Research Paper
2. An Efficient Method for Determining Capillary Pressure and Relative Permeability Curves from Spontaneous Imbibition Data

Mojtaba Ghaedi; Zoltán E. Heinemann; Mohsen Masihi; Mohammad Hossein Ghazanfari

Volume 4, Issue 3 , Summer 2015, Pages 1-17

http://dx.doi.org/10.22050/ijogst.2015.10364

Abstract
  In this paper, a very efficient method, called single matrix block analyzer (SMBA), has been developed to determine relative permeability and capillary pressure curves from spontaneous imbibition (SI) data. SMBA mimics realistically the SI tests by appropriate boundary conditions modeling. In the proposed ...  Read More

Research Paper
3. Toward a Thorough Approach to Predicting Klinkenberg Permeability in a Tight Gas Reservoir: A Comparative Study

Sadegh Baziar; Mohammad Mobin Gafoori; Seyed Mehdi Mohaimenian Pour; Majid Nabi Bidhendi; Reza Hajiani

Volume 4, Issue 3 , Summer 2015, Pages 18-36

http://dx.doi.org/10.22050/ijogst.2015.10365

Abstract
  Klinkenberg permeability is an important parameter in tight gas reservoirs. There are conventional methods for determining it, but these methods depend on core permeability. Cores are few in number, but well logs are usually accessible for all wells and provide continuous information. In this regard, ...  Read More

Research Paper
4. Determination of Pore Pressure from Sonic Log: a Case Study on One of Iran Carbonate Reservoir Rocks

Morteza Azadpour; Navid Shad Manaman

Volume 4, Issue 3 , Summer 2015, Pages 37-50

http://dx.doi.org/10.22050/ijogst.2015.10366

Abstract
  Pore pressureis defined as the pressure of the fluid inside the pore space of the formation, which is also known as the formation pressure. When the pore pressure is higher than hydrostatic pressure, it is referred to as overpressure. Knowledge of this pressure is essential for cost-effective drilling, ...  Read More

5. Solubility of Methane, Ethane, and Propane in Pure Water Using New Binary Interaction Parameters

Masoud Behrouz; Masoud Aghajani

Volume 4, Issue 3 , Summer 2015, Pages 51-59

http://dx.doi.org/10.22050/ijogst.2015.10375

Abstract
  Solubility of hydrocarbons in water is important due to ecological concerns and new restrictions on the existence of organic pollutants in water streams. Also, the creation of a thermodynamic model has required an advanced study of the phase equilibrium between water (as a basis for the widest spread ...  Read More

Research Paper
6. A Decision Support System (DSS) to Select the Premier Fuel to Develop in the Value Chain of Natural Gas

Ahmad Mousaei; Mohammad Ali Hatefi

Volume 4, Issue 3 , Summer 2015, Pages 60-76

http://dx.doi.org/10.22050/ijogst.2015.10376

Abstract
  A value chain is a series of events that takes a raw material and with each step adds value to it. Global interest in the application of natural gas (NG) in production and transportation has grown dramatically, representing a long-term, low-cost, domestic, and secure alternative to petroleum-based fuels. ...  Read More

Research Paper
7. A CFD Simulation of the Parameters Affecting the Performance of Downhole De-oiling Hydrocyclone

Seyyed Mohsen Hosseini; Khalil Shahbazi; Mohammad Reza Khosravi Nikou

Volume 4, Issue 3 , Summer 2015, Pages 77-93

http://dx.doi.org/10.22050/ijogst.2014.10377

Abstract
  Among the all parameters affecting the performance of a downhole de-oiling hydrocyclone, the investigation of internal flow field deserves more attempts especially in the petroleum industry. In this study, the effects of inlet flow rate, inlet oil volume fraction, and oil droplet diameter on the separation ...  Read More