *** intelligence techniques are used in the design and accurate analysis of the drilling *** assists in the selection of drill bit and drilling-related *** a reservoir cannot produce naturally,we can select a suitable artificial lift and design the production system using Artificial intelligence *** EOR methods,SADA and NAVA knowledge base systems are *** intelligence can help in optimizing production,improve production efficiency and recovery of hydrocarbons.

关键词： Artificial neural network Enhanced oil recovery Fuzzy logic system Artificial lift Permeability Porosity

Kinetics and mechanisms of the catalytic thermal cracking of asphaltenes adsorbed on supported nanoparticles

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petroleum Science 2016年第3期13卷 561-571页

作者： Tatiana Montoya Blanca L.Argel Nashaat N.Nassar Camilo A.Franco Farid B.Cortés department of chemical and petroleum engineering University of Calgary 2500 University Drive NW CalgaryAB Canada Grupo de Investigacion Fenomenos de Superficie-Michael Polanyi Facultad de Minas Universidad Nacional de Colombia Sede Medellin Medellin Colombia Grupo de Investigacion en Yacimientos de Hidrocarburos Facultad de Minas Universidad Nacional de Colombia Sede Medellfn Kra 80 No. 65-223 Medellfn Colombia

The production of heavy and extra-heavy oil is challenging because of the rheological properties that crude oil presents due to its high asphaltene *** upgrading and recovery processes of these unconventional oils are typically water and energy intensive,which makes such processes costly and environmentally *** catalysts could be used to enhance the upgrading and recovery of heavy oil under both in situ and ex situ *** this study,the effect of the Ni-Pd nanocatalysts supported on fumed silica nanoparticles on post-adsorption catalytic thermal cracking of n-C_7 asphaltenes was investigated using a thermogravimetric analyzer coupled with *** performance of catalytic thermal cracking of n-C_7asphaltenes in the presence of NiO and PdO supported on fumed silica nanoparticles was better than on the fumed silica support *** a fixed amount of adsorbed n-C_7asphaltenes（0.2 mg/m～2）,bimetallic nanoparticles showed better catalytic behavior than monometallic nanoparticles,confirming their synergistic *** corrected OzawaFlynn-Wall equation（OFW） was used to estimate the effective activation energies of the catalytic *** mechanism function,kinetic parameters,and transition state thermodynamic functions for the thermal cracking process of n-C_7 asphaltenes in the presence and absence of nanoparticles are investigated.

关键词： Catalytic thermal cracking Adsorption Nanoparticles SHS n-C7 asphaltene