Design and Evaluation of a Reliable Switching Method for Network-on-Chips

, M.Sc. Thesis Sharif University of Technology Allivand, Yassin (Author) ; Miremadi, Ghassem (Supervisor)

Abstract

Growth in the number of transistors on a single die has made Network-on-Chips more vulnerable to transient faults such as Crosstalks, SEUs and MBUs. The aim of this thesis is to evaluate the effects of virtual channel structures on the performance and the power consumptions of NoCs in the presence of transient faults. Evaluations have been carried out by different switch architectures and experimental conditions, i.e., different traffic and fault injection rates. In this regard, we have measured the power and latency of the switch both in different buffer allocation mechanisms and different switching methods. The evaluated switching methods in this work vary from Virtual Cut through (VCT) to...

Low salinity water injectionat different reservoir rocks: Similarities and differences

, Article Special Topics and Reviews in Porous Media ; Volume 7, Issue 1 , 2016 , Pages 87-97 ; 21514798 (ISSN) Hassani, K ; Rostami, B ; Ayatollahi, S ; Yassin, M. R ; Sharif University of Technology

Begell House Inc 2016

Abstract

A literature review of laboratory and field scale studies on low salinity water (LSW) injection showed that the salinity and composition of injected water can have a significant impact on oil recovery. Historically, extensive research has been completed to understand the mechanisms and factors affecting LSW injection. However, although numerous mechanisms have been proposed to describe the interactions in the target process, none have been widely accepted. In this study, waterflooding tests were used to investigate the advantages, disadvantages, and effect of LSW injection. In laboratory tests, two different brines and crude oil of one of Iran's southern reservoirs were used to assess the...

Prediction of Surfactant Retention in Porous Media: A Robust Modeling Approach

, Article Journal of Dispersion Science and Technology ; Vol. 35, issue. 10 , Sep , 2014 , p. 1407-1418 Yassin, M. R ; Arabloo, M ; Shokrollahi, A ; Mohammadi, A. H ; Sharif University of Technology

2014

Abstract

Demands for hydrocarbon production have been increasing in recent decades. As a tertiary production processes, chemical flooding is one of the effective technologies to increase oil recovery of hydrocarbon reservoirs. Retention of surfactants is one of the key parameters affecting the performance and economy of a chemical flooding process. The main parameters contribute to surfactant retention are mineralogy of rock, surfactant structure, pH, salinity, acidity of the oil, microemulsion viscosity, co-solvent concentration, and mobility. Despite various theoretical studies carried out so far, a comprehensive and reliable predictive model for surfactant retention is still found lacking. In this...

A new approach to characterize the performance of heavy oil recovery due to various gas injection

, Article International Journal of Multiphase Flow ; 2017 ; 03019322 (ISSN) Rostami, B ; Pourafshary, P ; Fathollahi, A ; Yassin, M. R ; Hassani, K ; Khosravi, M ; Mohammadifard, M ; Dangkooban, A ; Sharif University of Technology

Elsevier Ltd 2017

Abstract

The performance of CO2 injection into a semi-heavy oil reservoir was investigated at reservoir conditions, using highly permeable sandstone in a complete series of PVT tests and coreflooding experiments. Analysis of involved parameters such as: injection rate, injectant type and reservoir pressure were also considered. Oil viscosity reduction and oil swelling are the most influential mechanisms of enhanced oil recovery in this process. The results demonstrated that CO2 injection would decrease the interfacial tension for the high permeable medium in the absence of capillarity, but this reduction may not improve the recovery drastically. One of the main important aspects of this work is the...

A new approach to characterize the performance of heavy oil recovery due to various gas injection

, Article International Journal of Multiphase Flow ; Volume 99 , 2018 , Pages 273-283 ; 03019322 (ISSN) Rostami, B ; Pourafshary, P ; Fathollahi, A ; Yassin, M. R ; Hassani, K ; Khosravi, M ; Mohammadifard, M ; Dangkooban, A ; Sharif University of Technology

Elsevier Ltd 2018

Abstract

The performance of CO2 injection into a semi-heavy oil reservoir was investigated at reservoir conditions, using highly permeable sandstone in a complete series of PVT tests and coreflooding experiments. Analysis of involved parameters such as: injection rate, injectant type and reservoir pressure were also considered. Oil viscosity reduction and oil swelling are the most influential mechanisms of enhanced oil recovery in this process. The results demonstrated that CO2 injection would decrease the interfacial tension for the high permeable medium in the absence of capillarity, but this reduction may not improve the recovery drastically. One of the main important aspects of this work is the...

Laboratory Investigation of Rock Wettability and Interfacial Tension Effects on Relative Permeability, a Quantitative Study

, M.Sc. Thesis Sharif University of Technology Yassin, Mahmoud Reza (Author) ; Taghikhani, Vahid (Supervisor) ; Ayatollahi, Shahab (Co-Advisor) ; Rostami, Behzad (Co-Advisor)

Abstract

About 20% of total oil in the world is reserved in fractured reservoirs and there is also more than 60% of remained oil in the world in these reservoirs. But increasing recovery factor and production from this type of reservoirs was not very successful. After water flooding process most of the oil remains in the reservoir. The amount of remained oil is much more specially in fractured reservoirs. Surfactant flooding in one of the well-known enhanced oil recovery methods for reduction of interfacial tension between fluids to decrease capillary forces that cause less oil trapping and higher oil recovery. But a comprehensive and accurate understanding of the mechanism of this process and...