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Mechanistic simulation of fracture effects on miscible CO_(2)injection

Petroleum Research 2022年第4期7卷 437-447页

作者： Seyed mohammad hossein Hashemi Behnam Sedaee Institute of Petroleum Engineering School of Chemical EngineeringCollege of EngineeringUniversity of TehranIran

Miscible injection of carbon dioxide(CO_(2))into oil reservoirs as an Enhanced Oil Recovery(EOR)method has proved to be highly *** to the volume of the world's recoverable oil resides inside the fractured reservoirs,investigation of the controlling parameters in the efficient injection of miscible CO_(2) is of paramount importance,mainly owing to the intricacies and complexities associated with this *** complexity in fractured reservoirs arises due to the presence of two distinct media for fluid transfer(i.e.,matrix and fracture network)and the corresponding differences in fluid ***,performance of miscible carbon dioxide injection in these reservoirs was investigated through mechanistic simulation model in the form of dual-porosity(DP),and dual porosity-dual permeability(DPP).Moreover,due to limited supply and high injection costs of this gas in its pure form,performance of the miscible CO_(2) injection combined with C_(1),N_(2),and H_(2)S was also surveyed and compared to pure gas injection case.A sensitivity analysis was also performed based on fracture porosity,fracture horizontal and vertical permeability,matrix horizontal permeability,block height shape factor,matrix capillary pressure,and impure injected components in DP and DPP models,showing that matrix horizontal permeability and capillary pressure have the greatest,and porosity has the lowest impact on miscibility performance and oil recovery in these *** the end,after investigating the effect of different injection cases on miscibility performance and oil recovery,it was concluded that the highest oil recovery in miscible gas injection obtained through optimization of a gas composition having the lowest minimum miscibility pressure(MMP)and the lowest density.

关键词： Naturally fractured reservoir Carbon dioxide Miscibility Impurity Simulation

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Wet cyanuric chloride promoted efficient synthesis of amidoalkyl naphthols under solvent-free conditions

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Chinese Chemical Letters 2009年第4期20卷 383-386页

作者： Gholam hossein Mahdavinia mohammad A.Bigdeli Department of Chemistry Islamic Azad University-Marvdasht BranchMarvdashtIran Faculty of Chemistry Tarbiat Moalem University49 Mofateh St.TehranIran

An efficient and direct procedure has been developed for the preparation of amidoalkyl naphthols by a one-pot condensation of aryl aldehydes, 2-naphthol and urea or amides, in the presence of wet-cyanuric chloride （wet-TCT） as a catalyst. The reactions were carried out under solvent-free media. The present methodology offers several advantages such as excellent yields, simple procedure and eco-friendly reaction condition.

关键词： One-pot Cyanuric chloride Catalyst Amidoalkyl naphthol Multicomponent

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A direct probe of the evolutionary history of the primordial universe

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Science China(Physics,Mechanics & Astronomy) 2016年第10期59卷 85-88页

作者： Xingang Chen mohammad hossein Namjoo Yi Wang Institute for Theory and Computation Harvard-Smithsonian Center for Astrophysics Department of Physics The Hong Kong University of Science and Technology

Dear Editors,Direct measurements of the evolution of the scale factor of the universe a（t）have played central roles in *** measuring the relation between the distance and redshift of galaxies,Hubble and Lamaitre[1]discovered the expansion of the universe,providing the first evidence for the Big Bang *** measurements have been done in exquisite precisions in modern days using the type Ia supernovae as standard candles,leading to the discovery of the late time acceleration of the universe[2].

关键词：宇宙学进化史直接探测宇宙大爆炸模型直接测量 Ia型超新星尺度因子现代生活

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A data-mining approach to biomarker identification from protein profiles using discrete stationary wavelet transform

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第11期9卷 863-870页

作者： Hussain MONTAZERY-KORDY mohammad hossein MIRAN-BAYGI mohammad Hassan MORADI Department of Electrical and Computer Engineering Tarbiat Modares University Faculty of Biomedical Engineering Amir Kabir University of Technology

Objective: To develop a new bioinformatic tool based on a data-mining approach for extraction of the most infor- mative proteins that could be used to find the potential biomarkers for the detection of cancer. Methods: Two independent datasets from serum samples of 253 ovarian cancer and 167 breast cancer patients were used. The samples were examined by surface- enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS). The datasets were used to extract the informative proteins using a data-mining method in the discrete stationary wavelet transform domain. As a dimensionality re- duction procedure, the hard thresholding method was applied to reduce the number of wavelet coefficients. Also, a distance measure was used to select the most discriminative coefficients. To find the potential biomarkers using the selected wavelet coefficients, we applied the inverse discrete stationary wavelet transform combined with a two-sided t-test. Results: From the ovarian cancer dataset, a set of five proteins were detected as potential biomarkers that could be used to identify the cancer patients from the healthy cases with accuracy, sensitivity, and specificity of 100%. Also, from the breast cancer dataset, a set of eight proteins were found as the potential biomarkers that could separate the healthy cases from the cancer patients with accuracy of 98.26%, sensitivity of 100%, and specificity of 95.6%. Conclusion: The results have shown that the new bioinformatic tool can be used in combination with the high-throughput proteomic data such as SELDI-TOF MS to find the potential biomarkers with high discriminative power.

关键词： Proteomics Discrete stationary wavelet transform Data mining Feature selection Biomarker Cancer classification

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Insight into selection of appropriate formulation for colloidal gas aphron(CGA)-based drilling fluids

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Petroleum Science 2020年第3期17卷 759-767页

作者： Mohsen Pasdar Ezatallah Kazemzadeh Ehsan Kamari mohammad hossein Ghazanfari mohammad Soleymani Department of Petroleum Engineering Research Institute of Petroleum IndustryTehranIran Department of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Application of light-weight drilling fluids is essential to develop depleted hydrocarbon ***,colloidal gas aphron(CGA)-based fluids have been introduced for such applications due to their ability in controlling fluid *** this work,a comprehensive experimental study was performed to choose the best formulation for CGA fluids by implementing static stability tests,rheological behavior measurements,and bubble size analyses of *** gum polymer and sodium dodecyl benzene sulfonate(SDBS),an anionic surfactant,and cetyl trimethyl ammonium bromide(CTAB),a cationic surfactant,were utilized to prepare *** the range of experiments conducted,the performance of CGA fluids prepared with SDBS was improved by increasing the polymer and surfactant ***,for CTAB,it was improved by an increase in the polymer concentration and a decrease in the surfactant *** formation of white,long hair-like precipitates observed at high levels of CTAB caused CGA fluid to become rapidly ***,it was observed that the size of CGAs was significantly influenced by the polymer and surfactant *** most stable bubbles were formed at 6.86 g/L of polymer *** results of this study provide insights into appropriate formulation for CGA-based fluids which could be potentially applicable in drilling operations.

关键词： Colloidal gas aphrons Dispersion Stability Rheology Bubble size analysis

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Hydrodynamic mechanisms of aggressive collapse events in leading edge cavitation

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Journal of Hydrodynamics 2020年第1期32卷 6-19页

作者： mohammad hossein Arabnejad Ali Amini Mohamed Farhat Rickard EBensow Department of Mechanics and Maritime Sciences Chalmers University of TechnologyGothenburgSweden Laboratory for Hydraulic Machines EPFLLausanneSwitzerland

Transient cavities generated from unsteady leading-edge cavitation may undergo aggressive collapses which are responsible for cavitation *** this paper,we studied the hydrodynamic mechanisms of these events in the leading edge cavitation fonned over a modified NACA0009 hydrofoil using experimental and numerical *** the experimental investigation,high-speed visualization(HSV)and paint test are employed to study the behavior of the cavitating flow at σ=1.25,α=5°,U∞=20 m/*** the numerical part,the same cavitating flow is simulated using an inviscid density-based compressible solver with a barotropic cavitation *** numerical results are first compared with the experimental HSV to show that the simulation is able to reproduce the main features of the cavitating ***,as the compressible solver is capable of capturing the shock wave upon the collapse of cavities,the location of collapse events with high erosion potential are *** location of these collapse events are compared with the paint test results with a qualitatively good *** is clearly observed,in both the experiments and the numerical simulation,that there exists four distinct regions along the hydrofoil with higher risks of erosion:(1)A very narrow strip at the leading edge,(2)an area of accumulated collapses at around 60 percent of the sheet cavity maximum length,(3)an area around the closure line of the sheet cavity with the highest erosion damage,and(4)a wide area close to the trailing edge with dispersed collapse events.A combined analysis of the experimental and numerical results reveals that the small-scale structures generated by secondary shedding are more aggressive than the large-scale cloud cavities(primary shedding).It is also observed that the high risk of cavitation erosion in regions 2 and 3 is mainly due to the collapses of the small cavity structures that are formed around the sheet cavity closure line or the rolling cloud cavity.

关键词： Hydrodynamic mechanisms aggressive collapse events high-speed visualization(HSV) paint test compressible simulation of cavitating flows

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Electrocatalytic oxidation of hydrazine with alizarin red S as a homogenous mediator on the glassy carbon electrode

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Science China Chemistry 2010年第5期53卷 1194-1200页

作者： mohammad Mazloum-Ardakani Roya Mazidi mohammad hossein Mashhadizadeh Parvanah Rahimi mohammad Ali Karimi Department of Chemistry Faculty of ScienceYazd University Department of Chemistry Payam Noor UniversityArdakan Center Department of Chemistry Faculty of ScienceTarbiat Moalem University Department of Chemistry Faculty of SciencePayam Noor UniversitySirjan Center

Electro-catalytic oxidation and detection of hydrazine on a glassy carbon electrode,at pH 6.0,was studied by using alizarin red S as a homogeneous *** overall number of electrons involved in the catalytic oxidation of hydrazine and that involved in the rate-determining step were four and one,*** interfering effect of some cations,anions and organic compounds were *** current for this process varied linearly with the square root of the scan *** kinetic parameters,such as the electron transfer coefficient(α) and catalytic rate constant(k) ,were determined using cyclic voltammetry,linear sweep voltammetry and *** electro-catalytic response was optimized with regards to the pH,scan rate,hydrazine concentration and other variables.

关键词： alizarin red S hydrazine glassy carbon electrode electro-catalytic oxidation voltammetry

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Major Tectonic Lineaments Influencing the Oilfields of the Zagros Fold-Thrust Belt, SW Iran: Insights from Integration of Surface and Subsurface Data

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Journal of Earth Science 2020年第3期31卷 596-610页

作者： mohammad Seraj Ali Faghih hossein Motamedi Bahman Soleimany Department of Earth Sciences、College of Sciences Shiraz UniversityShirazIran Exploration Directorate of the National Iranian Oil Company(NIOC) TehranIran Reaserch Institute of Petroleum Industry(RIPI) TehranIran

The Zagros fold-thrust belt(ZFTB)formed from the progressive collision between the African-Arabian and Eurasian *** study focuses on the major tectonic lineaments concerned with the distribution of oilfields in the southern Dezful Embayment as an extremely rich hydrocarbon province in the ZFTB,SW *** of surface,near-surface and sub-surface data(e.g.,remote sensing,overburden rocks,reservoir and aeromagnetic data)were used for locating major tectonic lineaments in the study *** results show that the southern Dezful Embayment area was influenced by tectonic lineaments oriented in the NW-SE,NE-SW,E-W and N-S trends,which are possible fault indicators corresponding to surface,shallow subsurface and basement *** dominant N-S and E-W tectonic lineaments possibly highlight the stress regime inherited from old structures in the Arabian Shield basement while the NE-SW,NW-SE trends are interpreted as effects of the Zagros ***,these tectonic lineaments influenced both the basement and sedimentary rocks and are used here to divide the belt into several faulted blocks with different structural frameworks.A clear picture of the tectonic trends influencing the Zagros fold-thrust belt oilfields as well as guidance for delineating hydrocarbon reservoirs in the future are presented.

关键词： aeromagnetic data remote sensing tectonic trend hydrocarbon Zagros Iran

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Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

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Acta Metallurgica Sinica(English Letters) 2015年第8期28卷 1002-1007页

作者： mohammad hossein Enayati Fathallah Karimzadeh Soheil Sabooni Majid Jafari Department of Materials Engineering Isfahan University of Technology

In this study, microstructural evolution of Mg–Ni alloy during mechanical alloying（MA） was ***, a thermodynamic approach was utilized to predict the most stable phases formed in Mg–Ni alloy after MA. The phase composition and microstructural properties of Mg–Ni alloy were assessed by X-ray diffractometry, high-resolution field emission scanning electron microscopy and high-resolution transmission electron microscopy. The results showed that ball milling of magnesium and nickel powder mixture for 70 h yields nanostructural Mg2Ni compound with an average grain size of ~20 nm. Thermodynamic calculations revealed that in the composition ranges of 0.0 ／ XMg／ 0.03（at.%）and 0.97 ／ XMg／ 1, there is no driving force for amorphous phase formation. In the composition range of 0.07 ／ XMg／ 0.93, the change of Gibbs free energy for amorphous phase formation was more negative than solid *** for XMg= 0.66（nominal composition of Mg2Ni intermetallic phase）, the change of Gibbs free energy for intermetallic phase was found to be more negative than both amorphous and solid solution phases indicating that Mg2Ni intermetallic compound is the most stable phase, in agreement with the experimental observations.

关键词： Mechanical alloying Nanocrystalline Hydrogen storage material Mg2Ni Thermodynamics

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Impacts of vegetation over bedforms on flow characteristics in gravel-bed rivers

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Journal of Hydrodynamics 2019年第5期31卷 986-998页

作者： hossein Afzalimehr mohammad Reza Maddahi Jueyi Sui Majid Rahimpour Department of Civil Engineering Iran University of Science and TechnologyTehranIran Department of Water Engineering Shahid Bahonar University of KermanKermanIran Environmental Engineering Program University of Northern British ColumbiaCanada

In the present study,among six gravel-bed river reaches,two natural gravel-bed river reaches with approximately similar bedforms and flow conditions have been found,one river reach with vegetation on bedforms and the other without vegetation on *** on field measurements,the impacts of vegetation over bedforms on flow characteristics have been *** velocity,Reynolds stress and turbulence intensity distributions over bedforms with vegetation have been compared with those over gravel bedforms without *** using the quadrant analysis,the dominant events of turbulent flow structures have been assessed for flows over gravel bedforms with vegetation and without *** show that the effect of vegetation enhances the anisotropy in turbulence and generates strong secondary currents,which lead to the occurrence of dip phenomenon at the stoss section and the crest of vegetated *** change of bed roughness from gravel bed to vegetated bed causes a development of a new boundary *** resulted in the different shape of velocity distributions over bedforms with vegetation from those over bedforms without vegetation,which can affect the lives of aquatic *** shear stress at downstream section of gravel bedform without vegetation is much higher than that of vegetated bedform,which shows that the erosion takes place from downstream of vegetated bedforms,while in the bare beds;the deposition is at downstream of *** is found that the presence of vegetation causes a chaotic distribution pattern of Reynolds shear stress,while it has more orderly pattern at the downstream section of gravel bedform without ***,the distribution of turbulence intensity in the lee side of vegetated bedform has a concave shape and in the stoss section,turbulence is generated in ejections and sweeps near the vegetation *** findings are significant to the practice of river ecological restoration.

关键词： Bedform Reynolds shear stress distribution turbulence intensity vegetation velocity profiles

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