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Investigation of trend between porosity and drilling parameters in one of the Iranian undeveloped major gas fields

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Petroleum Research 2023年第1期8卷 63-70页

作者： Abbas Ayatizadeh Tanha Amirhossein Parizad Khalil Shahbazi hassan bagheri Department of Chemical Engineering Tarbiat Modares UniversityTehranIran National Iranian Drilling Company Well Logging DepartmentAhwazIran Petroleum Engineering Department Petroleum University of TechnologyAhwazIran Petroleum Exploration College of Mining EngineeringUniversity of TehranIran

Porosity is one of the main parameters that should be considered when a gas or an oil field is ***,the availability of porosity is crucial in any rock and formation ***,this parameter is not always available and direct measurement is scarce and usually is confined to appraisal phase of a ***,in this study it is aimed to find a relationship in order to estimate porosity in afterward *** data of 5 appraisal wells of an undeveloped gas field has been gathered to perform this *** full set wireline logging data and drilling data were *** data inherit high level of fluctuation which is normal with respect to real direct measured *** smoothed curving was utilized and as a result,the fluctuation was diminished considerably and the feasibility of carrying out the investigation was being established,*** normalize and gather drilling data in a parameter in order to have a better view and investigation,sigmalog method was *** was observed that there is a clear exponential relationship between porosity and drilling data and curve fitting was utilized to conduct a numerical *** curve fitting was established with R^(2)=0.83 and a trustworthy fitting *** results demonstrate the possibility of porosity estimation by using drilling ***,a numerical relationship is given for a specific *** porosity estimation can lead to better analysis of newly drilled rocks and formations leading to more efficient field development strategies.

关键词： Porosity Drilling data Sigmalog D exponent Wireline logging

Simultaneous determination of cysteamine and folic acid in pharmaceutical and biological samples using modified multiwall carbon nanotube paste electrode

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Chinese Chemical Letters 2012年第2期23卷 237-240页

作者： Ali Taherkhani hassan Karimi-Maleh Ali A.Ensafi Hadi Beitollahi Ahmad Hosseini Mohammad A.Khalilzadeh hassan bagheri Department of Physics Takestan Branchlslamic Azad UniversityTakestanlran Department of Chemistry Majlesi BranchIslamic Azad UniversityIsfahanIran Environment Department Research Institute of Environmental SciencesInternational Center for ScienceHigh Technology and Environmental SciencesKermanIran Department of Chemistry Qaemshahr BranchIslamic Azad UniversityQaemshahrlran Department of Chemistry Takestan Branchlslamic Azad UniversityTakestanlran

A carbon paste electrode（CPE） chemically modified with multiwall carbon nanotubes and ferrocene（FC） was used as a selective electrochemical sensor for the simultaneous determination of trace amounts of cysteamine（CA） and folic acid（FA）.This modified electrode showed very efficient electrocatalytic activity for the anodic oxidation of *** peak current of differential pulse voltammograms of CA and FA increased linearly with their concentration in the ranges of 0.7-200μmol/L CA and 5.0- 700μmol/L *** detection limits for CA and FA were 0.3μmol/L and 2.0μmoI/L,*** diffusion coefficient（D） and transfer coefficient（α） of CA were also *** conditions are sufficient to allow determination of CA and FA both individually and simultaneously.

关键词： Cysteamine Folic acid Carbon nanotube paste electrode Voltammetry

Investigation of quality factor frequency content in vertical seismic profile for gas reservoirs

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Petroleum Research 2021年第1期6卷 57-65页

作者： Ehsan Larki Abbas Ayatizadeh Tanha Amirhossein Parizad Bahram Soltani Soulgani Dr hassan bagheri National Iranian Drilling Company Well Logging DepartmentAhwazIran Petroleum University of Technology Ahwaz Faculty of Petroleum EngineeringAhwazIran Sahand University of Technology Petroleum Exploration EngineeringTabrizIran Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AhwazIran

Since long ago, indirect study of the underground layers properties has been interesting to *** method for this study was seismography which gained great interest besides other tools due to thedifferent identity of waves and energy attraction phenomena in different layers. Vertical seismic profiling(VSP) is considered as a valuable method in oil and gas exploration. This method is used to estimate therock properties in a well. In seismic operations elastic waves are sent down to the underground. Part ofthe waves’ energy is reflected after passing through the earth layers and are received by receivers on theground level. The received data determine the situation of the underneath layers after being processed,and one of the most important applications of seismic data is in the oil and gas exploration field. Qualityfactor is one of the most important seismic detectors that shows itself apparently in VSP data results. Themost substantial purpose of this study is to investigate the frequency content of the quality factor.

关键词： Vertical seismic profiling(VSP) Sonic log Seismic waves Quality factor Rock properties Gas reservoir

Optimization of Wigley Hull Form in order to Ensure the Objective Functions of the Seakeeping Performance

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Journal of Marine Science and Application 2014年第4期13卷 422-429页

作者： hassan bagheri hassan Ghassemi Department of Ocean Engineering Amirkabir University of Technology (A UT) Tehran 15875-4413 Iran

The research performed in this paper was carried out to investigate the computational procedure to design seakeeping optimized ship hull form. To reach the optimized hull form, four stages should be done, which consists of： generate alternative hull form, seakeeping calculations, objective functions and optimization techniques. There are many parameters that may be determined in ship hull form optimization. This paper deals with developed strip theory for determining the seakeeping performance, genetic algorithm （GA） as optimization method, high order equations for curve fitting of the hull form and finally reaching to the minimum bow vertical motion in regular head waves. The Wigley hull is selected as an initial hull and carried to be optimized. Two cases are considered. For the first case, the only form coefficients of the hull （CB, CM, Cw, Cp） are changed and main dimensions （L, B, 7） are fixed. In the second case both hull form and main dimensions are varied simultaneously. Finally, optimized hull form and its seakeeping performances are presented. The results of optimization procedure demonstrate that the optimized hull forms yield a reduction in vertical motion and acceleration.

关键词： optimization genetic algorithm (GA) Wigley hull hullform seakeeping

Cryptanalysis of DBST, a lightweight block cipher

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Frontiers of Computer Science 2024年第4期18卷 219-221页

作者： Sadegh SADEGHI Nasour bagheri Department of Mathematics Institute for Advanced Studies in Basic Sciences(IASBS)Zanjan 45137-66731Iran Research Center for Basic Sciences and Modern Technologies(RBST) Institute for Advanced Studies in Basic Sciences(IASBS)Zanjan 45137-66731Iran Electrical Engineering Department Shahid Rajaee Teacher Training UniversityTehran 16788-15811Iran School of Computer Science(SCS) Institute for Research in Fundamental Sciences(IPM)Tehran 19395-5531Iran

1 Introduction Conventional cryptographic primitives are not suitable for resource-constrained ***,numerous lightweight primitives have been proposed over the past decade,specifically tailored for such ***,such ciphers would not be used in a real-world application unless they were thoroughly tested for security against existing *** this direction,DBST[1]cipher has been recently proposed by Yan et *** balance security,cost,and efficiency,DBST has implemented a novel 4-branch generalized Feistel variant *** this structure,a 2-branch XOR operation has been incorporated in the middle section,establishing interconnections between all *** the other hand,by leveraging the bit-slice technique and subkeys,the algorithm introduces an innovative approach to constructing a dynamic S-box *** designers of DBST cipher have extensively investigated its resistance to known attacks such as linear and differential cryptanalysis,as well as impossible differential cryptanalysis,among *** them,the objective of differential cryptanalysis[2]is to identify high-probability characteristics in the plaintext that are transmitted to the ciphertext,known as distinguishers.

关键词： structure. primitive branch

Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface

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Theoretical & Applied Mechanics Letters 2024年第2期14卷 106-117页

作者： Amin bagheri Kazem Esmailpour Morteza Heydari Renewable Energy Research Center Damavand BranchIslamic Azad UniversityDamavandIran

This research comprehensively investigates the flow and thermal characteristics of a pulsating impinging jet over a dimpled *** analyzes the impact of key parameters(e.g.,inlet velocity pulsation functions,pulsation frequency,amplitude,dimple pitch,dimple depth,Reynolds number)on flow patterns and heat *** computational fluid dynamics and the Re-normalization group turbulence model are employed to accurately simulate complex turbulent flow *** and average heat transfer coefficients are calculated and compared to steady impingement cases,revealing the potential benefits of pulsation for heat transfer *** study also examines how pulsation-induced flow modulation and thermal mixing affect heat transfer *** indicate that combining fluctuating flow with a dimpled surface can improve heat transfer *** summary,increasing pulsation amplitude consistently enhances heat transfer,while the effect of frequency varies between impinging and wall jet zones.

关键词： Pulsating impinging jet Dimpled surface Heat transfer enhancement Pulsation frequency and amplitude Coherent structures

The nature and movement of thrusts in the eastern Iranian orogen:Sechengi Area on the northern border of Lut and Sistan

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Journal of Mountain Science 2024年第9期21卷 3157-3171页

作者： Shahriar KESHTGAR Mahmoud Reza HEYHAT Sasan bagheri Ebrahim GHOLAMI Seyed Naser RAISOSSADAT Department of Geology Faculty of ScienceUniversity of BirjandBirjand ***Iran Department of Geology Faculty of ScienceUniversity of Sistan and BaluchestanZahedan 98167-45845Iran

The eastern Iranian range,known as the Sistan suture zone in the past,has recently been identified as the Sistan *** Paleogene orogeny is located between the Lut and Afghan *** structural analysis shows that most of the thrusts dip towards the NW so that the Permo-Triassic sediments and Jurassic micro-diorites of the Lut Block overthrusted over the younger *** studies show that the tectonic vergence was from the NW to the SE of the Sechengi area in the NW part of Sistan *** recognized three deformation phases in eastern *** first N-S deformation event(D1)resulted in the formation of tight E-W folds(F1)and associated cleavages(S1).The second E-W deformation event(D2),which occurred in the late Paleogene led to the bending of older structures,including the axial plane of the first-generation folds giving them a new northwest direction(F2).Additionally,the ramp of the first-phase thrusts(striking E-W)was reactivated,acquiring a new NNW orientation and exhibiting SSE tectonic *** third deformation event(D3)resulted in the formation of NNE and WNW conjugate faults in eastern *** consecutive deformation events perpendicular to each other are inconsistent with the models of simple linear orogen presented for eastern Iran(*** of eastern Iran continental crust and subsequence linear collision)and seem more consistent with the buckling orogeny(Orocline).

关键词： Thrust Tectonic vergence Orocline Buckling Sechengi Eastern Iranian ranges.

孔隙度对具有不均匀横截面的功能分级多孔梁的自由振动和屈曲行为的影响

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Journal of Central South University 2024年第3期31卷 841-857页

作者： Zeinab bagheri Alireza FIOUZ Mahmood SERAJI Department of Civil Engineering Bushehr BranchIslamic Azad UniversityBushehr ***Iran

本文旨在研究孔隙度对具有不均匀横截面的功能分级多孔梁的自由振动和屈曲行为的影响。一般认为材料的性能沿厚度方向变化,而梁的横截面沿其长度方向分布不均匀。三种不同的孔隙度分布包括对称分布、非对称分布和均匀分布。利用经典的... 详细信息

本文旨在研究孔隙度对具有不均匀横截面的功能分级多孔梁的自由振动和屈曲行为的影响。一般认为材料的性能沿厚度方向变化,而梁的横截面沿其长度方向分布不均匀。三种不同的孔隙度分布包括对称分布、非对称分布和均匀分布。利用经典的梁理论和Hamilton原理推导出了问题的控制方程,并用微分求积法推导出公式。通过已知方法和分析解法对所得结果进行了验证。通过网格独立性研究,确定了最优离散化设置。利用详细的参数化分析研究了不同力学参数,包括孔隙率系数、长径比和变化截面对基频和临界屈曲载荷的影响。结果表明,材料孔隙率的增加会导致梁的屈曲能力显著降低。然而,梁的自由振动行为完全取决于其孔隙度模式。此外,孔隙呈对称分布的梁其屈曲能力和基频性能最好。

关键词：孔隙度功能分级多孔梁自由振动屈曲不均匀截面微分求积法

PCL/HA静电纺丝纤维涂层对可降解Mg/HA复合材料的表面改性:力学性能、腐蚀和生物相容性

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Transactions of Nonferrous Metals Society of China 2024年第5期34卷 1470-1486页

作者： M.SHAMSI M.SEDIGHI A.bagheri School of Mechanical Engineering Iran University of Science and TechnologyTehranIran

采用搅拌铸造和挤压法制备Mg/HA复合材料,并在其表面采用静电纺丝法涂覆聚己内酯/羟基磷灰石(PCL/HA)纤维(2.5%和5%HA,质量分数),以提高其耐腐蚀性。力学性能测试结果表明,复合材料的压缩屈服强度从73MPa(纯镁)提高到151MPa,提高了107%... 详细信息

采用搅拌铸造和挤压法制备Mg/HA复合材料,并在其表面采用静电纺丝法涂覆聚己内酯/羟基磷灰石(PCL/HA)纤维(2.5%和5%HA,质量分数),以提高其耐腐蚀性。力学性能测试结果表明,复合材料的压缩屈服强度从73MPa(纯镁)提高到151MPa,提高了107%。SEM、EDS和XRD分析表明,HA颗粒分布在多孔涂层中。极化曲线结果表明,涂层试样的耐腐蚀性能均优于未涂覆试样。PCL涂层使样品的腐蚀电流密度降低了两个数量级。通过极化和体外腐蚀试验证明了HA在涂层中的有效性。涂层和随后形成的Ca-P层阻碍了模拟体液与基体的接触和渗透,从而起到保护表面的作用。PCL/2.5%HA涂层样品的腐蚀速率最低,其平均值为0.98mm/a,与未涂层样品相比,在14天内减少了81%。根据3天MTT结果,使用PCL/2.5%HA涂层可使细胞活性从43%提高到121%。综上,涂覆PCL/2.5%HA纤维的Mg/HA复合材料在生物可吸收植入物方面具有广阔的应用前景。

关键词：镁基复合材料复合涂层生物可降解羟基磷灰石聚己内酯纤维

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