Research Paper
2. Influence of Surfactant Type, Surfactant Concentration, and Salinity on Interfacial Tension of a Brine/Live Oil/Surfactant Fluid System: A Case Study of Iranian Asmari Oil Reservoir

Mohammad Saki; Ali Reza Khaz'al

Volume 6, Issue 1 , Winter 2017, Pages 1-16

http://dx.doi.org/10.22050/ijogst.2017.44341

Abstract
  The chemical surfactant flooding can mobilize the trapped oil by lowering the interfacial tension between oil and brine and in some cases altering the reservoir rock wettability. In this work, the effect of surfactants on oil/brine interfacial tension was experimentally investigated. First, the effect ...  Read More

Research Paper
3. Investigation of Performance of Ni / Clinoptilolite Nanoadsorbents in Desulfurization of Gas Oil: Experimental Design and Modeling

Seyed Ali Hosseini; Sirus Nouri; Sajad Hashemi; Mansor Akbari

Volume 6, Issue 1 , Winter 2017, Pages 13-25

http://dx.doi.org/10.22050/ijogst.2017.44344

Abstract
  The removal of sulfur compounds from petroleum is extremely necessary for industrial and environmental reasons. Sulfur in transportation fuels is a major air pollution source. In this work, the efficiency of nanostructured Ni-clinoptilolite adsorbent was investigated in the removal of sulfur from gas ...  Read More

Research Paper
4. 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

Research Paper
5. An Improvement in Cation Exchange Capacity Estimation and Water Saturation Calculation in Shaly Layers for One of Iranian Oil Fields

Masoumeh Bashiri; Mosayyeb Kamari; Ghassem Zargar

Volume 6, Issue 1 , Winter 2017, Pages 45-62

http://dx.doi.org/10.22050/ijogst.2017.44376

Abstract
  Water saturation and cation exchange capacity are the most significant parameters used to calculate a hydrocarbon zone potential. In clean formations, by applying the famous Archie model, which assumes that in the formation the only electric conductor is the formation water, the water saturation can ...  Read More

Research Paper
6. Nanocomposite Coating Based on Thermoplastic Acrylic Resin and Montmorillonite Clay: Preparation and Corrosion Prevention Properties

Mohammadreza Shishesaz; Davood Jafari; davood zaarei; Iman Danaee

Volume 6, Issue 1 , Winter 2017, Pages 63-76

http://dx.doi.org/10.22050/ijogst.2017.44382

Abstract
  Different amounts of nanoclay were incorporated into the acrylic resin matrix at 0, 1, 3, and 5 wt.% loadings. The coatings were applied on low carbon steel plates. Optical microscopy, sedimentation test, transmission electron microscopy, and X-ray diffraction were employed to investigate the dispersion ...  Read More

Research Paper
7. A Self-Reconstructing Algorithm for Single and Multiple-Sensor Fault Isolation Based on Auto-Associative Neural Networks

Hamidreza Mousavi; Mehdi Shahbazian; Nosrat Moradi

Volume 6, Issue 1 , Winter 2017, Pages 77-92

http://dx.doi.org/10.22050/ijogst.2017.44384

Abstract
  Recently different approaches have been developed in the field of sensor fault diagnostics based on Auto-Associative Neural Network (AANN). In this paper we present a novel algorithm called Self reconstructing Auto-Associative Neural Network (S-AANN) which is able to detect and isolate single faulty ...  Read More