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Search Results: 1 - 10 of 29268 matches for " Mohammad Ali Riahi "
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Investigation of Petrophysical Parameters of Kangan Reservoir Formation in One of the Iran South Hydrocarbon Fields  [PDF]
Mostafa Kiakojury, Seyed Jamal Sheikh Zakariaei, Mohammad Ali Riahi
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.31004
Abstract: This article studies the properties of k4 Kangan reservoir Formation zone in one of hydrocarbon fields in south of Iran. To do this, some petrophysical parameters such as porosity and permeability in sedimentary facies, porosities and diagenesis of k4 Kangan Formation were measured and the quality of k4 Kangan Formation is studied through analyzing petrophysical data. This study investigates the role of sedimentary facies, types of porosity and controlling diagenetic evolution on k9 Kangan reservoir Formation in one of hydrocarbon fields of south of Iran. In this study, macroscopic and microscopic studies are done on thin sections of Kangan Formation (k4) and the facies and sedimentary environment affecting reservoir formation in two wells of South Pars field. In order to study the microscopy of 166 thin sections, two wells (2 × 3) are used from core of the South Pars. Using polarized microscopy, allochems, the major complications of diagenesis and facies are investigated and dolomite rock textures are classified. The average total porosity and effective porosity of Kangab well are 20.47% and 19.21%. The results show that saturation, porosity and lithology, k4 zone of Kangan Formation reservoir has good conditions.
The effects of CuO nanoparticles on properties of self compacting concrete with GGBFS as binder
Nazari, Ali;Rafieipour, Mohammad Hossein;Riahi, Shadi;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000061
Abstract: in this work, strength assessments and percentage of water absorption of high performance self compacting concrete containing different amounts of ground granulated blast furnace slag and cuo nanoparticles as binder have been investigated. portland cement was replaced by different amounts of ground granulated blast furnace slag and the properties of concrete specimens were investigated. although it negatively impacts the physical and mechanical properties of concrete at early age of curing, ground granulated blast furnace slag was found to improve the physical and mechanical properties of concrete up to 45 wt. (%) at later ages. cuo nanoparticles with the average particle size of 15 nm were partially added to concrete with the optimum content of ground granulated blast furnace slag and physical and mechanical properties of the specimens were measured. cuo nanoparticle as a partial replacement of cement up to 3.0 wt. (%) could accelerate c-s-h gel formation as a result of increased crystalline ca(oh)2 amount at the early age of hydration and hence increase strength and improve the resistance to water permeability of concrete specimens. the increased the cuo nanoparticles' content more than 3.0 wt. (%), causes the reduced the split tensile strength because of the decreased crystalline ca(oh)2 content required for c-s-h gel formation. several empirical relationships have been presented to predict flexural and split tensile strength of the specimens by means of the corresponding compressive strength at a certain age of curing. more rapid appearance of the peaks related to hydrated products in x-ray diffraction results, all indicate that cuo nanoparticles could improve mechanical and physical properties of the concrete specimens.
A Theoretical Approach to Applicability of Artificial Neural Networks for Seismic Velocity Analysis
Christine Baronian,Mohammad Ali Riahi,Caro Lucas,Mohammad Mokhtari
Journal of Applied Sciences , 2007,
Abstract: In this study, different synthetic earth models have been developed for providing as accurate as possible mapping between inputs and outputs. The input parameters were seismic travel times fed to input layer of ANN and the output parameters were interval velocity and structural dip fed to output layer of ANN. After training the so structured ANN the generalization ability of ANN can create desirable outputs for new input patterns. As dipping layered structures has more occurrences in nature and in subsurface of earth (like anticline shapes of hydrocarbon traps), therefore obtaining an accurate initial velocity model for dipping structures as well as dip values of each layer is an important part of later seismic imaging procedures especially in areas with little or no initial geological information available.
Analysis of Miocene Depositional Systems in Offshore Area of Strait of Hormuz Based on 3D-Seismic Data
Mohammad Alsouki,Mohammad Ali Riahi,Iraj Abdollahie Fard
Journal of Applied Sciences , 2008,
Abstract: The aim of this research are to delineate depositional systems of Strait of Hormuz area (Eastern part of Persian Gulf) included turbidity and Mass Transport Complexes (MTCs) which is characterized on seismic by chaotic reflections, scoured bases and mounded external geometry. And also to identify predominant channels types, using 3D-seismic interpretation techniques. The depositional systems are expected to be triggered by sea level variations and salt tectonic, whose volume is proportional to salt flow vigor. Two different sizes of turbidities have been detected in the study area. One is in large scale within the Mishan Formation. The other is somewhat small and only detected within the Aghajari Formation. The latter Formation represents reduction of salt movement intensity and relatively low sedimentation rate. Moreover, big channels are detected within Mishan Formation, whereas, the smaller channels are distinguished within Aghajari Formation. Presence of aforementioned depositional systems in Aghajari and Mishan Formations are clear evidences for salt deformational activities during deposition.
The Structural Imaging in Offshore Area of Strait of Hormuz Based on 3D-Seismic Data
Mohammad Alsouki,Hossein Hassani,Mehdi Irannajad,M. Ali Riahi
Journal of Applied Sciences , 2008,
Abstract: The aim of this study is to describe tectono-depositional structures resultant of Cretaceous, Tertiary and Miocene tectonic activities in offshore area of Strait of Hormuz (Eastern part of Persian Gulf) using various seismic interpretation and palinspastic restoration techniques. High quality 3D-seismic data from the offshore area of Strait of Hormuz display complex structural imaging of that found at the Northeastern margin of Arabian plate. Seismic profiles show presence of two main unconformity surfaces; the lowermost is at the base of upper Cretaceous that is called Turonian Unconformity or top Bangestan group and the upper one is at base of Miocene and is named Guri Unconformity. The overlying structures of these unconformities seem to have been exposed to compressional and extensional tectonic events; one during late Cretaceous is Oman Orogeny and the other during Oligocene-Miocene epoch is Zagros Orogeny. These events had a significant role in triggering Cambrian Hormuz Salt and formation salt diapirs. Furthermore, the tectonic activities and sea level variations have played an effective role in creation of the turbidities and mass transport complexes intra Mid Miocene Mishan Formation which are considered good places of gathering hydrocarbon due to having reservoir properties.
The effects of ZrO2 nanoparticles on physical and mechanical properties of high strength self compacting concrete
Nazari, Ali;Riahi, Shadi;
Materials Research , 2010, DOI: 10.1590/S1516-14392010000400019
Abstract: in this work, strength assessments and coefficient of water absorption of high performance self compacting concrete containing different amounts of zro2 nanoparticles have been investigated. the results indicate that the strength and the resistance to water permeability of the specimens are improved by adding zro2 nanoparticles in the cement paste up to 4.0 wt. (%). zro2 nanoparticles, as a result of increased crystalline ca(oh)2 amount especially at the early age of hydration, could accelerate c-s-h gel formation and hence increase the strength of the concrete specimens. in addition, zro2 nanoparticles are able to act as nanofillers and recover the pore structure of the specimens by decreasing harmful pores. several empirical relationships have been presented to predict flexural and split tensile strength of the specimens by means of the corresponding compressive strength at a certain age of curing. accelerated peak appearance in conduction calorimetry tests, more weight loss in thermogravimetric analysis and more rapid appearance of the peaks related to hydrated products in x-ray diffraction results, all indicate that zro2 nanoparticles could improve mechanical and physical properties of the concrete specimens.
ZrO2 nanoparticles' effects on split tensile strength of self compacting concrete
Nazari, Ali;Riahi, Shadi;
Materials Research , 2010, DOI: 10.1590/S1516-14392010000400011
Abstract: in the present study, split tensile strength of self compacting concrete with different amount of zro2 nanoparticles has been investigated. zro2 nanoparticles with the average particle size of 15 nm were added partially to cement paste (portland cement together with polycarboxylate superplasticizer) and split tensile strength of the specimens has been measured. the results indicate that zro2 nanoparticles are able to improve split tensile strength of concrete and recover the negative effects of polycarboxylate superplasticizer. zro2 nanoparticle as a partial replacement of cement up to 4 wt. (%) could accelerate c-s-h gel formation as a result of increased crystalline ca(oh)2 amount at the early age of hydration. the increased the zro2 nanoparticles' content more than 4 wt. (%), causes the reduced the split tensile strength because of unsuitable dispersion of nanoparticles in the concrete matrix.
The Effects of ZnO2 nanoparticles on strength assessments and water permeability of concrete in different curing media
Nazari, Ali;Riahi, Shadi;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000030
Abstract: in this study, the effect of limewater on strength assessments and percentage of water absorption of concrete incorporating zno2 nanoparticles has been investigated. portland cement was partially replaced by zno2 nanoparticles with the average particle size of 15 nm and the specimens were cured in water and saturated limewater for specific ages. the results indicate that zno2 nanoparticles up to 2.0 weight percent could produce concrete with improved strength and water permeability when the specimens cured in saturated limewater while this content is 1.0 weight percent for the specimens cured in tap water. although the limewater reduces the strength of concrete without nanoparticles when compared with the specimens cured in water, curing the specimens bearing zno2 nanoparticles in saturated limewater results in more strengthening gel formation around nanoparticles causes improved permeability together with high strength. in addition, zno2 nanoparticles are able to act as nanofillers and recover the pore structure of the specimens by decreasing harmful pores. accelerated peak appearance in conduction calorimetry tests, more weight loss in thermogravimetric analysis and more rapid appearance of peaks related to hydrated products in x-ray diffraction results, all indicate that zno2 nanoparticles could improve mechanical and physical properties of the specimens.
The effects of ZnO2 nanoparticles on properties of concrete using ground granulated blast furnace Slag as binder
Nazari, Ali;Riahi, Shadi;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000052
Abstract: in the present study, flexural strength together with pore structure, thermal behavior and microstructure of concrete containing ground granulated blast furnace slag with different amount of zno2 nanoparticles has been investigated. portland cement was replaced by different amounts of ground granulated blast furnace slag and the properties of concrete specimens were investigated. although it negatively impact the properties of concrete, ground granulated blast furnace slag was found to improve the physical and mechanical properties of concrete up to 45 wt. (%). zno2 nanoparticles with the average particle size of 15 nm were added partially to concrete with the optimum content of 45 wt. (%) of ground granulated blast furnace slag and physical and mechanical properties of the specimens was measured. zno2 nanoparticle as a partial replacement of cement up to 3 wt. (%) could accelerate c-s-h gel formation as a result of increased crystalline ca(oh)2 amount at the early age of hydration and hence increase flexural strength of concrete. the increased the zno2 nanoparticles' content more than 3 wt. (%), causes the reduced the flexural strength because of the decreased crystalline ca(oh)2 content required for c-s-h gel formation together with unsuitable dispersion of nanoparticles in the concrete matrix. zno2 nanoparticles could improve the pore structure of concrete and shift the distributed pores to harmless and few-harm pores.
Effects of CuO Nanoparticles on Microstructure,Physical,Mechanical and Thermal Properties of Self-Compacting Cementitious Composites

Ali Nazari,Shadi Riahi,

材料科学技术学报 , 2011,
Abstract: In the present study, split tensile strength of self-compacting concrete with different amount of CuO nanoparticles has been investigated. CuO nanoparticles with the average particle size of 15 nm were added partially to self compacting concrete and split tensile strength of the specimens has been measured. The results indicate that CuO nanoparticles are able to improve the split tensile strength of self compacting concrete and recover the negative effects of polycarboxylate superplasticizer on split tensile strength. CuO nanoparticle as a partial replacement of cement up to 4 wt% could accelerate C-S-H gel formation as a result of increased crystalline Ca(OH)2 amount at the early ages of hydration. The increase of the CuO nanoparticles more than 4 wt% causes the decrease of the split tensile strength because of unsuitable dispersion of nanoparticles in the concrete matrix. Accelerated peak appearance in conduction calorimetry tests, more weight loss in thermogravimetric analysis and more rapid appearance of related peaks to hydrated products in X-ray diffraction (XRD) results all also indicate that CuO nanoparticles up to 4 wt% could improve the mechanical and physical properties of the specimens. Finally, CuO nanoparticles could improve the pore structure of concrete and shift the distributed pores to harmless and few-harm pores.
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