101. A Novel Technique for Determination of the Onset of Alkane Induced Asphaltene Precipitation Using Accurate Density Measurements

Mahdi Kalantari Meybodi; Jamshid Moghadasi

Volume 5, Issue 4 , Autumn 2016, , Pages 25-35

http://dx.doi.org/10.22050/ijogst.2016.41573

Abstract
  Onset of asphaltene precipitation is the key parameter in dealing with asphaltene problems because it is the starting point of the asphaltene separation from the solution. In this study, a new technique is provided based on the experimental observations for the determination of the onset of asphaltene ...  Read More

102. Adoptive Control of Well Drilling Systems

Karim Salahshoor; Behnam Lotfi

Volume 2, Issue 4 , Autumn 2013, , Pages 26-38

http://dx.doi.org/10.22050/ijogst.2013.4794

Abstract
  Control of well drilling operations poses a challenging issue to be tackled. The loss of well control could lead to the occurrence of blowout as a severe threat, involving the risk of human lives and environmental and economic consequences. Conventional proportional-integral (PI) controller is a common ...  Read More

103. Optimization of the Cost Function in the Drilling of Oil Well Network by Balas Algorithm

Bijan Maleki; Kamil Ahmadi; Abdolazim Jafari

Volume 3, Issue 3 , Summer 2014, , Pages 26-38

http://dx.doi.org/10.22050/ijogst.2014.6619

Abstract
  The most costly operation in the oil exploration is the well network drilling. One of the most effective ways to reduce the cost of drilling networks is decreasing the number of the required wells by selecting the optimum situation of the rig placement. In this paper, Balas algorithm is used as a model ...  Read More

104. Stability of Silica Nanoparticle Dispersion in Brine Solution: An Experimental Study

Jaber Esmaeeli Azadgoleh; Riyaz Kharrat; Nasim Barati; Ameneh Sobhani

Volume 3, Issue 4 , Autumn 2014, , Pages 26-40

http://dx.doi.org/10.22050/ijogst.2014.7485

Abstract
  Nanotechnology has various applications in oil and gas industry such as enhanced oil recovery (EOR). The main challenge in using nanoparticles in EOR processes is their stability in harsh conditions such as high temperature, high pressure, and intermediate to high salinity. However, most of the recent ...  Read More

105. Measurement and Prediction of Time-independent and Time-dependent Rheological Behavior of Waxy Crude Oil

Yavar Karimi; Ali Reza Solaimany Nazar

Volume 6, Issue 1 , Winter 2017, , Pages 26-44

http://dx.doi.org/10.22050/ijogst.2017.44374

Abstract
  Wax deposition phenomenon changes the rheological behavior of waxy crude oil completely. In the current work, the rheological time-dependent and time-independent behaviors of waxy crude oil samples are studied and flow curve and compliance function are measured for the oil samples with various wax contents ...  Read More

106. An Experimental Investigation of the Catalytic Effect of Fe2O3 Nanoparticle on Steam Injection Process of an Iranian Reservoir

Sahar Afzal; Mohammad Nikookar; Mohammad Reza Ehsani; Emad Roayaei

Volume 3, Issue 2 , Spring 2014, , Pages 27-36

http://dx.doi.org/10.22050/ijogst.2014.6033

Abstract
  Nanotechnology has the potential to introduce revolutionary changes to several areas of oil and gas industry such as exploration, production, enhanced oil recovery, and refining. In this paper, the effect of different concentrations of Fe2O3 nanoparticles as a catalyst on the heavy oil viscosity at various ...  Read More

107. An Improvement in Temporal Resolution of Seismic Data Using Logarithmic Time-frequency Transform Method

Amin Roshandel Kahoo; Saman Gholtashi

Volume 4, Issue 2 , Spring 2015, , Pages 27-39

http://dx.doi.org/10.22050/ijogst.2015.9587

Abstract
  The improvement in the temporal resolution of seismic data is a critical issue in hydrocarbon exploration. It is important for obtaining more detailed structural and stratigraphic information. Many methods have been introduced to improve the vertical resolution of reflection seismic data. Each method ...  Read More

108. A Novel Integrated Approach to Oil Production Optimization and Limiting the Water Cut Using Intelligent Well Concept: Using Case Studies

Turaj Behrouz; Mohammad Reza Rasaei; Rahim Masoudi

Volume 5, Issue 1 , Winter 2016, , Pages 27-41

http://dx.doi.org/10.22050/ijogst.2016.13827

Abstract
  Intelligent well technology has provided facility for real time production control through use of subsurface instrumentation. Early detection of water production allows for a prompt remedial action. Effective water control requires the appropriate performance of individual devices in wells on maintaining ...  Read More

109. A Consequence Analysis of the Explosion of Spherical Tanks Containing Liquefied Petroleum Gas (LPG)

Hadi Zareei; Mohammadreza Khosravi Nikou; Ahmad Shariati

Volume 5, Issue 3 , Summer 2016, , Pages 32-44

http://dx.doi.org/10.22050/ijogst.2016.38529

Abstract
  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 ...  Read More

Mechanical Engineering
110. Advanced Analysis of Dew Point Control Unit of Hybrid Refrigeration Systems in Gas Refineries

Mahmoud Afshar; Hamid Rad

Volume 7, Issue 3 , Summer 2018, , Pages 32-52

http://dx.doi.org/10.22050/ijogst.2017.60794.1376

Abstract
  In this paper, an advanced analysis of a novel hybrid compression-absorption refrigeration system (HCARS) for natural gas dew point control unit in a gas refinery is presented. This unit separates the heavy hydrocarbon molecules in the natural gas, which is traditionally carried out by natural gas cooling ...  Read More

111. An Experimental Study on Permeability Reduction Resulting from Mixed BaSO4, CaSO4, and SrSO4 Scale Deposition in Porous Media during Water Injection

Saeed Naseri; Jamshid Moghadasi; Mohammad Jamialahmadi

Volume 4, Issue 4 , Autumn 2015, , Pages 33-49

http://dx.doi.org/10.22050/ijogst.2016.12478

Abstract
  Sulfate scale deposition (BaSO4, CaSO4, and SrSO4) is a common problem in oilfield operations around the world, which causes significant formation damage during production and injection activities. This paper presents the results of an experimental study on the permeability reduction of porous media ...  Read More

Petroleum Engineering
112. Sand Production Control in Sandstone Reservoirs Using a Modified Urea-formaldehyde Re

Mohammad reza Talaghat; Ahmad Reza Bahmani

Volume 6, Issue 2 , Spring 2017, , Pages 33-45

http://dx.doi.org/10.22050/ijogst.2017.47418

Abstract
  Several techniques have been used for sand production control in sandstone reservoirs.The main objective of this research is to present a suitable resin to be used as a consolidation agent in oil reservoirs. To achieve this purpose, urea-formaldehyde resin, phenol-formaldehyde resin, and modified urea-formaldehyde ...  Read More

113. A CFD Simulation of Hydrogen Production in Microreactors

Javad Sabziani; Atallah Sari

Volume 4, Issue 1 , Winter 2015, , Pages 35-48

http://dx.doi.org/10.22050/ijogst.2015.8614

Abstract
  In this study, the modeling of hydrogen production process in microreactors by methanol-steam reforming reaction is investigated. The catalytic reaction of methanol-steam reforming producing hydrogen is simulated considering a 3D geometry for the microreactor. To calculate diffusion among species, mixture ...  Read More

114. A New Approach to Simultaneously Enhancing Heavy Oil Recovery and Hindering Asphaltene Precipitation

Edris Junaki; Shima Ghanaatian; Ghasem Zargar

Volume 1, Issue 1 , Autumn 2012, , Pages 37-42

http://dx.doi.org/10.22050/ijogst.2012.2773

Abstract
  A new chemical compound is developed at Petroleum University of Technology to enhance the recovery of the free imbibition process and simultaneously hinder asphaltene precipitation. The compound is tested on heavy oil samples from Marun oil field, Bangestan reservoir. The effects of the chemical compound ...  Read More

115. Determination of Pore Pressure from Sonic Log: a Case Study on One of Iran Carbonate Reservoir Rocks

Morteza Azadpour; Navid Shad Manaman

Volume 4, Issue 3 , Summer 2015, , Pages 37-50

http://dx.doi.org/10.22050/ijogst.2015.10366

Abstract
  Pore pressureis defined as the pressure of the fluid inside the pore space of the formation, which is also known as the formation pressure. When the pore pressure is higher than hydrostatic pressure, it is referred to as overpressure. Knowledge of this pressure is essential for cost-effective drilling, ...  Read More

116. Asphaltene Deposition Modeling during Natural Depletion and Developing a New Method for Multiphase Flash Calculation

Gholamreza Fallahnejad; Riyaz Kharrat

Volume 5, Issue 2 , Spring 2016, , Pages 45-65

http://dx.doi.org/10.22050/ijogst.2016.15798

Abstract
  The specific objective of this paper is to develop a fully implicit compositional simulator for modeling asphaltene deposition during natural depletion. In this study, a mathematical model for asphaltene deposition modeling is presented followed by the solution approach using the fully implicit scheme. ...  Read More

Petroleum Engineering – Reservoir
117. An Experimental Investigation of Water Effects on Asphaltene Surface Behavior through Interfacial Tension Measurements

Ramin Moghadasi; Jamshid Moghadasi; Shahin Kord

Volume 7, Issue 4 , Autumn 2018, , Pages 45-58

http://dx.doi.org/10.22050/ijogst.2018.108233.1422

Abstract
  As a physiochemical property, asphaltenes are known to be one the most surface active compounds in crude oil. Due to such property, their behavior is most probably influenced by fluid-fluid interactions at the contact surface (interface). Potentially and naturally, in most cases, water is in contact ...  Read More

Chemical Engineering – Gas Processing and Transmission
118. Optimization and Modeling of CuOx/OMWNT’s for Catalytic Reduction of Nitrogen Oxides by Response Surface Methodology

Mahnaz Pourkhalil

Volume 8, Issue 1 , Winter 2019, , Pages 47-59

http://dx.doi.org/10.22050/ijogst.2017.108360.1424

Abstract
  A series of copper oxide (CuOx) catalysts supported by oxidized multi-walled carbon nanotubes (OMWNT’s) were prepared by the wet impregnation method for the low temperature (200 °C) selective catalytic reduction of nitrogen oxides (NOx) using NH3 as a reductant agent in the presence of excess ...  Read More

Chemical Engineering
119. Nitrogen Adsorption on Molecular Sieve Zeolites: An Experimental and Modeling Study

Erfan Tooraji; Ahad Ghaemi

Volume 9, Issue 1 , Winter 2020, , Pages 47-67

http://dx.doi.org/10.22050/ijogst.2019.186102.1506

Abstract
  Separation of nitrogen from a gaseous mixture is required for many industrial processes. In this study, the adsorption of nitrogen on zeolite 4A was investigated in terms of different adsorption isotherm models and kinetics. An increase in the initial pressure from 1 to 9 bar increases the amount of ...  Read More

Petroleum Engineering
120. Salinity Effect on the Surfactant Critical Micelle Concentration through Surface Tension Measurement

Naser Akhlaghi; Siavash Riahi

Volume 8, Issue 4 , Autumn 2019, , Pages 50-63

http://dx.doi.org/10.22050/ijogst.2019.156537.1481

Abstract
  One of the tertiary methods for enhanced oil recovery (EOR) is the injection of chemicals into oil reservoirs, and surface active agents (surfactants) are among the most used chemicals. Surfactants lead to increased oil production by decreasing interfacial tension (IFT) between oil and the injected water ...  Read More

121. Effect of Repeated Repair Metal Inert Gas Welding on Microstructural Properties, Corrosion Resistance, and Wear Behavior of 5083-H116 Aluminum Alloy

Mohammad Reza Zarghamian; Mansoor Farzam; Iman D Danaee; Hadi Eskandari

Volume 6, Issue 4 , Autumn 2017, , Pages 51-63

http://dx.doi.org/10.22050/ijogst.2017.53910

Abstract
  The effect of repeated repair welding, shielded with argon, on microstructural properties, corrosion resistance, and dry sliding wear behavior of aluminum alloy 5083/H116 were investigated. Samples were welded by metal inert gas welding method. 100% argon was used to protect fusion zone. Aluminum alloy ...  Read More

Chemical Engineering
122. The Effect of Different Electrodes on Humic Acid Removal by Electrocoagulation

Farhad Asgharyan; Mohammadreza Khosravi Nikou; Bagher Anvaripour; Iman Danaee

Volume 7, Issue 2 , Spring 2018, , Pages 52-63

http://dx.doi.org/10.22050/ijogst.2018.65739

Abstract
  The present study is about the reduction of humic acids (HA) by electrocoagulation (EC) method. Undesirable color, odor, taste, reacting with chlorine to produce toxic materials in water, and making a complex with heavy metal ions are some unfavorable environmental consequences of HA. Platinum and graphite ...  Read More

Petroleum Engineering – Production
123. A Numerical Simulation Study on the Kinetics of Asphaltene Particle Flocculation in a Two-dimensional Shear Flow

Hadi Bagherzadeh; Zahra Mansourpour; Bahram Dabir

Volume 8, Issue 2 , Spring 2019, , Pages 53-72

http://dx.doi.org/10.22050/ijogst.2018.142463.1468

Abstract
  In the current study, the kinetics of asphaltene particle flocculation is investigated under a shear flow through numerical simulation. The discrete element method (DEM) is coupled with computational fluid dynamics (CFD) to model the agglomeration and fragmentation processes. In addition, a coalescence ...  Read More

Petroleum Engineering
124. Improving Water-oil Relative Permeability Parameters Using New Synthesized Calcium Oxide and Commercial Silica Nanofluids

Yaser Ahmadi; Babak Aminshahidy

Volume 8, Issue 3 , Summer 2019, , Pages 58-72

http://dx.doi.org/10.22050/ijogst.2019.146641.1473

Abstract
  This paper addressed the application of new hydrophobic synthesized calcium oxide (CaO) and silicon dioxide (SiO2) nanofluids to low permeability carbonate porous media. Crude oil and plugs were selected from one of oil reservoirs in the west of Iran. The main goal of this paper is comparing the results ...  Read More

Petroleum Engineering
125. Comparing Two Methods of Neural Networks to Evaluate Dead Oil Viscosity

Meysam Dabiri-Atashbeyk; Mehdi Koolivand-salooki; Morteza Esfandyari; Mohsen Koulivand

Volume 7, Issue 1 , Winter 2018, , Pages 60-69

http://dx.doi.org/10.22050/ijogst.2017.70576.1373

Abstract
  Reservoir characterization and asset management require comprehensive information about formation fluids. In fact, it is not possible to find accurate solutions to many petroleum engineering problems without having accurate pressure-volume-temperature (PVT) data. Traditionally, fluid information has ...  Read More