Research Paper
2. Separating Well Log Data to Train Support Vector Machines for Lithology Prediction in a Heterogeneous Carbonate Reservoir

Mohammad Ali Sebtosheikh; Reza Motafakkerfard; Mohammad Ali Riahi; Siyamak Moradi

Volume 4, Issue 2 , Spring 2015, Pages 1-14

http://dx.doi.org/10.22050/ijogst.2015.9588

Abstract
  The prediction of lithology is necessary in all areas of petroleum engineering. This means that to design a project in any branch of petroleum engineering, the lithology must be well known. Support vector machines (SVM’s) use an analytical approach to classification based on statistical learning ...  Read More

Research Paper
3. Evaluation of the Effects of Nanoclay Addition on the Corrosion Resistance of Bituminous Coating

Hamid Reza Zamanizadeh; Mohammad Reza Shishesaz; Iman Danaee; Davood Zaarei

Volume 4, Issue 2 , Spring 2015, Pages 15-26

http://dx.doi.org/10.22050/ijogst.2015.9590

Abstract
  In this study, the corrosion resistance of a bituminous coating reinforced with different ratios of nanoclay pigment was studied. To make nanocomposite coatings, 2, 3, and 4 wt.% of clay (Cloisite Na+) were incorporated into water emulsified bitumen. The coatings were applied to steel 37. Optical microscopy ...  Read More

Research Paper
4. 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

Research Paper
6. Comparison of Simulated Annealing, Genetic, and Tabu Search Algorithms for Fracture Network Modeling

Saeed Mahmoodpour; Mohsen Masihi; Sajjad Gholinejhad

Volume 4, Issue 2 , Spring 2015, Pages 50-67

http://dx.doi.org/10.22050/ijogst.2015.9592

Abstract
  The mathematical modeling of fracture networks is critical for the exploration and development of natural resources. Fractures can help the production of petroleum, water, and geothermal energy. They also greatly influence the drainage and production of methane gas from coal beds. Orientation and spatial ...  Read More

7. Organizational Silence, from Roots to Solutions: A Case Study in Iran Petroleum Industry

Mehdi Afkhami Ardakani; Ehsan Mehrabanfar

Volume 4, Issue 2 , Spring 2015, Pages 68-83

http://dx.doi.org/10.22050/ijogst.2015.9593

Abstract
  Organizational silence is defined as the lack of effective interactions among staff and it stands opposite to the concept of organizational voice. In the present research, the purpose is to measure the silence behavior among the Research Institute of Petroleum Industry (RIPI) staff before and after the ...  Read More