eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
48362
Table of Content
https://ijogst.put.ac.ir/article_48362_53156bff2d6629cedbffe1ad870b695c.pdf
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
1
13
10.22050/ijogst.2016.38522
38522
Characterization of Reservoir Heterogeneity by Capacitance-resistance Model in Water-flooding Projects
Seyed Ehsan Eshraghi
eeshraghi1990@gmail.com
1
Mohammad Reza Rasaei
mrasaei@ut.ac.ir
2
Peyman Pourafshary
pourafshary@squ.edu.om
3
Amir Salar Masoumi
amirsalar@engineer.com
4
Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
1Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Department of Petroleum and Chemical Engineering, Sultan Qaboos University, Oman
1Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Tedious calculations and simulations are needed to obtain an efficient production scenario and/orproper field development strategy. Capacitance-resistance model (CRM) is proved to be a fastreservoir simulation tool using just the field-available data of production and injection rates. Thisapproach sets a time-constant and a weighting factor (or well-pair connectivity parameter) betweeneach pair of injection and production wells according to their histories. In this study, we investigatedthe behavior of the CRM parameters in synthetic reservoir models with different porosity andpermeability maps. Four reservoirs are considered with different porosities and permeabilities to studytheir effects on CRM response. We defined a new parameter, named error to mean production ratio(EMPR), to analyze the CRM performance. Some fluctuations are exerted on the production data toevaluate the capability of CRM against variable production records. Porosity showed a stronger effecton CRM parameters than the permeability based on the calculated EMPR. Unstable productionhistory would result in large error which can be corrected with some smoothing techniques onvariable production data. Also, a linear trend of EMPR was obtained with the change of porosity andpermeability or a combination of the two parameters within the reservoir.
https://ijogst.put.ac.ir/article_38522_45fb5b9f525464179c9d77ebd48595e0.pdf
Capacitance-resistance-model (CRM)
Water Flooding
History Match
Reservoir Heterogeneity
Well Connectivity
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
14
31
10.22050/ijogst.2016.38523
38523
An Influence of Polymer-Alkaline and Nanoparticles as Chemical Additives on the Immiscible Displacement and Phase Relative Permeability
Elham Mortazavi
mortazavi.elham86@gmail.com
1
Mohsen Masihi
masihi@sharif.edu
2
Mohammad Hosein Ghazanfari
ghazanfari@sharif.edu
3
Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
In this study, a chemical additive made by a combination of polymer, alkaline, and silica nanoparticles is used to control the oil recovery and relative permeability curves. Various parametersincluding the type and concentration of polymer, alkaline, and nanosilica particles have been studied.To evaluate the efficiency of these additives, we performed unsteady state displacement experimentsunder the JBN method and determined the pressure gradient across the core samples. Theexperimental observations emphasized that by using the appropriate chemical additives the relativepermeability of the phases is changed towards higher oil relative permeability values, which results inthe oil recovery. The results of this study can improve the chemical flooding for heavy oil recovery.
https://ijogst.put.ac.ir/article_38523_ce99759f31d1abe39662cf85dd76766b.pdf
Polymer Flooding
Alkaline-polymer Flooding
Nanopolymer Flooding
Alkaline- Nanopolymer Flooding
Unsteady State Displacement Experiments
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
32
44
10.22050/ijogst.2016.38529
38529
A Consequence Analysis of the Explosion of Spherical Tanks Containing Liquefied Petroleum Gas (LPG)
Hadi Zareei
zareei.hadi@yahoo.com
1
Mohammadreza Khosravi Nikou
mr.khosravi@put.ac.ir
2
Ahmad Shariati
shariati@put.ac.ir
3
Department of Gas Engineering, Petroleum University of Technology, Ahwaz, Iran
Department of Gas Engineering, Petroleum University of Technology, Ahwaz, Iran
Department of Gas Engineering, Petroleum University of Technology, Ahwaz, Iran
A consequence analysis was performed in one of the gas refineries in Iran to investigate the risks andpotential losses resulted from accidents. Specifically, the consequences of an explosion in LPGspherical tanks were modeled using PHAST and MATLAB software. In this paper, three methods ofcalculation of PHAST software TNT, multi-energy, and BST were used. The results showed thatmulti energy method is the best method to evaluate overpressure. It was 0.150 bar and 0.159 bar in adistance of 1000 m far from the blast using PHAST and MATLAB respectively. This overpressurecan damage a wall with 30 cm thickness. It also affects the human threshold (1%) ruptured eardrum.Finally, it was found that 100% lethality in a minute happened at 285.5 m and 37.5 kW/m2 when theexplosion happened.
https://ijogst.put.ac.ir/article_38529_b99c3da34e63defc99bfbfeb6a7dc001.pdf
Consequence Modeling
Overpressure
LPG
explosion
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
45
61
10.22050/ijogst.2016.38530
38530
Exergoeconomic Evaluation of LNG and NGL Co-production Process Based on the MFC Refrigeration Systems
Hojat Ansarinasab
1
Mahmoud Afshar
mafshar@put.ac.ir
2
Mehdi Mehrpooya
mehrpoya@ut.ac.ir
3
Department of Energy Systems Engineering, Petroleum University of Technology (PUT), Mahmoudabad, Iran
Department of Energy Systems Engineering, Petroleum University of Technology (PUT), Mahmoudabad, Iran
Renewable Energies and Environmental Department, Faculty of New Science and Technologies, University of Tehran, Iran
In this paper, exergy and exergoeconomic analysis is performed on the recently proposed process forthe coproduction of liquefied natural gas (LNG) and natural gas liquids (NGL) based on the mixedfluid cascade (MFC) refrigeration systems, as one of the most important and popular natural gasliquefaction processes. To carry out this analysis, at first, the proposed process is simulated, and thenthe exergy analysis of the process equipment is performed; finally, an economic model is used for theexergoeconomic analysis. The results include cost of exergy destruction, exergoeconomic factor,exergy destruction, and exergy efficiency. The results of the exergy analysis demonstrate that theexergy efficiency of the proposed process is around 53.83%, and its total exergy destruction rate is42617.5 kW at an LNG and NGL production rates of 68.99 kg/s and 27.41 kg/s respectively. Theresults of exergoeconomic analysis indicate that the maximum exergoeconomic factor, which is69.53%, is related to the second compressor in the liquefaction cycle and the minimumexergoeconomic factor, which is 0.66%, is related to the fourth heat exchanger in the liquefactioncycle. In this process, demethanizer tower holds the highest relative cost difference (100.78) and thefirst air cooler in liquefaction cycle has the lowest relative cost difference (1.09). One of the mostimportant exergoeconomic parameters is the cost of exergy destruction rate. The second heatexchanger has the highest exergy destruction cost (768.91 $/Gj) and the first air cooler in theliquefaction cycle has the lowest exergy destruction cost (19.36 $/Gj). Due to the high value of fuelcost rate (as defined in exergoeconomic analysis) in heat exchangers, their exergy destruction cost ismuch higher than other devices.
https://ijogst.put.ac.ir/article_38530_4b3ac05445044896487c1bdb94363ac1.pdf
Natural gas
LNG
NGL
Exergy
exergoeconomic
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
62
72
10.22050/ijogst.2015.38531
38531
Assessing the Asphaltene Adsorption on Metal Oxide Nanoparticles
Fatemeh Amin
amin@yahoo.com
1
Ali Reza Solaimany Nazar
2
Chemical Engineering Department, University of Isfahan, Isfahan, Iran
Chemical Engineering Department, University of Isfahan, Isfahan, Iran
The Taguchi design of experiments (DOE) approach is adopted here to evaluate the impact ofeffective factors such as nanoparticles type, nanoparticles to model solution mass ratio, asphaltenestructure, and temperature on asphaltene adsorption equilibrium. Herein, the toluene-asphaltenesolution model is applied. Three commercially nanoparticles (SiO2, Al2O3, and TiO2) are used.Asphaltene characterizations are carried out by X-ray diffraction (XRD) analysis. It is found that thenanoparticle type and asphaltene structure with a respective influence of 48.5% and 3.11% have themaximum and minimum contribution on the amount of adsorbed asphaltene at the selected levelsrespectively. Aluminum oxide nanoparticle has the maximum and silicon oxide nanoparticle showsthe minimum adsorption. The temperature has no statistical significance. Asphaltenes with higheraromaticity have more tendencies for adsorption on nanoparticles.
https://ijogst.put.ac.ir/article_38531_a20d3a062cd2df30da33b86dec832f81.pdf
Asphaltene
Adsorption
Nanoparticles
Taguchi design
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
73
81
10.22050/ijogst.2016.38532
38532
The Effect of Simultaneous Incorporation of PTFE Nanoparticles and Carbon Nanotubes on the Tribological Behavior of Ni-P Coating
Hamid Rahmati
hamid.rahmati@aut.ac.ir
1
Farzad Mahboobi
mahboubi@aut.ac.ir
2
Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran
Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran
In some engineering fields, wear resistance and a low friction coefficient are required at the sametime. In this research, PTFE nanoparticles and carbon nanotubes were co-deposited within Ni-Pmatrix to obtain an Ni-P-PTFE-CNT hybrid coating for wear resistance and a low friction coefficient.The tribological properties of the deposits were evaluated by pin on disc tribometer. The morphologyof the coatings and worn surface was evaluated by scanning electron microscopy. However, theresults showed that the addition of PTFE nanoparticles to the Ni-P electroless coating caused thefriction coefficient to decrease to values lower than 0.2, which led to an improvement in frictionbehavior because of its self-lubricity properties; it, however, decreased the strength of coating due topolymeric and soft structure of the molecules. The simultaneous incorporation of PTFE nanoparticlesand carbon nanotubes can provide the properties of both molecules and increased the strength ofcoating with a low friction coefficient and self-lubricity properties. Therefore, the wear rate and thedegradation of surface were decreased during the wear process.
https://ijogst.put.ac.ir/article_38532_9f4e862b7e3401f5750a3b9439eaa3b5.pdf
coating
Nickel electroless
PTFE
CNT
Wear
eng
Petroleum University of Technology
Iranian Journal of Oil and Gas Science and Technology
2345-2412
2345-2420
2016-07-01
5
3
82
87
48363
Persian Abstracts
https://ijogst.put.ac.ir/article_48363_2cc801471dab9e2e00609d3cc1a7d9b2.pdf