Research Paper
2. A Laboratory Investigation into Wettability Alteration of Carbonate Rock by Surfactants: The Effect of Salinity, pH, and Surfactant Concentration

Mohsen Seid Mohammadi; Jamshid Moghadasi; Amin Kordestany

Volume 3, Issue 3 , Summer 2014, Pages 1-10

http://dx.doi.org/10.22050/ijogst.2014.6617

Abstract
  Wettability alteration is an important method for increasing oil recovery from oil-wet carbonate reservoirs. Chemical agents like surfactants are known as wettability modifiers in carbonate systems. Oil can be recovered from initially oil-wet carbonate reservoirs by wettability alteration from oil-wet ...  Read More

3. Identifying Flow Units Using an Artificial Neural Network Approach Optimized by the Imperialist Competitive Algorithm

Seyyed Hossein Hosseini Bidgoli; Ghasem Zargar; Mohammad Ali Riahi

Volume 3, Issue 3 , Summer 2014, Pages 11-25

http://dx.doi.org/10.22050/ijogst.2014.6618

Abstract
  The spatial distribution of petrophysical properties within the reservoirs is one of the most important factors in reservoir characterization. Flow units are the continuous body over a specific reservoir volume within which the geological and petrophysical properties are the same. Accordingly, an accurate ...  Read More

Research Paper
4. 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

Research Paper
5. Development of New Potassium Carbonate Sorbent for CO2 Capture under Real Flue Gas Conditions

Javad Esmaili; Mohammad Reza Ehsani

Volume 3, Issue 3 , Summer 2014, Pages 39-46

http://dx.doi.org/10.22050/ijogst.2014.6620

Abstract
  In this paper, the development of a new potassium carbonateon alumina support sorbent prepared by impregnating K2CO3 with an industrial grade of Al2O3 support was investigated. The CO2 capture capacity was measured using real flue gas with 8% CO2 and 12% H2O in a fixed-bed reactor at a temperature of ...  Read More

6. The Prediction of Surface Tension of Ternary Mixtures at Different Temperatures Using Artificial Neural Networks

Ali Khazaei; Hossein Parhizgar; Mohammad Reza Dehghani

Volume 3, Issue 3 , Summer 2014, Pages 47-61

http://dx.doi.org/10.22050/ijogst.2014.6621

Abstract
  In this work, artificial neural network (ANN) has been employed to propose a practical model for predicting the surface tension of multi-component mixtures. In order to develop a reliable model based on the ANN, a comprehensive experimental data set including 15 ternary liquid mixtures at different temperatures ...  Read More

Research Paper
7. A New Method for Multisensor Data Fusion Based on Wavelet Transform in a Chemical Plant

Karim Salahshoor; Mohammad Ghesmat; Mohammad Reza Shishesaz

Volume 3, Issue 3 , Summer 2014, Pages 62-74

http://dx.doi.org/10.22050/ijogst.2014.6622

Abstract
  This paper presents a new multi-sensor data fusion method based on the combination of wavelet transform (WT) and extended Kalman filter (EKF). Input data are first filtered by a wavelet transform via Daubechies wavelet “db4” functions and the filtered data are then fused based on variance ...  Read More