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    The simultaneous determination of archie's parameters by application of modified genetic algorithm and hdp methods: A comparison with current methods via two case studies

    , Article Petroleum Science and Technology ; Volume 30, Issue 1 , Mar , 2011 , Pages 54-63 ; 10916466 (ISSN) Godarzi, A. A ; Najafi, I ; Najafi, A ; Ghazanfari, M. H ; Sharif University of Technology
    Although different procedures have been proposed to calculate the parameters of Archie's (1942) equation, most of them suffer from lack of accuracy because these are not solved simultaneously In this article, by applying two novel methods, a modified genetic algorithm (MGA) and homogeneous distribution of parameters (HDP), the above-mentioned unknown parameters were determined simultaneously. Furthermore, for two case studies using two data sets from Permian Glerito and Permian Clearfork reservoirs, a comparison is made between other methods (e.g., traditional graphical method and SmnaM; Frailey et al., 2001) and the proposed methods that demonstrated the greater accuracy of the two newly... 

    Technology planning system for the Iranian petroleum industry: lessons learned from sanctions

    , Article Technological Forecasting and Social Change ; Volume 122 , 2017 , Pages 170-178 ; 00401625 (ISSN) Hoshdar, F ; Ghazinoory, S ; Arasti, M ; Fassihi, S. F ; Sharif University of Technology
    Iran's petroleum industry is facing challenges including maturity of hydrocarbon fields, growing population of the nation that demands additional revenues from petroleum exports, and international economic sanctions that have limited access to technology sources. Restrictions from international technology providers have led managers of the industry enterprises to try to develop their needed technologies inside the country. The Ministry of Petroleum has supervised this and as a result, a technology planning systems has been developed and implemented since 2009. In this paper, an overview of the Iranian petroleum industry is provided from a technology planning perspective. The focus has been... 

    Effect of operation conditions on the catalytic performance of the Co/Mn/TiO2 catalyst for conversion of synthesis gas to light olefins

    , Article Scientia Iranica ; Volume 17, Issue 2 C , November , 2010 , Pages 168-176 ; 10263098 (ISSN) Shayegh, F ; Ghotbi, C ; Bozorgmehry Boozarjomehry, R ; Rashtchian, D ; Sharif University of Technology
    The effect of operation variables, such as the H2/CO molar feed ratio, gas hourly space velocity (GHSV), temperature, and pressure, on the catalytic performance of the Co/Mn/TiO2 catalyst prepared at the Research Institute of the Petroleum Industry (RIPI) was investigated, and optimum reactor conditions were obtained to produce the maximum amount of light olefins. The catalyst was prepared by co-precipitation of Co and Mn phases in the presence of commercial TiO2 with maximum selectivity for ethylene and propylene production. It was found that the [H2]/[CO]=2/1, space velocity (GHSV) of 1800 h-1, 280°C temperature and 4 bar pressure were optimum operating conditions for the modified catalyst...