Research Paper Petroleum Engineering
2. Capability of the Stochastic Seismic Inversion in Detecting the Thin Beds: a Case Study at One of the Persian Gulf Oilfields

Mostafa Zare; Abbdolrahim Javaherian; Mehdi Shabani

Volume 7, Issue 3 , Summer 2018, Pages 1-17

http://dx.doi.org/10.22050/ijogst.2018.120334.1439

Abstract
  The aim of seismic inversion is mapping all of the subsurface structures from seismic data. Due to the band-limited nature of the seismic data, it is difficult to find a unique solution for seismic inversion. Deterministic methods of seismic inversion are based on try and error techniques and provide ...  Read More

Research Paper Petroleum Engineering
3. Effects of pH and Temperature on Oilfield Scale Formation

Jaber Azizi; Seyed Reza Shadizadeh; Abbas Khaksar Manshad; Naghi Jadidi

Volume 7, Issue 3 , Summer 2018, Pages 18-31

http://dx.doi.org/10.22050/ijogst.2017.58038.1350

Abstract
  Water flooding is one of the most influential methods for pressure maintenance and enhanced oil recovery. However, water flooding is likely to develop the formation of oilfield scale. Scale formation in reservoirs, due to the mixing of injection water and formation water, could cause formation damage ...  Read More

Research Paper Mechanical Engineering
4. Advanced Analysis of Dew Point Control Unit of Hybrid Refrigeration Systems in Gas Refineries

Mahmoud Afshar; Hamid Rad

Volume 7, Issue 3 , Summer 2018, Pages 32-52

http://dx.doi.org/10.22050/ijogst.2017.60794.1376

Abstract
  In this paper, an advanced analysis of a novel hybrid compression-absorption refrigeration system (HCARS) for natural gas dew point control unit in a gas refinery is presented. This unit separates the heavy hydrocarbon molecules in the natural gas, which is traditionally carried out by natural gas cooling ...  Read More

Research Paper Chemical Engineering
5. Prediction of the Products Yield of Delayed Coking for Iranian Vacuum Residues

Farshad Torabi Esfahani; Javad Ivakpour; Mohammadreza Ehsani

Volume 7, Issue 3 , Summer 2018, Pages 53-64

http://dx.doi.org/10.22050/ijogst.2017.102019.1415

Abstract
  In this work, new correlations are proposed to predict the products yield of delayed coking as a function of CCR and temperature based on the experimental results. For this purpose, selected Iranian vacuum residues with Conradson carbon residue (CCR) values between 13.40-22.19 wt.% were heated at a 10 ...  Read More

Research Paper Geophysics
6. Using a novel method for random noise reduction of seismic records

Majid Bagheri; Mohammad Ali Riahi

Volume 7, Issue 3 , Summer 2018, Pages 65-72

http://dx.doi.org/10.22050/ijogst.2018.75178.1381

Abstract
  Random or incoherent noise is an important type of seismic noise, which can seriously affect the quality of the data. Therefore, decreasing the level of this category of noises is necessary for increasing the signal-to-noise ratio (SNR) of seismic records. Random noises and other events overlap each ...  Read More

Research Paper Petroleum Engineering – Drilling
7. Application of an Adaptive Neuro-fuzzy Inference System and Mathematical Rate of Penetration Models to Predicting Drilling Rate

Hossein Yavari; Mohammad Sabah; Rassoul Khosravanian; David. A Wood

Volume 7, Issue 3 , Summer 2018, Pages 73-100

http://dx.doi.org/10.22050/ijogst.2018.83374.1391

Abstract
  The rate of penetration (ROP) is one of the vital parameters which directly affects the drilling time and costs. There are various parameters that influence the drilling rate; they include weight on bit, rotational speed, mud weight, bit type, formation type, and bit hydraulic. Several approaches, including ...  Read More