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Estimation of sediment load and erosion of different geological units: A case study from a basin of north-eastern Iran

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Journal of Mountain Science 2021年第6期18卷 1591-1608页

作者： Maryam TAJBAKHSHIAN Abolfazl MOSAEDI Mohamad Hosein MAHMUDY GHARAIE sayyed reza moussavi harami Department of Geology Ferdowsi University of MashhadMashhad ***Iran Department of Water Science and Engineering Ferdowsi University of MashhadMashhad ***Iran

Erosion of geological units and sediment load in rivers can be considered as the serious problems in recent *** sediment loads generate major hazards for water resources development,particularly in terms of loss of reservoir storage due to sedimentation and siltation of water distribution *** this paper,the performance of four sediment rating curve (SRC) development methods was evaluated for the Shirin Darreh River(SDR) basin (1750 km^(2)),located in North Khorasan Province,*** of flow discharge (Q) and suspended sediment flux (SSF)(Q-SSF pairs,N=957)and daily flow discharge,recorded by the Regional Water Company of North Khorasan (RWCNK) at the Qaleh-Barbar (QB) gauging site during 1989-2018 were *** flow discharge classification method performed best by meeting the desired criteria of most statistical indices,including normalized root mean square error (NRMSE),mean bias error (MBE),mean absolute error (MAE),index of agreement (d),and coefficient of determination (R^(2)).Based on the optimized method,the rate of suspended sediment transportation at the study site was estimated about2.7×10^(6) ton year^(-1).Erodibility of the exposed formations in the study area was estimated based on a factorial scoring model (FSM).Three indices,focused on the outcrop and erodibility,were calculated for the geological units at sub-basin and total *** deposits are the most extensive geological unit in the three sub-basins and the maximum formation outcrop ratio (FOR) and participation in erosion (PCE)were obtained for these rocks at total *** fact,marl unit can be regarded as the main source to supply the suspended sediments in the study basin.

关键词： Geological units Sediment rating curve Flow discharge Suspended sediment concentration Erodibility

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Reservoir heterogeneity and fracture parameter determination using electrical image logs and petrophysical data(a case study, carbonate Asmari Formation, Zagros Basin, SW Iran)

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Petroleum Science 2020年第1期17卷 51-69页

作者： Ghasem Aghli reza moussavi-harami Ruhangiz Mohammadian National Iranian South Oil Company(NISOC) AhvazIran Department of Geology Ferdowsi University of MashhadMashhadIran

Assessment of reservoir and fracture parameters is necessary to optimize oil production,especially in heterogeneous *** and image logs are regarded as two of the best methods for this ***,due to core limitations,using image log is considered as the best *** study aims to use electrical image logs in the carbonate Asmari Formation reservoir in Zagros Basin,SW Iran,in order to evaluate natural fractures,porosity system,permeability profile and heterogeneity index and accordingly compare the results with core and well *** results indicated that the electrical image logs are reliable for evaluating fracture and reservoir parameters,when there is no core available for a *** on the results from formation micro-imager(FMI)and electrical micro-imager(EMI),Asmari was recognized as a completely fractured reservoir in studied field and the reservoir parameters are mainly controlled by ***,core and image logs indicated that the secondary porosity varies from 0%to 10%.The permeability indicator indicates that zones 3 and 5 have higher permeability *** log permeability index shows a very reasonable permeability profile after scaling against core and modular dynamics tester mobility,mud loss and production index which vary between 1 and 1000 *** addition,no relationship was observed between core porosity and permeability,while the permeability relied heavily on fracture ***,fracture aperture was considered as the most important parameter for the determination of *** changes were also observed at zones 1-1 and 5 in the permeability trend,due to the high fracture *** can be concluded that the electrical image logs(FMI and EMI)are usable for evaluating both reservoir and fracture parameters in wells with no core data in the Zagros Basin,SW Iran.

关键词： FMI and EMI image logs Porosity and permeability Fractures Core data Heterogeneity index

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Provenance, Tectonic Setting and Geochemistry of Ahwaz Sandstone Member(Asmari Formation, Oligo-Miocene), Marun Oilfield, Zagros Basin, SW Iran

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Acta Geologica Sinica(English Edition) 2014年第3期88卷 931-948页

作者： Shahram AVARJANI Asadollah MAHBOUBI reza moussavi-harami Hassan AMIRI-BAKHTIAR Department of Geology Faculty of Science Ferdowsi University of MashhadIran Department of Geology National Iranian south Oil CompanyIran

The Asmari Formation deposited in the Zagros foreland basin during the ***,the Asmari Formation consists of limestone,dolomitic limestone,dolomite,argillaceous limestone,some anhydrite （Kalhur Member） and sandstones （Ahwaz Member）.This study is based on the analysis of core samples from four subsurface sections （wells Mn-68,Mn-281,Mn-292 and Mn-312） in the Marun Oilfieid in the Dezful embayment subzone in order to infer their provenance and tectonic setting of the Ahwaz Sandstone *** data reveal that the Ahwaz Sandstone comprises 97.5% quartz,1.6% feldspar,and 0.9% rock fragments and all samples are classified as quartz *** provenance and tectonic setting of the Ahwaz Sandstone have been assessed using integrated petrographic and geochemical *** analysis reveals that mono-and poly-crystalline quartz grains from metamorphic and igneous rocks of a craton interior setting were the dominant ***,major and trace element concentrations in the rocks of the Ahwaz Sandstone indicate deposition in a passive continental margin *** indicated by the CIW index （chemical index of weathering） of the Ahwaz Sandstone （average value of 82） their source area underwent ＂intense＂ recycling but ＂moderate to high＂ degree of chemical *** petrography and geochemistry results are consistent with a tropical,humid climate and low-relief highlands.

关键词： Asmari Formation Dezful Embayment provenance tectonic setting sandstone,geochemistry Ahwaz Sandstone Member

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Facies Analysis and Sequence Stratigraphy of Silurian Carbonate Ramps in the Turan(Kopeh-Dagh) and Central Iran Plates with Emphasis on Gondwana Tectonic Event

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Acta Geologica Sinica(English Edition) 2015年第4期89卷 1276-1295页

作者： Zohreh NOWROUZI Asadollah MAHBOUBI reza moussavi-harami Mohammad Hossein MAHMUDY GHARAIE Farzin GHAEMI Department of Geology Faculty of SciencesFerdowsi University of Mashhad

Two sections from the Silurian deposits in the Central Iran Micro and Turan Plates were measured and sampled. These deposits are mostly composed of submarine volcanic rocks, skeletal and non-skeletal limestone, shale and sandstone that were deposited in low to high energy conditions （from tidal flat to deep open marine）. According to gradual deepening trend, wide lateral distribution of facies as well as absence of resedimentation deposits, a depositional model of a homoclinal ramp was proposed for these deposits. Field observations and facies distribution indicate that, two depositional sequences were recognized in both sections. These sections show similarities in facies and depositional sequence during the Early Silurian in the area. Although there are some opinions and evidences that demonstrated Paleo-Tethys rifting phase started at the Late Ordovician-Early Silurian, similarities suggest that the Turan and Iran Plates were not completely detached tectonic block during this time, and that their depositional conditions were affected by global sea level changes and tectonic events.

关键词： facies sequence stratigraphy Silurian Central Iran Plate Turan Plate

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Geochemistry of Carboniferous Sandstones (Sardar Formation), East-Central Iran: Implication for Provenance and Tectonic Setting

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Acta Geologica Sinica(English Edition) 2012年第5期86卷 1200-1210页

作者： Mohammad KHANEHBAD reza moussavi-harami Asadollah MAHBOUBI Mehdi NADJAFI Mohammad Hosein MAHMUDY GHARAIE Department of Geology Faculty of Sciences Ferdowsi University of MashhadMashhad Iran

Geochemical analysis of sandstones from the Sardar Formation （from two stratigraphic successions） in east-central Iran were used for identification of geochemical characterization of sandstones, provenance and tectonic setting. Sandstones in the two lithostratigraphic successions have similar chemical compositions suggesting a common provenance. Bulk-rock geochemistry analysis of Carboniferous sandstones from Sardar Formation indicates that they are mainly quartz dominated and are classified as quartzarenites, sublitharenites and subarkoses, derived from acid igneous to intermediate igneous rocks. Discrimination function analysis indicates that the sandstones of Sardar Formation were derived from quartzose sedimentary provenance in a recycled orogenic setting. Also, major and trace elements in sandstones of Sardar Formation （e.g., K2O/Na2O vs. SiO2 ） indicate deposition in a stable passive continental margin （PM）. Chemical index of alteration （CIA） for these rocks （65%） suggests a moderate to relatively high degree of weathering in the source area.

关键词： provenance Carboniferous tectonic setting geochemistry Sardar Formation Iran

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Facies Analysis and Sequence Stratigraphy of the Qal'eh Dokhtar Formation(Middle-Upper Jurassic) in the West of Boshrouyeh, East Central Iran

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1797-1819页

作者： Mahnaz SABBAGH BAJESTANI Asadollah MAHBOUBI reza moussavi-harami Ihsan AL-AASM Mehdi NADJAFI Department of Geology Faculty of Sciences Ferdowsi University of Mashhad Department of Earth and Environmental Sciences University of Windsor

The study area is located in the east Tabas Block in Central Iran. Facies analysis of the Qal＇eh Dokhtar Formation（middle Callovian to late Oxfordian） was carried out on two stratigraphic sections and applied to depositional environment and sequence stratigraphy interpretation. This formation conformably overlies and underlies the marly-silty Baghamshah and the calcareous Esfandiar formations, respectively. Lateral and vertical facies changes documents low-to high energy environments, including tidal-flat, beach to intertidal, lagoon, barrier, and open-marine. According to these facies associations and absence of resedimentation deposits a depositional model of a mixed carbonate-siliciclastic ramp was proposed for the Qal＇eh Dokhtar Formation. Seven third-order depositional sequences were identified in each two measured stratigraphic sections. Transgressive systems tracts（TSTs） show deepening upward trends, i.e. shallow water beach to intertidal and lagoonal facies, while highstand systems tracts（HST） show shallowing upward trends in which deep water facies are overlain by shallow water facies. All sequence boundaries（except at the base of the stratigraphic column） are of the no erosional（SB2） types. We conclude eustatic rather than tectonic factors played a dominant role in controlling carbonate depositional environments in the study area.

关键词： Sequence stratigraphy Qal9eh Dokhtar Formation mixed sUiciclastic-carbonate ramp Jurassic Central Iran

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Seismic geomorphology and stratigraphic trap analyses of the Lower Cretaceous siliciclastic reservoir in the Kopeh Dagh-Amu Darya Basin

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Petroleum Science 2019年第4期16卷 776-793页

作者： Gholamreza Hosseinyar reza moussavi-harami Iraj Abdollahie Fard Asadollah Mahboubi Rooholah Noemani Rad Department of Geology Faculty of ScienceFerdowsi University of MashhadMashhad 91775-1436Iran Geophysics Department NIOC Exploration DirectorateTehran 19395-6669Iran

Lower Cretaceous Shurijeh–Shatlyk Formations host some of the main reservoirs in the Kopeh Dagh-Amu Darya *** in this area so far has focused on the development of structural traps, but recognition of stratigraphic traps in this area is of increasing importance. Integration of 3D seismic data with borehole data from thirteen wells and five outcrop sections was used to identify potential reservoir intervals and survey the hydrocarbon trap types in the East Kopeh Dagh Foldbelt(NE Iran). Analyses of horizontal slices indicated that the lower Shurijeh was deposited in a braided fluvial ***, three types of channel were identified in the lower Shurijeh Formation: type 1, which is low-sinuosity channels interpreted to be filled with non-reservoir fine-grained facies;type 2, which is a moderately sinuous sand-filled channel with good prospectively;and type 3, which is narrow, high sinuosity channel filled with fine-grained sediments. Results indicate that upper Shurijeh–Shatlyk Formations were deposited in fluvial to delta and shallow marine environments. The identified delta forms the second reservoir zone in the Khangiran Field. Study of the stratigraphic aspects of the Shurijeh succession indicates that both lower and upper Shurijeh reservoirs are stratigraphic reservoir traps that improved during folding.

关键词： 3D seismic Fluvial Stratigraphic trap Cretaceous Kopeh Dagh Amu Darya

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Depositional Controls on the Ichnology of Ordovician Wave-dominated Marine Facies：New Evidence from the Shirgesht Formation,Central Iran

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Acta Geologica Sinica(English Edition) 2016年第5期90卷 1572-1597页

作者： Aram BAYET-GOLL Paul M.MYROW Guillermo F.ACENOLAZA reza moussavi-harami Asadollah MAHBOUBI Department of Earth Sciences Institute for Advanced Studies in Basic Sciences (IASBS) P.O. Box 45195 -1159 Zanjan Iran Department of Geology Faculty of Science Ferdowsi University ofMashhad Iran Department of Geology The Colorado College 14 E. Cache La Poudre Colorado Springs Colorado 80903 U.S.A. INSUGEO (Instituto Superior de Correlacidn Geologica) CONICET- National University of Tucuman Argentina

The Lower Ordovician Shirgesht Formation in central Iran is composed of siliciclastic and carbonate rocks deposited in diverse coastal and marine shelfal environments（tidal flat,lagoon,shoreface,offshore-shelf and carbonate ramp）.Five facies associations contain diverse ichnofossil assemblages that show distinct proximal to distal trends formed in a wide range of physical-chemical *** ethological groups of trace fossils in the Shirgesht Formation reflect a gradient of depositional stress conditions across a wave-influenced shoreline and *** of waveinfluenced environments make up a significant component of the geological record of shallow marine settings,and the ability to determine paleoenvironments in detail in such successions is critical for reconstruction of depositional histories and sequence-stratigraphic *** Cruziana ichnofacies of the study shows highly diverse suites that record the establishment of a benthic community under stable conditions and a long-term colonization *** Skolithos ichnofacies recognized is a low diversity opportunistic ichnocommunity suite that resulted from colonization after tempestite deposition in a stressed *** strata record an onshore to offshore replacement of the Cruziana ichnofacies（with abundant feeding traces of deposit-feeders） by the Skolithos ichnofacies（dominated by suspension-feeders and predators）.A transitional zone between the two ichnofacies coincides with the offshore-transition/distal lower-surface *** distribution of ichnofacies,the diversity and range of ethological characteristics reflected by the ichnogenera,and the wide range of wave-dominated coastal facies demonstrate the potential to use individual trace fossils and ichnofacies for significantly refined palaeoenvironmental analysis of wavedominated coastal settings,particularly in Ordovician successions.

关键词： Shirgesht Formation Ordovician facies associations sedimentology iconology ichnofacies

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Detrital Mode and Geochemistry of the Shurijeh Formation (Late Jurassic-Early Cretaceous) in the Central and Western Parts of the Intracontinental Kopet-Dagh Basin, NE Iran: Implications for Provenance, Tectonic Setting and Weathering Processes

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 1058-1080页

作者： M. MORTAZAVI R. moussavi-harami A. MAHBOUBI Department of Geology Faculty of science Ferdowsi University of Mashhad

Petrographical and geochemical methods were combined to investigate the provenance, geodynamic and weathering history of the Shurijeh sandstones, Kopet-Dagh Basin. The point-counting method and XRF technique are used for modal and geochemical analyses. Based on petrographical examinations, it seems that the Shurijeh sandstones are mainly deposited in the craton interior and recycled orogen belts. In addition to petrographical investigation, geochemical analyses （major oxides and trace elements） of Late Jurassic-Early Cretaceous rocks reveal that the sedimentation processes are performed in a passive continental margin. Such interpretation is supported with geodynamic and paleogeographical studies of the Kopeh-Dagh basin during this time. The geochemical investigations suggested that the composition of probable source rocks mostly was acidic-intermediate with minor mafic igneous rocks. Based on the above, Paleo-Tethys remnants and their collision-related granitoids, in the south and west of Mashhad, may have been the source area for these rocks. CIA values, which range from 63.8 to 94.9 in samples, are suggesting a moderate to relatively high degree of alteration （weathering） in the source area. Therefore, petrographical and paleogeographical studies of siliciclastic rocks can be used for the provenance, tectonic setting and paleoweathering studies in the source area.

关键词： petrography geochemistry tectonic setting provenance weathering processes ShurijehFormation

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The effects of diagenesis on the petrophysical and geochemical attributes of the Asmari Formation,Marun oil field,southwest Iran

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Petroleum Science 2020年第2期17卷 292-316页

作者： J.Jafari A.Mahboubi R.moussavi-harami I.S.Al-Aasm Department of Geology Faculty of ScienceFerdowsi University of MashhadMashhadIran Department of Earth and Environmental Sciences University of WindsorWindsorCanada

The distribution of good reservoir quality and its causes is the main challenges in carbonate reservoir *** study investigates the effects of diagenetic processes on the reservoir quality of the carbonate successions of the Asmari Formation,in the Marun oil field,southwest *** study applies an integrated approach including core petrography,petrophysical rock typing,stable carbon and oxygen isotopes as well as major and trace elements *** studies and geochemical analyses express that the Asmari limestones have been affected mainly by compaction,dissolution,recrystallization,calcite and anhydrite cementation and *** those diagenetic overprints,dolomitization and dissolution played an important role to enhance the reservoir quality of the ***,four types of dolomites were recognized and the rate of dolomitization increases toward the top of the Asmari carbonate *** models for dolomitization include mixing zone,brine reflux,seepage reflux and tidal pumping of *** Flow Zone Index and Discrete Rock Type concepts led to classification of the Asmari reservoir into seven reservoir rock *** reservoir rock typing with petrographic studies and geochemical analyses also confirms that reservoir quality of the Asmari *** have been mainly controlled by diagenetic ***,stable isotopes,trace elements and facies analyses support the idea that carbonate intervals of the Asmari Formation were deposited in a warm,shallow-water environment under a saline condition.

关键词： Zagros basin Marun oil field Oligo-Miocene Asmari Fm Diagenesis Geochemical characteristics and Reservoir quality

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