Research Paper
2. An Experimental Study on the Operational Factors Affecting the Oil Content of Wax during Dewaxing Process: Adopting a DOE Method

Mohammad Hosein Eghbali; Ali Reza Soleimani Nazar; Touraj Tavakoli

Volume 2, Issue 1 , Winter 2013, Pages 1-8

http://dx.doi.org/10.22050/ijogst.2013.3033

Abstract
  The oil content of the wax produced in a dewaxing process is the key economic parameter that should be reduced as much as possible. Some factors such as the type of solvents, cooling rate, temperature, and solvent to oil ratio influence the dewaxing process. Due to the fact that crude oil differs from ...  Read More

Research Paper
3. Investigating the Effects of Heterogeneity, Injection Rate, and Water Influx on GAGD EOR in Naturally Fractured Reservoirs

Misagh Delalat; Riyaz Kharrat

Volume 2, Issue 1 , Winter 2013, Pages 9-21

http://dx.doi.org/10.22050/ijogst.2013.3034

Abstract
  The gas-assisted gravity drainage (GAGD) process is designed and practiced based on gravity drainage idea and uses the advantage of density difference between injected CO2 and reservoir oil. In this work, one of Iran western oilfields was selected as a case study and a sector model was simulated based ...  Read More

Research Paper
4. A Least Squares Approach to Estimating the Average Reservoir Pressure

Kambiz Razminia; Abdolnabi Hashemi; Abdolhassan Razminia

Volume 2, Issue 1 , Winter 2013, Pages 22-32

http://dx.doi.org/10.22050/ijogst.2013.3035

Abstract
  Least squares method (LSM) is an accurate and rapid method for solving some analytical and numerical problems. This method can be used to estimate the average reservoir pressure in well test analysis. In fact, it may be employed to estimate parameters such as permeability (k) and pore volume (Vp). Regarding ...  Read More

5. A New Method of Earlier Kick Assessment Using ANFIS

Fatemeh Deregeh; Milad Karimian; Hossein Nezmabadi-Pour

Volume 2, Issue 1 , Winter 2013, Pages 33-41

http://dx.doi.org/10.22050/ijogst.2013.3036

Abstract
  The late detection of the kick (the entrance of underground fluids into oil wells) leads to oil well blowouts. It causes human life loss and imposes a great deal of expenses on the petroleum industry. This paper presents the application of adaptive neuro-fuzzy inference system designed for an earlier ...  Read More

Research Paper
6. A Novel Combinatorial Approach to Discrete Fracture Network Modeling in Heterogeneous Media

Saeed Balouchi; Siyamak Moradi; Mohsen Masihi; Ali Erfaninia

Volume 2, Issue 1 , Winter 2013, Pages 42-56

http://dx.doi.org/10.22050/ijogst.2013.3037

Abstract
  Fractured reservoirs contain about 85 and 90 percent of oil and gas resources respectively in Iran. A comprehensive study and investigation of fractures as the main factor affecting fluid flow or perhaps barrier seems necessary for reservoir development studies. High degrees of heterogeneity and sparseness ...  Read More

Research Paper
7. Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films

Samaneh Rezaee; Gholamreza Rashed; Mohammad Ali Golozar

Volume 2, Issue 1 , Winter 2013, Pages 57-70

http://dx.doi.org/10.22050/ijogst.2013.3038

Abstract
  The aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgel coatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 N H2SO4 environment. The influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and 20, on ...  Read More