Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)
A comprehensive benchmark between two filter-based multiple-point simulation algorithms

M. Bavand Savadkoohi; B. Tokhmechi; E. Gloaguen; A.R. Arab-Amiri

Volume 10, Issue 1 , January 2019, , Pages 139-149


  Computer graphics offer various gadgets to enhance the reconstruction of high-order statistics that are not correctly addressed by the two-point statistics approaches. Almost all the newly developed multiple-point geostatistics (MPS) algorithms, to some extent, adapt these techniques to increase the ...  Read More

Estimation of geochemical elements using a hybrid neural network-Gustafson-Kessel algorithm

M. Jahangiri; Seyed R. Ghavami Riabi; B. Tokhmechi

Volume 9, Issue 2 , April 2018, , Pages 499-511


  Bearing in mind that lack of data is a common problem in the study of porphyry copper mining exploration, our goal was set to identify the hidden patterns within the data and to extend the information to the data-less areas. To do this, the combination of pattern recognition techniques has been used. ...  Read More

Evaluation of effective factors in window optimization of fry analysis to identify mineralization pattern: Case study of Bavanat region, Iran

R. Ghasemi; B. Tokhmechi; G. Borg

Volume 9, Issue 1 , January 2018, , Pages 195-208


  The known ore deposits and mineralization trends are important key exploration criteria in mineral exploration within a specific region. Fry analysis has conventionally been considered as a suitable method to determine the mineralization trends related to linear structures. Based upon literature sources, ...  Read More

Determination of constant coefficients of Bourgoyne and Young drilling rate model using a novel evolutionary algorithm

M. Anemangely; A. Ramezanzadeh; B. Tokhmechi

Volume 8, Issue 4 , October 2017, , Pages 693-702


  Achieving minimum cost and time in reservoir drilling requires evaluating the effects of the drilling parameters on the penetration rate and constructing a drilling rate estimator model. Several drilling rate models have been presented using the drilling parameters. Among these, the Bourgoyne and Young ...  Read More

Studying empirical correlation between drilling specific energy and geo-mechanical parameters in an oil field in SW Iran

M. Mohammadi Behboud; A. Ramezanzadeh; B. Tokhmechi

Volume 8, Issue 3 , July 2017, , Pages 393-401


  Multiplicity of the effective factors in drilling reflects the complexity of the interaction between rock mass and drilling bit, which is followed by the dependence of parameters and non-linear relationships between them. Rock mass or, in other words, the formation intended for drilling, as the drilling ...  Read More

Permeability upscaling in fractured reservoirs using different optimized mother wavelets at each level

R. Vahedi; B. Tokhmechi; M. Koneshloo

Volume 7, Issue 2 , July 2016, , Pages 239-250


  We use a multi-resolution analysis based on a wavelet transform to upscale a 3D fractured reservoir. This paper describes a 3D, single-phase, and black-oil geological model (GM) that is used to simulate naturally-fractured reservoirs. The absolute permeability and porosity of GM is upscaled by all the ...  Read More

The impact of poor cementing casing damage: A numerical simulation study

M. Hemmatian; B. Tokhmchi; V. Rasouli; R. Gholami

Volume 6, Issue 1 , January 2015, , Pages 41-53


  A good knowledge of the parameters causing casing damage is critically important due to vital role of casing during the life of a well. Cement sheath, which fills in the gap between the casing and wellbore wall, has a profound effect on the resistance of the casing against applied loads. Most of the ...  Read More

Application of Bayesian decision making tool in detecting oil-water contact in a carbonate reservoir

Amir Mollajan; Hossein Memarian; Behzad Tokhmechi

Volume 5, Issue 2 , July 2014, , Pages 91-97


  Detection of Oil-Water Contacts (OWCs) is one of the primary tasks before evaluation of reservoir’s hydrocarbon in place, determining net pay zones and suitable depths for perforation operation. This paper introduces Bayesian decision making tool as an effective technique in OWC detecting using ...  Read More

Formation interface detection using Gamma Ray log: A novel approach

Mostafa Javid; Behzad Tokhmechi

Volume 3, Issue 1 , January 2012, , Pages 41-50


  There are two methods for identifying formation interface in oil wells: core analysis, which is a precise approach but costly and time consuming, and well logs analysis, which petrophysists perform, which is subjective and not completely reliable. In this paper, a novel coupled method was proposed to ...  Read More

Limestone chemical components estimation using image processing and pattern recognition techniques

F. Khorram; H. Memarian; B. Tokhmechi; H. Soltanian-zadeh

Volume 2, Issue 2 , July 2011, , Pages 126-135


  In this study based on image analysis, an ore grade estimation model was developed. The study was performed at a limestone mine in central Iran. The samples were collected from different parts of the mine and crushed in size from 2.58 cm down to 15 cm. The images of the samples were taken in appropriate ...  Read More