Research Paper Chemical Engineering – Gas Processing and Transmission
1. Removal of H2S and Mercaptan from Outlet Gases of Kermanshah Refinery Using Modified Adsorbents (Bentonite and Sludge)

Omid Jalalvandi; Firooz Kheradmand; Farhad Salimi; Farhad Golmohammadi

Volume 8, Issue 2 , Spring 2019, Pages 1-14

http://dx.doi.org/10.22050/ijogst.2018.110934.1429

Abstract
  In this work, adsorbents, namely bentonite and sludge, modified by iron and copper were used to remove the H2S and mercaptan from Kermanshah refinery. The used adsorbents are inexpensive materials, which substantially decrease the operational costs. The structure of the adsorbents was analyzed using ...  Read More

Research Paper Petroleum Engineering – Exploration
2. Amplitude Variation with Offset Inversion Analysis in One of the Western Oilfields of the Persian Gulf

Benyamin Khadem; Abdolrahim Javaherian

Volume 8, Issue 2 , Spring 2019, Pages 15-33

http://dx.doi.org/10.22050/ijogst.2018.125135.1444

Abstract
  Reservoir characterization has a leading role in the reservoir geophysics and reservoir management. Since the interests of the reservoir geophysics and reservoir managements are the elastic properties and reservoir properties of the subsurface rock for their purposes, a robust method is required for ...  Read More

Research Paper Petroleum Engineering – Reservoir
3. Occurrence and Distribution of Chrysene and its Derivatives in Crude Oils and Source Rock Extracts from Niger Delta, Nigeria

Abiodun Ogbesejana; Oluwadayo Sonibare; Zhong Ningning; Oluwasesan Bello

Volume 8, Issue 2 , Spring 2019, Pages 34-52

http://dx.doi.org/10.22050/ijogst.2018.128598.1454

Abstract
  Crude oils and source rocks from the northern and offshore Niger Delta basin, Nigeria, have been characterized by gas chromatography-mass spectrometry in terms of their origin and thermal maturity based on the distribution of chrysene and its derivatives. The crude oils and source rocks were characterized ...  Read More

Research Paper Petroleum Engineering – Production
4. 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

Research Paper Petroleum Engineering – Reservoir
5. Characterization of Liquid Bridge in Gas/Oil Gravity Drainage in Fractured Reservoirs

Behrouz Harimi; Mohsen Masihi; Mohammad Hosein Ghazanfari

Volume 8, Issue 2 , Spring 2019, Pages 73-91

http://dx.doi.org/10.22050/ijogst.2018.140366.1465

Abstract
  Gravity drainage is the main mechanism which controls the oil recovery from fractured reservoirs in both gas-cap drive and gas injection processes. The liquid bridge formed between two adjacent matrix blocks is responsible for capillary continuity phenomenon. The accurate determination of gas-liquid ...  Read More

Research Paper Mechanical Engineering – Applied Design
6. Investigating the Effectiveness of a Composite Patch on Repairing Pipes Subjected to Circumferential Cracks under Combined Loadings

Gholamreza Rashed; Hadi Eskandari; Ardeshir Savari

Volume 8, Issue 2 , Spring 2019, Pages 92-106

http://dx.doi.org/10.22050/ijogst.2018.146737.1474

Abstract
  The purpose of this study is to investigate bending moment and the axial load capacity of a pressurized pipe suffering from a through-wall circumferential crack repaired by a composite sleeve. The three-dimensional finite element method (FEM) was adopted to compute the results, and the failure assessment ...  Read More

Research Paper Chemical Engineering – Gas Processing and Transmission
7. The Synthesis and Implementation of Pebax/PEG 400/NH2-MIL125 Nanocomposite Membranes to Separate CO2/CH4

Cyrus Fallahi; Sadegh Moradi; Reza Masayebi Behbahani

Volume 8, Issue 2 , Spring 2019, Pages 107-127

http://dx.doi.org/10.22050/ijogst.2019.171324.1494

Abstract
  In the present study, the permeabilities of CO2 and CH4 in terms of ideal and actual CO2/CH4 selectivity were investigated through the synthesized membranes of poly (ether-block-amide) (Pebax 1657) accompanied with poly (ethylene glycol) (PEG 400) and NH2-MIL125 nanoparticles. NH2-MIL125 nanofillers ...  Read More