The Application of hydrochemical data in hydrodynamic study of Asmari reservoir, Karanj oil field
Bahman
Soleimani
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
Seyed Ehsan
Ebrahimi
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
Mousa
Zohrabzadeh
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
text
article
2012
per
Abstract
Hydrodynamics is the most important factor of transport mechanism in hydrocarbon fluid. To analyze the hydrochemical data, the Piper and Composition diagrams were used. Hydrochemical data indicating the Cl-Na type for reservoir showed mixing process with the water coming from different discharge sources to the field aquifer. It also indicated there was a weak hydrodynamic flow. Entering water with less TDS did not reduce significantly the total field of TDI. With the passingof time, water pressure in the drilled wells under study, like oil, is reduced. Moreover, it presents the best correlation between wells 7 and 14. Generally, the production index and pressure data indicated a suitable condition in the southern half of the field. The results also indicated that the aquifer potentiometric surface was tilted. Hydrodynamic model shows two regions with high hydraulic head near wells 4 and 5. From this point, the fluid refluxes towards other parts. Therefore, water expansion and over pressure are thought to be factors affecting the hydrodynamic pattern.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
1
13
https://aag.scu.ac.ir/article_11530_f852d1e15afdf3bda9de70fe16f7625b.pdf
Mineral chemistry and thermobarometry of Bibi Maryam granitoid (Northeast of Nehbandan, East of Iran)
Seyed Saeid
Mohammadi
Department of geology, faculty of sciences, University of Birjand
author
text
article
2012
per
Bibi Maryam granitoid is located in Nehbandan ophiolite, the northern part of Sistan suture zone.Field evidence proves anintrusion of granitoid into ultramafic and mafic host rocks. This mass is mainly composed of tonalite (to quartzdiorite). The main minerals are plagioclase, quartz, biotite, hornblende and little alkali feldspar and the accessory minerals include sphene, apatite, zircon and opaque (magnetite). Microprobe analyses show that plagiclases with composition ranges between Ab63.6، An36.4 to Ab50 are of andesine type. Micas are Mg-rich biotite and have tendency toward phlogobite. On the basis of biotites chemistry, Bibi Maryam granitoid is made up of a calc-alkaline magma. Calcic amphibole with magnesiohornblende composition is one of the mafic minerals in the rocks. The amphiboles under study are related to suprasubduction amphibole, S-Amph. On the basis of Al content in hornblende barometry, Bibi Maryam granitoid made under varying pressures, appeared to be 3.1-5.2 kbar; Also, according to coexisting hornblende and plagioclase thermometry, the temperature ranged from 730 to 780ºC. The estimated temperature, using zircon content versus cationic ratio [(Na+K+2Ca)/(Al*Si)] for Bibi Maryam tonalite is 750-770ºC which is comparable to that obtained by hornblende - plagioclase thermometry.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
14
28
https://aag.scu.ac.ir/article_11531_0376d333816f3c34e89379f59b60c743.pdf
Environmental geochemistry investigation of water, sediment and soils in the Darreh-zar porphyry copper deposit(Kerman)
Farid
Moore
Department of Earth Sciences, Faculty of Sciences, Shiraz University
author
Naghmeh
Soltani
Department of Earth Sciences, Faculty of Sciences, Islamic Azad University, Shiraz Branch
author
Behnam
Keshavarzi
Department of Earth Sciences, Faculty of Sciences, Shiraz University
author
Mehrdad
Karimi
Department of Earth Sciences, Faculty of Sciences, Islamic Azad University, Shiraz Branch
author
Esmat
Esmaeilzadeh
Research and Development Division, Sar Cheshmeh Copper Complex, Kerman
author
text
article
2012
per
The Darreh-zar porphyry copper deposit is located in the south of the Sarcheshmeh copper mine. In this study, environmental impact of mineralization and mining in the Darreh-zar porphyry copper deposit was investigated. For this purpose, eleven water samples, thirty-three sediment samples and fifteen soil samples were collected and analyzed. Correlation coefficients between different parameters of water samples were calculated. The results showed that samples with low pH have high concentration of sulfate and heavy metals, higher than the maximum permissible level(MPL). Plotting the concentration of major cations and anions in Piper triliner and Durov diagrams revealed that most water samples are of Ca-sulfate type. Based on the results of principal component analysis for measured parameters in water samples, 3 clusters were distinguished. Calculated geoaccumulation index and enrichment factor, indicate sediment enrichment in potentially toxic metals(Cu, Mo, Pb and Sb). The results also showed high Mo, Cu and Pb content in soil. Most soil samples with Mo anomaly content were associated with gossans. It is concluded that, in soil environment, oxidized molybdenum occurs predominantly as immobile acid molybdate anion.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
29
37
https://aag.scu.ac.ir/article_11532_3485eecd6c54b48708112e11e3f3fc10.pdf
Mineralization and ground magnetic exploration of magnetite mineralization between Baghak and C-North, Sangan iron mine, Khaf
Mohammad Hsan
Karimpour
Research Center for Ore Deposit of Eastern Iran, Ferdowsi University of Mashhad
author
Azadeh
Malekzadeh Shafaroudi
Research Center for Ore Deposit of Eastern Iran, Ferdowsi University of Mashhad
author
Abbas
Golmohammadi
Eastern Iran iron mine company
author
text
article
2012
per
The study area is located between C-North and Baghak central bodies in Sangan iron mine, Khaf, in the province of Khorasan Razavi. Sangan is the largest Iron, IOCG, skarn deposit in Iran. Rock unite are silicified shale, carbonate (Jurassic-Cretaceous age) turned to skarn, tuff and younger sub-volcanic rocks formed as stocks, sill and dykes. Small outcrops of magnetite skarn are present in central and south west of the study area with EW or NW-SE trend. Magnetite mineralization is mostly parallel to bedding dipping 40 to 60 degrees to north. Magnetic susceptibility of all rock types is between 0.01 – 15×10-3 SI and magnetite mineralization is more than 1000×10-3 SI. Ground magnetic is a very useful method for exploration of mineralization in this area due to big difference of magnetic susceptibility. Total ground magnetic intensity (TMI) varies between 44123 -68224 gamma, highest anomaly located north west of the area. In TMI map, there are two main anomalies trending northwest- southeast in the middle and southwest of area. In the RTP map, the anomalies shift to north, which is coinside with dipping the mineralization to north. The first vertical derivative map (1VD) shows that most of the anomalies are deep source. The northwest is the major anomaly in the study area. Based on this data, 10 drill holes are suggested within the hanging wall of magnetite mineralization with azimuth of 180º and angle of 80-85º S.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
38
54
https://aag.scu.ac.ir/article_11533_4bb8a301ab1da0eef64f33346a821767.pdf
Major and minor elements geochemistry of sandstones of Laloon Formation (lower Cambrian) in southwest of Mashhad, Iran
Aliasghar
Kalagari
Geology Department, Faculty of Natural Sciences, University of Tabriz, Tabriz, 51666, Iran
author
Ali
Abedini
Geology Department, Sciences Faculty, Urmia University, Urmia, 57153, Iran
author
Parvin
Najafzadeh
Geology Department, Faculty of Natural Sciences, University of Tabriz, Tabriz, 51666, Iran
author
text
article
2012
per
Laloon Formation (lower Cambrain) in southwest of Mashhad is characterized by a sequence of layers of sandstone (quartz-arenite, sub-litharenite, and Fe-bearing sand) and conglomerate. Petrographic investigations show that quartz is the main detrital mineral in these rocks accompanied by lesser amounts of chert, feldspar, mica, and zircon. Based upon geochemical studies, tectonic setting of these sandstones is the inactive continental margin environment. Values of chemical index of alteration (CIA) (61.51 to 74.38%) and plagioclase index of alteration (PIA) (53.54 to 67.07%) indicate that these sandstones were evolved under moderate weathering conditions. Geochemical considerations reveal a felsic to intermediate igneous provenance for these rocks. By combining the petrographical and geochemical data, it can be deduced that these rocks were likely derived from the erosion of low-grade metamorphosed acid igneous bodies and their related pegmatitic veins. These rocks have suitable economic potential for silica exploitation.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
55
68
https://aag.scu.ac.ir/article_11534_7b33ea0ca6376f0b6a9a31b495c19936.pdf
Contaminant Transport Modeling due to Leachate Leaking of Rasht
waste disposal site
Mohammad
Nakhaei
Department of Geology, Kharaizmi University, Iran
author
Hamidreza
Nassery
Department of Geology, Kharaizmi University, Iran
author
Vahab
Amiri
Department of Geology, Kharaizmi University, Iran
author
text
article
2012
per
The current study evaluated Rasht waste disposal site which is considered as one of the contamination sources in the northern part of Iran. The current research used the Visual HELP and HYDRUS 3D softwares to determine the rate of leachate product and assess the contaminant transport respectively. The rate of leachate product was determined according to structural and climatological conditions of waste disposal site which was equal to 0.69 m/year. The Nitrogen-Ammonia (N(NH4+)) used in the present study was considered as a conservative factor for evaluation of contaminant transport. The analysis of the breakthrough curve of p1 and p2 which are located below blocks 1 and 3 of the waste disposal site respectively, denotes that increasing the concentration of Nitrogen–Ammonia continues to 4 years when leaking has started. After this time, the concentration begins to reduce and this process continues to the approximate concentration of 5000 for p1 and 6000 mg/m3 for p3. The analysis of p5 that is located at 610 meters of west end of waste disposal site shows that the contaminant pulse with concentration of 1mg/m3 enters this point after 2 years. The breakthrough curve of p7 which is located at 750 meters of north waste disposal site denotes that the concentration of 45mg/m3 inters this point after 10 years. In order to analyze the infiltration of contaminant in depth below the surficial sediments, the concentration changes were assessed at p8 to p12 which were located in bedrock.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
69
82
https://aag.scu.ac.ir/article_11535_915a6f4272a86b99a3e4485aa8f84397.pdf
Hydrocarbon related pollution and biological removal of Arsenic in the Garu springs, Masjed Solyman Region, Khuzestan province
Manouchehr
Chitsazan
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
Golgol
Ghaderi
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
Seyed Yahya
Mirzaei
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
Moslem
PapeyZadeh
Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
author
text
article
2012
per
Traces of oil can be observed in Garu spring. Determining the pollution-level of six brackish springs namely Garu springs and investigating the effectiveness of bioremediation as groundwater treatment technology, were the main objectives of the present study. For this purpose, these springs and the river in the study area weresampled and major ions were analyzed by ionchromatography method in water laboratory at geology department of Shahid Chamran University. Also, heavy metals including Fe, Ni, V and As were analyzed by ICP method Plotting results on piper diagram showed a dominant Na-Cl water type that has originated from different sources.The ratio of sodium to chloride in spring number 1, 3 and 4 was 0.57، 0.57 and 0.58, respectively, which indicated that the salinity was due to oil field brines. After identification of natural pollution of garu spring by heavy metalsincluding As bioremediation was followed as another objective of hydrochemical assessment of Garau spring. Removal of pollution by this method is an attractive alternative in case of arsenic, compared to physico-chemical treatment. Application of this method shows that removal of arsenic by sulfate –reducing bacteria is 89.7%.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
83
93
https://aag.scu.ac.ir/article_11536_fc2e92947a70e19c614341ae4fafcbaf.pdf
Karst system analysis of Asmari and Ilam-Sarvak formations in the South-West of Izeh
Hamid Reza
Nassery
Faculty of Earth Science, Shahid Beheshti University, Tehran, Iran
author
Farshad
Alijani
Faculty of Earth Science, Shahid Beheshti University, Tehran, Iran
author
text
article
2012
per
In this study, long-duration pumping tests performed in the seven karst wells in Asmari Formation (Kamarderaz and Chal Khoshk Anticlines) and Ilam-Sarvak Formation (Tanush and Shavish Anticlines), south west Izeh, were analyzed and interpreted. The drawdown in fractures and rock matrix was simulated using double-porosity model. The hydraulic of flow in Asmari and Ilam-Sravak Formations was simulated based on the results of interpretation of pumping tests. The maximum and minimum of transmisivity was calculated in well no. 2 (21200 ) and well no. 7 (64 ), respectively. The log-log diagnostic plot of drawdown derivative at the three karst wells in Ilam-Sarvak aquifers was fit to double-porosity type curves. The smooth increases of water levels in the karst wells of the Asmari aquifer were coincident to the diffuse recharge and flow in the high storage capacity matrix. The results showed that the double-porosity model was not able to simulate the filtering effects of diffuse recharge and the flow in the low impermeability – high storage capacity limestone.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
94
104
https://aag.scu.ac.ir/article_11537_1ec863cd516341eddba979b06a98e99c.pdf
Potential mapping of East-Azerbaijan geothermal resources in 1:250000 scale by geological and exploration data in GIS environment
Saba
Keynejad
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
Ahmadrez
Mokhtari
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
Nader
Fathianpour
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
Mohammadreza
Irannajadi
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
text
article
2012
per
In this paper, the potential of geothermal resources in the East Azerbaijan province was mapped using two different knowledge driven data integration approaches in a Geographic Information System (GIS). The main objective of producing such favorability map was to introduce the highly promising areas to the next exploration stages planned as part of a systematic geothermal resource exploration program. In this regard, evidential layers considered as indicators of geothermal resources have been specified and processed. The input dataset were categorized in three thematic groups including geological, geophysical and remotely sensed extracted data layers required for further processing in 1:250000 scale. The evidential layers were then integrated using Boolean and Weighted Overlay approaches. The results of these knowledge-driven integration methods were mapped to highlight the most favorable areas in the East Azerbaijan province for the next step of the planned geothermal exploration program. These areas which cover small portion of the province are consistent and correlated with each other as they do with the ground truths. The results showed that 100 percent of all known hot springs considered as ground truth realizations fall in the favorable areas obtained using Boolean approach while for the weighted overlay approach this figure amounts to 81.3 percent.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
105
116
https://aag.scu.ac.ir/article_11538_ff23e3cef2dfb2909595b15fc1dc49f3.pdf
Study of engineering geological properties of Qom formation limestones in the East and North-east of Hamedan.
Mohammad Hosein
Ghobadi
Bu-Ali Sina university, Hamedan, Iran
author
Masoumeh
Kapelehe
Bu-Ali Sina university, Hamedan, Iran
author
text
article
2012
per
The main purpose of this research was to assess the engineering geological properties of Qom formationlimestones in the east and north-east Hamedan. To this end, 100 samples of limestone were selected from the East and North-East Hamedan and the relationships between petrographic characteristics, physical and mechanical properties were investigated. Index properties such as porosity, dry unit weight, schmit hammer value, point load strength and slake durability index were determined. The petrographic characteristics of the studied rocks such as texture, mineral composition and microstructure were analyzed in thin sections and their intrinsic influence on the physical properties such porosity, mechanical properties such as strength and solubility were also investigated. Microscopic studies on the limestones revealed, that according to Dunham classification, they were grainstone, packstone, wackestone and calcarenite.
Advanced Applied Geology
Shahid Chamran University of Ahvaz
2251-7057
2
v.
1
no.
2012
117
128
https://aag.scu.ac.ir/article_11539_6fe7b368fbd7d71b89413dd8f2ffb21b.pdf