vladimir V A shevnin | Moscow State University (original) (raw)
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Papers by vladimir V A shevnin
Near Surface 2010 - 16th EAGE European Meeting of Environmental and Engineering Geophysics, 2010
In area of study near the channel Valle del Fuerte in Sinaloa state, Mexico, geological and geoel... more In area of study near the channel Valle del Fuerte in Sinaloa state, Mexico, geological and geoelectrical characteristics of soil were measured in seven key areas. In each of seven key areas an electrical resistivity tomography (ERT) profile was fulfilled, three boreholes were made with soil samples collection in each borehole, filtration coefficients of soil, cation exchange capacity, porosity and grain size distribution, groundwater salinity and ionic content in water were determined. ERT data were interpreted and soil resistivity curves versus pore water salinity were measured. Joint analysis of all data obtained was performed to find correlations between them to create petrophysical model of soil. Verification of this model was performed by correlation between the same petrophysical parameters measured in laboratory and obtained from geophysical data.
2004 International Pipeline Conference, Volumes 1, 2, and 3, 2004
ABSTRACT
Summary Resistivity method is used extensively in environmental impact studies. In this work, the... more Summary Resistivity method is used extensively in environmental impact studies. In this work, the results of the geoelectrical characterization of a hydrocarbons contaminated site are presented. Although the contamination grade of the study area is low, were mapped two contaminated zones into sandy aquifer. In addition, petrophysical parameters were estimated by recalculate of ground and water resistivity values in clay
A geoelectrical characterization of an oil-contaminated site, where thirty years ago an oil well ... more A geoelectrical characterization of an oil-contaminated site, where thirty years ago an oil well was drilled, was carried out using vertical electrical sounding (VES) method on 2D Resistivity Imaging technology and 2D interpretation. VES data were added by water resistivity measurements and soil resistivity analysis. The contaminated zones feature with low resistivity anoma- lies situated above groundwater level. The geoelectrical
Resistivity sounding technology is applied to the characterization of oil polluted areas. It incl... more Resistivity sounding technology is applied to the characterization of oil polluted areas. It includes the analysis of the model of oil pollution as a low resistivity zone, the field study technique, advanced data processing, petrophysical simulation and data interpretation. Oil pollution is widespread and arises at all stages of the petroleum industry: extraction, transportation, refining and distribution. Under the influence
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2005, 2005
Hydrocarbons are among the main factors of geological medium contamination. We differentiate long... more Hydrocarbons are among the main factors of geological medium contamination. We differentiate long-term contaminations lasting years or decades of years and short-term contaminations or single accidents. The first produces give more evident geophysical anomalies, whereas anomaly strength of the second depends on the time since the accident occurred. After 6-12 months following the accident this type of contamination gives measurably low resistivity anomalies.
SEG Technical Program Expanded Abstracts 2004, 2004
Resistivity method is used extensively in environmental impact studies. In this work, the results... more Resistivity method is used extensively in environmental impact studies. In this work, the results of the geoelectrical characterization of a hydrocarbons contaminated site are presented. Although the contamination grade of the study area is low, were mapped two contaminated zones into sandy aquifer. In addition, petrophysical parameters were estimated by recalculate of ground and water resistivity values in clay content, porosity and CEC values. Anomalous values of clay content, porosity and CEC indicate the presence of hydrocarbon contaminants. The correlation between geoelectrical results, petrophysical parameters and hydrocarbons contamination was verified in laboratory by electrical measurements made in pure and contaminated sand samples.
Near Surface Geophysics, 2012
ABSTRACT In this paper, we present an electromagnetic surface technique for the integrity inspect... more ABSTRACT In this paper, we present an electromagnetic surface technique for the integrity inspection of buried pipelines groups. The inspection includes the determination of the pipeline plan location and depth, assessment of insulation-coating quality and cathodic protection conditions. This technique is based on the approximation of a metallic pipeline by a heterogeneous transmission line. In the transmission line model, the degree of coating damage (disbanded or cracked insulation) corresponds to the leakage resistance that is defined by the coating resistance and environmental resistivity. Using the transmission line model, we simulated the voltage and current distributions along a pipeline created by the cathodic protection system or an external generator in a low-frequency range. The calculations were performed for both a single pipeline and interconnected pipelines with different insulation-coating quality (model of a common cathodic protection system). We describe the field operations, which consist of measurements of the magnetic field created by the current flowing into a pipeline, voltages on the cathodic protection control posts and soil resistivity. To find the pipeline position, depth and current we apply the interactive inversion of the magnetic-field data obtained along the profiles orthogonally oriented to the pipeline-group route. The interpretation of the field data includes: calculating the leakage current (the current difference on the measuring interval) for each pipeline, determining the leakage resistance (the voltage to the leakage-current ratio) and assessing the insulation-coating resistance taking into account the surrounding soil resistivity. We present practical examples of the integrity inspection of interconnected pipelines group in Mexico. The successful results achieved allow us to recommend this electromagnetic technique for quantitative inspection of the technical conditions of interconnected pipelines.
Revista internacional …, 2006
We confirm that electrical methods are effective tools in the characterization of oil contaminate... more We confirm that electrical methods are effective tools in the characterization of oil contaminated sites, as they help to delineate the geometry of the contamination plume, and their results are useful for planning the remediation process. In this work, the results from the application of the VES method in the characterization of an oil contaminated site are presented. Electrical measurements in groundwater samples and petrophysical modeling helped to define the geoelectrical boundary between contaminated and clean zones. Highly contaminated zones are associated with the presence of free-phase hydrocarbons. By using contamination plume and limestone thickness maps some recovering drill holes were proposed for the remediation of the site by extraction of free-phase hydrocarbons.
Geofísica …, 2006
El método Sondeo Eléctrico Vertical (SEV) es ampliamente utilizado en estudios de impacto ambient... more El método Sondeo Eléctrico Vertical (SEV) es ampliamente utilizado en estudios de impacto ambiental incluyendo el caso de contaminación por hidrocarburos. En este trabajo se presentan los resultados de la caracterización geoeléctrica de un sitio contaminado por hidrocarburos relacionado con una fuga en línea de ducto. El estudio geoeléctrico fue realizado utilizando el método SEV en la variante de tomografía, realizándose una interpretación 2D de los datos observados. Seis perfiles paralelos de SEV fueron medidos y presentados sus resultados en secciones y mapas. Se determinó un modelo estratificado que incluye acuitardo y acuífero. Aunque el grado de contaminación en este sitio es bajo fue posible localizar dos zonas contaminadas dentro del acuífero. El acuífero y el acuitardo fueron caracterizados con base en su resistividad, contenido de arcilla, porosidad y capacidad de intercambio catiónico. Los valores de resistividad fueron recalculados a valores de parámetros petrofísicos utilizando un algoritmo de inversión que toma en cuenta la salinidad del agua de poro. En zonas no contaminadas los parámetros petrofísicos estimados a partir de datos de resistividad presentan valores cercanos a los reales, mientras que en zonas contaminadas se obtienen valores anómalos. Efectos similares de la influencia contaminación sobre los parámetros petrofísicos fueron encontrados en laboratorio realizando mediciones de resistividad en muestras de arena limpia y contaminada.
Geofísica …, 2006
El contenido de arcilla en suelos areno-arcillosos influye sobre la permeabilidad hidráulica (coe... more El contenido de arcilla en suelos areno-arcillosos influye sobre la permeabilidad hidráulica (coeficiente de filtración). Se presenta una revisión de datos experimentales publicados que relacionan el coeficiente de filtración con el tipo litológico del suelo y el tamaño de las partículas. A partir de cálculos teóricos, se modifican las conocidas fórmulas que relacionan el coeficiente de filtración con el contenido de arcilla. Se estima el contenido de arcilla a partir de los datos interpretados por el método SEV, y se propone un procedimiento para la estimación del coeficiente de filtración: (a) cálculo del contenido de arcilla a partir de la resistividad del suelo y de la salinidad del agua subterránea, (b) estimación del coeficiente de filtración a partir del contenido de arcilla. Se presentan algunos ejemplos de la aplicación de esta metodología.
GEOFISICA …, 2006
El método Sondeo Eléctrico Vertical (SEV), conocido desde 1912, ha cambiado sustancialmente duran... more El método Sondeo Eléctrico Vertical (SEV), conocido desde 1912, ha cambiado sustancialmente durante los últimos 10 años, apareciendo una nueva tecnología llamada Imagen de Resistividad (IR) con interpretación 2D de los datos de resistividad. Otra vía posible de desarrollo del método SEV es, partiendo de las relaciones existentes entre la resistividad eléctrica y los parámetros petrofísicos (PP), estimar estos últimos a partir de datos de IR. Para la realización práctica de este concepto fue desarrollada la teoría del problema directo e inverso que relaciona la resistividad eléctrica con los PP. Cada trabajo de campo deberá incluir un levantamiento de SEV (IR), mediciones de resistividad eléctrica del agua subterránea con el objetivo de determinar su salinidad y la recolección de algunas muestras representativas de suelo del sitio con mediciones hechas en laboratorio de la resistividad eléctrica como función de la salinidad del agua de poro, creando el modelo petrofísico del suelo de este sitio. Esta tecnología puede ser utilizada tanto para la caracterización de sitios limpios como contaminados por hidrocarburos. Para el caso de sitios contaminados, los valores de los PP determinados en laboratorio, salinidad de agua y los datos de IR, permiten establecer la frontera petrofísica entre suelo limpio y contaminado, y por consiguiente, configurar la pluma contaminante. En este trabajo se incluyen, como ejemplos prácticos, los resultados de la aplicación de esta tecnología en algunos sitios contaminados por hidrocarburos en México.
Near Surface 2010 - 16th EAGE European Meeting of Environmental and Engineering Geophysics, 2010
In area of study near the channel Valle del Fuerte in Sinaloa state, Mexico, geological and geoel... more In area of study near the channel Valle del Fuerte in Sinaloa state, Mexico, geological and geoelectrical characteristics of soil were measured in seven key areas. In each of seven key areas an electrical resistivity tomography (ERT) profile was fulfilled, three boreholes were made with soil samples collection in each borehole, filtration coefficients of soil, cation exchange capacity, porosity and grain size distribution, groundwater salinity and ionic content in water were determined. ERT data were interpreted and soil resistivity curves versus pore water salinity were measured. Joint analysis of all data obtained was performed to find correlations between them to create petrophysical model of soil. Verification of this model was performed by correlation between the same petrophysical parameters measured in laboratory and obtained from geophysical data.
2004 International Pipeline Conference, Volumes 1, 2, and 3, 2004
ABSTRACT
Summary Resistivity method is used extensively in environmental impact studies. In this work, the... more Summary Resistivity method is used extensively in environmental impact studies. In this work, the results of the geoelectrical characterization of a hydrocarbons contaminated site are presented. Although the contamination grade of the study area is low, were mapped two contaminated zones into sandy aquifer. In addition, petrophysical parameters were estimated by recalculate of ground and water resistivity values in clay
A geoelectrical characterization of an oil-contaminated site, where thirty years ago an oil well ... more A geoelectrical characterization of an oil-contaminated site, where thirty years ago an oil well was drilled, was carried out using vertical electrical sounding (VES) method on 2D Resistivity Imaging technology and 2D interpretation. VES data were added by water resistivity measurements and soil resistivity analysis. The contaminated zones feature with low resistivity anoma- lies situated above groundwater level. The geoelectrical
Resistivity sounding technology is applied to the characterization of oil polluted areas. It incl... more Resistivity sounding technology is applied to the characterization of oil polluted areas. It includes the analysis of the model of oil pollution as a low resistivity zone, the field study technique, advanced data processing, petrophysical simulation and data interpretation. Oil pollution is widespread and arises at all stages of the petroleum industry: extraction, transportation, refining and distribution. Under the influence
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2005, 2005
Hydrocarbons are among the main factors of geological medium contamination. We differentiate long... more Hydrocarbons are among the main factors of geological medium contamination. We differentiate long-term contaminations lasting years or decades of years and short-term contaminations or single accidents. The first produces give more evident geophysical anomalies, whereas anomaly strength of the second depends on the time since the accident occurred. After 6-12 months following the accident this type of contamination gives measurably low resistivity anomalies.
SEG Technical Program Expanded Abstracts 2004, 2004
Resistivity method is used extensively in environmental impact studies. In this work, the results... more Resistivity method is used extensively in environmental impact studies. In this work, the results of the geoelectrical characterization of a hydrocarbons contaminated site are presented. Although the contamination grade of the study area is low, were mapped two contaminated zones into sandy aquifer. In addition, petrophysical parameters were estimated by recalculate of ground and water resistivity values in clay content, porosity and CEC values. Anomalous values of clay content, porosity and CEC indicate the presence of hydrocarbon contaminants. The correlation between geoelectrical results, petrophysical parameters and hydrocarbons contamination was verified in laboratory by electrical measurements made in pure and contaminated sand samples.
Near Surface Geophysics, 2012
ABSTRACT In this paper, we present an electromagnetic surface technique for the integrity inspect... more ABSTRACT In this paper, we present an electromagnetic surface technique for the integrity inspection of buried pipelines groups. The inspection includes the determination of the pipeline plan location and depth, assessment of insulation-coating quality and cathodic protection conditions. This technique is based on the approximation of a metallic pipeline by a heterogeneous transmission line. In the transmission line model, the degree of coating damage (disbanded or cracked insulation) corresponds to the leakage resistance that is defined by the coating resistance and environmental resistivity. Using the transmission line model, we simulated the voltage and current distributions along a pipeline created by the cathodic protection system or an external generator in a low-frequency range. The calculations were performed for both a single pipeline and interconnected pipelines with different insulation-coating quality (model of a common cathodic protection system). We describe the field operations, which consist of measurements of the magnetic field created by the current flowing into a pipeline, voltages on the cathodic protection control posts and soil resistivity. To find the pipeline position, depth and current we apply the interactive inversion of the magnetic-field data obtained along the profiles orthogonally oriented to the pipeline-group route. The interpretation of the field data includes: calculating the leakage current (the current difference on the measuring interval) for each pipeline, determining the leakage resistance (the voltage to the leakage-current ratio) and assessing the insulation-coating resistance taking into account the surrounding soil resistivity. We present practical examples of the integrity inspection of interconnected pipelines group in Mexico. The successful results achieved allow us to recommend this electromagnetic technique for quantitative inspection of the technical conditions of interconnected pipelines.
Revista internacional …, 2006
We confirm that electrical methods are effective tools in the characterization of oil contaminate... more We confirm that electrical methods are effective tools in the characterization of oil contaminated sites, as they help to delineate the geometry of the contamination plume, and their results are useful for planning the remediation process. In this work, the results from the application of the VES method in the characterization of an oil contaminated site are presented. Electrical measurements in groundwater samples and petrophysical modeling helped to define the geoelectrical boundary between contaminated and clean zones. Highly contaminated zones are associated with the presence of free-phase hydrocarbons. By using contamination plume and limestone thickness maps some recovering drill holes were proposed for the remediation of the site by extraction of free-phase hydrocarbons.
Geofísica …, 2006
El método Sondeo Eléctrico Vertical (SEV) es ampliamente utilizado en estudios de impacto ambient... more El método Sondeo Eléctrico Vertical (SEV) es ampliamente utilizado en estudios de impacto ambiental incluyendo el caso de contaminación por hidrocarburos. En este trabajo se presentan los resultados de la caracterización geoeléctrica de un sitio contaminado por hidrocarburos relacionado con una fuga en línea de ducto. El estudio geoeléctrico fue realizado utilizando el método SEV en la variante de tomografía, realizándose una interpretación 2D de los datos observados. Seis perfiles paralelos de SEV fueron medidos y presentados sus resultados en secciones y mapas. Se determinó un modelo estratificado que incluye acuitardo y acuífero. Aunque el grado de contaminación en este sitio es bajo fue posible localizar dos zonas contaminadas dentro del acuífero. El acuífero y el acuitardo fueron caracterizados con base en su resistividad, contenido de arcilla, porosidad y capacidad de intercambio catiónico. Los valores de resistividad fueron recalculados a valores de parámetros petrofísicos utilizando un algoritmo de inversión que toma en cuenta la salinidad del agua de poro. En zonas no contaminadas los parámetros petrofísicos estimados a partir de datos de resistividad presentan valores cercanos a los reales, mientras que en zonas contaminadas se obtienen valores anómalos. Efectos similares de la influencia contaminación sobre los parámetros petrofísicos fueron encontrados en laboratorio realizando mediciones de resistividad en muestras de arena limpia y contaminada.
Geofísica …, 2006
El contenido de arcilla en suelos areno-arcillosos influye sobre la permeabilidad hidráulica (coe... more El contenido de arcilla en suelos areno-arcillosos influye sobre la permeabilidad hidráulica (coeficiente de filtración). Se presenta una revisión de datos experimentales publicados que relacionan el coeficiente de filtración con el tipo litológico del suelo y el tamaño de las partículas. A partir de cálculos teóricos, se modifican las conocidas fórmulas que relacionan el coeficiente de filtración con el contenido de arcilla. Se estima el contenido de arcilla a partir de los datos interpretados por el método SEV, y se propone un procedimiento para la estimación del coeficiente de filtración: (a) cálculo del contenido de arcilla a partir de la resistividad del suelo y de la salinidad del agua subterránea, (b) estimación del coeficiente de filtración a partir del contenido de arcilla. Se presentan algunos ejemplos de la aplicación de esta metodología.
GEOFISICA …, 2006
El método Sondeo Eléctrico Vertical (SEV), conocido desde 1912, ha cambiado sustancialmente duran... more El método Sondeo Eléctrico Vertical (SEV), conocido desde 1912, ha cambiado sustancialmente durante los últimos 10 años, apareciendo una nueva tecnología llamada Imagen de Resistividad (IR) con interpretación 2D de los datos de resistividad. Otra vía posible de desarrollo del método SEV es, partiendo de las relaciones existentes entre la resistividad eléctrica y los parámetros petrofísicos (PP), estimar estos últimos a partir de datos de IR. Para la realización práctica de este concepto fue desarrollada la teoría del problema directo e inverso que relaciona la resistividad eléctrica con los PP. Cada trabajo de campo deberá incluir un levantamiento de SEV (IR), mediciones de resistividad eléctrica del agua subterránea con el objetivo de determinar su salinidad y la recolección de algunas muestras representativas de suelo del sitio con mediciones hechas en laboratorio de la resistividad eléctrica como función de la salinidad del agua de poro, creando el modelo petrofísico del suelo de este sitio. Esta tecnología puede ser utilizada tanto para la caracterización de sitios limpios como contaminados por hidrocarburos. Para el caso de sitios contaminados, los valores de los PP determinados en laboratorio, salinidad de agua y los datos de IR, permiten establecer la frontera petrofísica entre suelo limpio y contaminado, y por consiguiente, configurar la pluma contaminante. En este trabajo se incluyen, como ejemplos prácticos, los resultados de la aplicación de esta tecnología en algunos sitios contaminados por hidrocarburos en México.