Research Paper Petroleum Engineering
1. Chemometrics-enhanced Classification of Source Rock Samples Using their Bulk Geochemical Data: Southern Persian Gulf Basin

Majid Alipour; Bahram Alizadeh; Scott Ramos; Behzad Khani; Shohreh Mirzaie

Volume 8, Issue 4 , Autumn 2019, Pages 1-17

http://dx.doi.org/10.22050/ijogst.2019.142950.1469

Abstract
  Chemometric methods can enhance geochemical interpretations, especially when working with large datasets. With this aim, exploratory hierarchical cluster analysis (HCA) and principal component analysis (PCA) methods are used herein to study the bulk pyrolysis parameters of 534 samples from the Persian ...  Read More

Research Paper Petroleum Engineering
2. Foam Application in Fractured Carbonate Reservoirs: A Simulation Study

Ahmed Zoeir; Mohammad Chahardowli; Mohammad Simjoo

Volume 8, Issue 4 , Autumn 2019, Pages 18-34

http://dx.doi.org/10.22050/ijogst.2019.147229.1476

Abstract
  Fractured carbonate reservoirs account for 25% of world’s total oil resources and for 90% of Iranian oil reserves. Since calcite and dolomite minerals are oil wet, gas oil gravity drainage (GOGD) is known as the most influencing production mechanism. The most important issue within gas injection ...  Read More

Research Paper Petroleum Engineering
3. Chemical Modification of Lignite and Investigation of its Properties in Controlling Fluid Loss of Oil Well Cement Slurries

Ali Nemati Kharat; Ali akbar Ghaffari

Volume 8, Issue 4 , Autumn 2019, Pages 35-49

http://dx.doi.org/10.22050/ijogst.2019.128036.1457

Abstract
  The aim of this research was to produce a convenient additive for enhancing the properties, especially the fluid loss, of oil well cement slurries. In this regard, a variety of drilling/cementing chemical additives known as fluid loss controllers were prepared through derivatization and chemical modification ...  Read More

Research Paper Petroleum Engineering
4. 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

Research Paper Chemical Engineering
5. An Investigation into the Effect of Hydrotalcite Calcination Temperature on the Catalytic Performance of Mesoporous Ni-MgO-Al2O3 Catalyst in the Combined Steam and Dry Reforming of Methane

Gholamreza Roohollahi; Mohammadreza Ehsani

Volume 8, Issue 4 , Autumn 2019, Pages 64-84

http://dx.doi.org/10.22050/ijogst.2018.132105.1456

Abstract
  Several mesoporous nickel-based catalysts with MgO-Al2O3 as the catalyst support were prepared using a co-precipitation method at a constant pH. The supports were prepared from the decomposition of an Mg-Al hydrotalcite-like structure which had already been prepared with Mg/Al=1. Prior to impregnating ...  Read More

Research Paper Chemical Engineering
6. Prediction of Dispersed Phase Holdup in the Kühni Extraction Column Using a New Experimental Correlation and Artificial Neural Network

Mohsen Keshavarz; Ahad Ghaemi; Mansour Shirvani; Ebrahim Arab

Volume 8, Issue 4 , Autumn 2019, Pages 85-105

http://dx.doi.org/10.22050/ijogst.2018.143946.1472

Abstract
  In this work, the dispersed phase holdup in a Kühni extraction column is predicted using intelligent methods and a new empirical correlation. Intelligent techniques, including multilayer perceptron and radial basis functions network are used in the prediction of the dispersed phase holdup. To design ...  Read More

Research Paper Energy Systems Engineering
7. Influence of Pipeline Operating Pressure on Value Setting of Automatic Control Valves at Different Pressure Drop Rates

Mehdi Mahmoodi; Mofid Gorji Bandpy

Volume 8, Issue 4 , Autumn 2019, Pages 106-121

http://dx.doi.org/10.22050/ijogst.2018.105249.1420

Abstract
  When a natural gas pipeline ruptures, the adjacent upstream and downstream automatic control valves (ACV) should close quickly to prevent leakage or explosion. The differential pressure set point (DPS) at each valve location is the main criteria for value setting in ACV actions. If the DPS is not properly ...  Read More