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analytical-geochemistry
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Detailed analysis of the brine-rock interactions during low salinity water injection by a coupled geochemical-transport model
, Article Chemical Geology ; Volume 537 , 2020 ; Zivar, D ; Sharif University of Technology
Elsevier B.V
2020
Abstract
Enhanced Oil Recovery (EOR) methods have been widely used around the world to improve oil production from petroleum reservoirs. Recently, the injection of the low salinity/smart water has gained popularity among the EOR methods. Different mechanisms are believed to exist during low salinity/smart water injection, including dissolution, precipitation, and ion exchange at the rock surface. In this study, a coupled geochemical-transport model is presented for the detailed analysis and investigation of the interactions between brine, sandstone and carbonate rocks. The proposed model presents the coupling of a geochemical software (PHREEQC) and a species transport model. This coupled method makes...
Assessment of nitrate contamination in unsaturated zone of urban areas: the case study of Tehran, Iran
, Article Environmental Geology ; Volume 57, Issue 8 , 2009 , Pages 1785-1798 ; 09430105 (ISSN) ; Ataie Ashtiani, B ; Sharif University of Technology
2009
Abstract
Modeling fate of nitrogen in unsaturated and saturated zone is a complex process, which requires detailed geochemical data. Complexities of the process as well as data insufficiencies are two major issues, which make quantitative assessment of the problem more complicated. In this work, a lumped-parameter model (LPM) is proposed that has been evaluated for a data-limited case to study temporal and steady-state behavior of Nitrate and Ammonium in unsaturated zone. The concentration of components in the model are assumed as the depth-averaged concentrations, and dispersive fluxes have been neglected. The case study area is Tehran City aquifer, which is highly contaminated by domestic...