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''Adelo Vieira and Crelia Padrón.''
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Analysis of ''pull up'' effects through computational seismic data modeling and depth migration, Colombian plains. [[Media:Articulo_efectos_pull_up-1.pdf|&#8595;Download]]
<p style="font-size: 18px; font-family: Georgia,f Serif;">
 
''2020''
 
</span>
 
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'''[https://www.cct.ie/ College of Computing Technology (CCT)], Ireland'''
 
 
</p>
 
</p>
'''[https://www.cct.ie/course/predictive-data-analytics-diploma/?gclid=Cj0KCQjw0Mb3BRCaARIsAPSNGpWpO0Vy477TXtSUHnmkK4czdkGLNNKFhXC6GRJu-odOOS9XXKJZCYEaAqQ1EALw_wcB <span style="color:black; font-weight:bold">Diploma in Predictive Data Analytics</span>]'''
 
</div>
 
 
* Project: Evaluating the Performance of Lexicon-based and Machine Learning Sentiment Analysis for Amazon reviews classification.
 
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''2020''
 
</span>
 
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<div style="font-size: 16px;">
 
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'''[https://www.cct.ie/ College of Computing Technology (CCT)], Ireland'''
 
</p>
 
'''Bachelor of Science (BSc) (Honours) in Information Technology'''
 
</div>
 
 
* Final year project: Developing a Web Dashboard for analyzing Amazon's Laptop sales data.
 
: To know more about this project, visit [[Developing a Web Dashboard for analyzing Amazon's Laptop sales data]]
 
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''2019''
 
</span>
 
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'''[https://www.cct.ie/ College of Computing Technology (CCT)], Ireland'''
 
</p>
 
'''Bachelor of Science (BSc) in Information Technology'''
 
</div>
 
 
* Final year project: Supervised Machine Learning Models for Fake News Detection.
 
: To know more about this project, visit [[Supervised_Machine_Learning_for_Fake_News_Detection]]
 
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|-
 
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<div style="text-align: center; font-weight: bold;">
 
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<p style="font-size: 18px; font-family: Georgia, Serif;">
 
''2014''
 
</span>
 
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</div>
 
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'''[https://www.topuniversities.com/universities/universite-claude-bernard-lyon-1#wurs Claude Bernard Lyon 1 University], France'''
 
</p>
 
'''Master – Complementary computer studies'''
 
</div>
 
 
* Specialty: Distributed information systems and networks.
 
* Final year study project: Design and Administration of a Wiki Web Application.
 
 
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| colspan="2" |
 
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+
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I have always had a strong interest in Computer Sciences. In fact, when I start my studies in the university, I had to choose between Computer Sciences and Geophysics.
+
'''Estimation and modelling of reservoirs properties through seismic attributes and geostatistics in gas fields, southern Spain. SOVG, XIV Venezuelan Geophysics Congress'''
  
During my studies in geophysics, I took courses in Fortran and C programming, and in Linux System Administration... and I had to program many times in Matlab (for example)... and thus I acquired computer skills.
+
I was co-author of a paper published in the XIV Venezuelan Geophysics Congress, in 2008. In this paper is performed a study of Seismic reservoir characterization (it's when you use seismic data for the estimation of rock properties). We used geostatistics to integrate seismic data and well logs.
  
The master's programme included courses of:
+
Also, because in this area we found clear amplitude anomalies, we analyze the origin of the anomalies in one of the reservoirs in this area.  
* Algorithms and Programming. I took courses in C programming, java and SQL
 
* We also received a training in database management
 
* Linux systems administration
 
* Networks administration.
 
  
Those are the areas I really appreciated, and in these areas is that I have my best computer skills, but there were other courses of course, like:
+
There are many methods trying to find a relationship between seismic attributes and well logs. The most basic method would be to plot a seismic attribute against a rock property and make a linear regression to find a relationship between the seismic attribute and the rock property.  
* VRML: Virtual Reality Modeling Language is a standard file format for representing 3-dimensional (3D) interactive vector graphics,
 
* XML: Extensible Markup Language is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
 
* PHP programming
 
  
Yes, they were basic courses because it was a one year master... and it was a master oriented to not computer professionals. But even if we were not computer professionals we had all computer skill. Because it was a requirement to enroll in that master. So the the courses had a good level I think so.
+
The geostatistical methods are much more complex than linear regression but they are more reliable.
 +
 
 +
The attributes we used were: the instantaneous amplitude, amplitude RMS, instantaneous frequency and phase.
 
</div>
 
</div>
 
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<!--========<blockquote>==========================================================================-->
 
<!--========<blockquote>==========================================================================-->
No existe traducción en francés
+
'''Estimación y modelado de propiedades de yacimiento a través atributos sísmicos y geoestadística en campos de gas del sur de España. SOVG, XIV Congreso venezolano de Geofísica.'''
<!--========</blockquote>=========================================================================-->
 
| style="width: 34.5%; background-color: #f2f2f7; padding: 10px 100px 10px 50px" |
 
<!--========<blockquote>==========================================================================-->
 
Algoritmo y programación (C, Java, VRML)
 
  
Base de Datos: SQL
+
También, debido a que en esta zona la data sísmica muestra claras anomalías de amplitud, se analiza el origen de la anomalía de amplitud generada por uno de los yacimientos tipo en el área de estudio.
  
Administración de sistemas operativos: Linux
+
Métodos como la regresión lineal proveen información acerca de la relación de los atributos y los datos de pozo.
  
Redes
+
Los métodos geoestadísticos son mucho más complejos que los métodos de regresión lineal, pero producen resultados más confiable.
  
VRML
+
Atributos utilizados: amplitud RMS, amplitud instantánea; atributos de frecuencia, frecuencia instantánea y fase; así como superficies de impedancia acústica.
  
XML
+
Con datos provenientes de estos 5 pozos se realizaron entonces los gráficos cruzados correspondientes para tratar de obtener alguna relación lineal, y los mejores resultados obtenidos se muestran en la Tabla 1
<!--========</blockquote>=========================================================================-->
 
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''2011''
 
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<p style="margin-bottom: -10px">
 
'''[https://www.topuniversities.com/universities/universidad-simon-bolivar-usb#371830 Simón Bolívar University], Venezuela'''
 
</p>
 
'''MSc in Earth sciences'''
 
</div>
 
  
* Specialty: Applied Petroleum Geoscience.
+
Posteriormente, se realizó un análisis de una de las anomalías de amplitud observadas. Con dicho propósito generamos un gráfico de la magnitud de la reflexión Rpp vs. θ (ángulo de incidencia) para un yacimiento gasífero que genera fuertes anomalías de amplitud negativa
* Master thesis project (Excellence Honor Mention):  Study of ''Pull up/Push down'' effects through seismic modelling, colombian plains.
 
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{| style="color: black; background: transparent; width: 350%;"
 
| colspan="2" |
 
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I got a master's degree in Petroleum geosciences. I dit this master because I wanted to focuses in oil exploration...
 
  
During this master, I took modules related to the oil exploration process.
+
Esto se hizo a través de las ecuaciones de Zoeppritz tomando los datos de ρ y Vp de los registros de pozo, y utilizando el modelo de Castagna et al. (1985) para estimar Vs
  
I deepen my knowledge in areas such as:
+
Por otra parte, causa suspicacia el hecho de que el yacimiento considerado presenta un espesor bastante pequeño (7 m). Esto nos obliga a pensar en la posibilidad de que las amplitudes anómalas observadas respondan a un efecto de entonación.
* Seismic processing and modeling
 
* Petrophysics
 
* Seismic réservoir characterization
 
  
And I received a training in:
 
* Petroleum System Analysis
 
* Petroleum geology
 
  
These studies gave me the knowledge to understand how the oil industry works
 
  
These studies gave me an overview of how the oil industry works.
+
'''Estudio del efecto de entonación'''
<!--==============================================================================================-->
 
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<!--========<blockquote>==========================================================================-->
 
No existe traducción en francés
 
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<!--========<blockquote>==========================================================================-->
 
Métodos avanzados de interpretación sísmica:
 
 
 
Petrofísica:
 
 
 
Tectónica de Placas:
 
 
 
Descripción sísmica de yacimientos:
 
 
 
Análisis de sistemas petroleros:
 
 
 
Geointegración petrolera:
 
<!--========</blockquote>=========================================================================-->
 
|}
 
  
 +
Para modelar este efecto se diseñó una cuña que simula el comportamiento de una capa que se afina progresivamente. Los valores de densidad y velocidad asignados a este modelo fueron los correspondientes al yacimiento de interés
  
<br />
+
La ondícula empleada para simular la respuesta sísmica de esta cuña fue una Ricker fase cero con una frecuencia dominante de 60 Hz.; valor obtenido a partir del espectro de amplitudes de un grupo de trazas que muestran la anomalía producida por el reservorio considerado. A través de estos parámetros se obtuvo la respuesta sísmica que se muestra en la Figura 7 (a).  
<blockquote>
 
'''My master thesis at CGGVeritas'''
 
{| style="color: black; background: transparent; width: 375%;"
 
| colspan="2" |
 
<!--==============================================================================================-->
 
<div style="max-width: 90%">
 
Creo que hoy en día la geofísica de exploración y producción debe enfocarse en pequeños detalles. Esto porque la exploración de hidrocarburos ya no requiere de un campo gigante para ser economicamente rentable, actualmente pequeñas acumulaciones pueden dar lugar a importantes beneficios para las compañías, pero para ello es indispensable ser detallista en los diversos pasos de exploración y producción. Por ejemplo, el campo de estudio de mi trabajo de maestría estaba compuesto por pequeñas acumulaciones; y en mi trabajo se trata un problema relacionado a la deformación de los reflectores a causa de variaciones laterales de velocidad, el trabajo concluye que estos problemas, podrían ser vitales para una apropiada cuantificación de las reservas.
 
  
Les vitesses de propagation des ondes sismiques
+
El modelo mostrado en la Figura 7 (a) exhibe el efecto de máxima entonación a un espesor de aproximadamente 7 m; esto implica que nuestro yacimiento no es lo suficientemente espeso como para poder diferenciar la reflexión del tope y la base del mismo, produciéndose una superposición de ambas reflexiones. Este modelo comprueba la hipótesis de un incremento de las amplitudes sin relación alguna con la presencia del gas.
</div>
 
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No existe traducción en Inglés
 
 
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<!--========<blockquote>==========================================================================-->
 
<!--========<blockquote>==========================================================================-->
Les vitesses de propagation des ondes sismiques.
+
Il n'y a pas de traduction au français
 
<!--========</blockquote>=========================================================================-->
 
<!--========</blockquote>=========================================================================-->
 
|}
 
|}
</blockquote>
 
 
</div>
 
</div>
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+
''Alejandro Gutiérrez, Evert Durán, Adelo Vieira and Crelia Padrón.''
<div style="text-align: center; font-weight: bold;">
+
</li>
<!--begin--------------------------------------------------------------------------->
+
<p style="margin-bottom: 25px;">
<p style="font-size: 18px; font-family: Georgia, Serif;">
+
Estimation and modelling of reservoirs properties through seismic attributes and geo-statistics in gas fields, southern Spain. SOVG, XIV Venezuelan Geophysics Congress, <i style="font-size: 18px; font-family: Georgia, Serif;">2008</i>. [[Media:Articulo_SOVG-AVO_Entonacion.pdf|&#8595;Download]]
''2007''
 
</span>
 
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<div style="font-size: 16px;">
 
<p style="margin-bottom: -10px">
 
'''[https://www.topuniversities.com/universities/universidad-simon-bolivar-usb#371830 Simón Bolívar University], Venezuela'''
 
 
</p>
 
</p>
'''Geophysical Engineer'''
 
</div>
 
 
* Bachelor thesis project: Basic modelling of pre-stacked seismic data and its corresponding processing sequence, using ''Seismic Unix'' package.
 
 
<div class="oculto mw-collapsible mw-collapsed" data-expandtext="Expand hidden content" data-collapsetext="Collapse hidden content">
 
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{| style="color: black; background: transparent; width: 350%;"
 
{| style="color: black; background: transparent; width: 350%;"
 
| colspan="2" |
 
| colspan="2" |
 
<!--==============================================================================================-->
 
<!--==============================================================================================-->
Geophysics is a discipline that uses different areas of knowledge, such as physics, mathematics, and geology to study the internal constitution and history of the Earth.
+
<div style="max-width: 90%">
 +
'''Analysis of pull up effects through computational seismic data modeling and depth migration, Colombian plains'''
  
The Geophysical engineering career at Simón Bolívar University is based on:
+
In geophysics is called \pu{} to an uplift recognized in the seismic data that is not caused by the shape of geological structures, but by a local high-velocity region or lateral velocity variations. Because there is a considerable lateral variation and a velocity inversion in the Colombian plain basin, this effect has been hypothetically associated with convex upward folded events observed in the seismic data acquired in the area.
  
* A training in seismic exploration methods (acquisition, processing, inversion, and interpretation) and its direct application to the oil industry.
+
In this work, we perform seismic simulations from a flat layers geological model which bring together two representative features of the basin of Colombian eastern plains: normal faulting and velocity inversion; features that produce a singular lateral velocity variation. With this model, the paper discusses three simulation methods: normal ray tracing, prestack ray tracing, and finite differences. This allows visualizing the propagation of the rays through the geological model, generate post a prestack synthetic seismic data, and its corresponding processing sequence. The results show and explain the presence of \pu{} in areas near the fault on synthetic events corresponding to the footwall block. These elevations produced by \pu{} effects coincide relatively with the location of the uplifts observed in the real data; results suggest the existence of such anomaly in the seismic data acquired in the Colombian eastern plains.
* The program also includes a basic training in gravimetric, magnetic and electrical exploration methods
 
* Some courses in geology.
 
 
 
But the career is oriented towards oil exploration because Venezuela is an oil-producing country.
 
  
 +
The data was provided by the Pacific Rubiales company.
 +
</div>
 
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| style="width: 34.5%; background-color: white; padding: 10px 100px 10px 50px" |
 
<!--========<blockquote>==========================================================================-->
 
<!--========<blockquote>==========================================================================-->
La Ingeniería Geofísica aplica distintas áreas del conocimiento tales como la Física, las Matemáticas y la Geología, al estudio de la constitución interna e historia de la Tierra.
+
Il n'y a pas de traduction au français
 
 
La formación del Ingeniero Geofísico en la Universidad Simón Bolívar se cimenta en:
 
 
 
* Una preparación en métodos de exploración sísmica (adquisición, procesamiento, inversión e interpretación) y sus aplicaciones directas a la industria petrolera.
 
* Una preparación básica en métodos de exploración gravimétrica, magnética, y eléctrica
 
* Una cadena de cursos en Geología que sirven al futuro ingeniero en sus labores de interprete y geointegrador.
 
 
 
 
 
'''Ejemplos de aplicaciones de la Ingeniería Geofísica:'''
 
 
 
* En la exploración petrolera, los métodos de prospección sísmica permiten detectar las trampas que sirven de receptáculos a los hidrocarburos a profundidades que por otras vías sería imposible determinar.
 
 
 
* En la exploración minera los métodos gravimétricos y magnéticos permiten la evaluación del suelo y del subsuelo con el fin de ubicar y/o descubrir, ampliar y redefinir yacimientos minerales que no son visibles en superficie, además de que por estas mismas vías es posible establecer zonas de recursos minerales económicamente explotables.
 
 
 
* En la Ingeniería Civil la Geofísica permite estudiar las condiciones del subsuelo para el emplazamiento de obras de envergadura (presas, viaductos, edificios, carreteras etc.) y en la Agronomía permite definir posibles acuíferos utilizables ya sea para riego o para consumo humano.
 
 
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| style="width: 34.5%; background-color: #f2f2f7; padding: 10px 100px 10px 50px" |
 
<!--========<blockquote>==========================================================================-->
 
<!--========<blockquote>==========================================================================-->
No existe traducción en francés
+
No existe traducción en español
 
<!--========</blockquote>=========================================================================-->
 
<!--========</blockquote>=========================================================================-->
 
|}
 
|}
 
</div>
 
</div>
<!--end----------------------------------------------------------------------------->
+
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|-
+
<section end=cv-publications />
<!--end--=========================================================================-->
 
<!--end--#########################################################################-->
 
|}
 
<section end=cv-education />
 

Latest revision as of 21:19, 15 March 2021






  • Adelo Vieira and Crelia Padrón.
  • Analysis of pull up effects through computational seismic data modeling and depth migration, Colombian plains. ↓Download

    Estimation and modelling of reservoirs properties through seismic attributes and geostatistics in gas fields, southern Spain. SOVG, XIV Venezuelan Geophysics Congress

    I was co-author of a paper published in the XIV Venezuelan Geophysics Congress, in 2008. In this paper is performed a study of Seismic reservoir characterization (it's when you use seismic data for the estimation of rock properties). We used geostatistics to integrate seismic data and well logs.

    Also, because in this area we found clear amplitude anomalies, we analyze the origin of the anomalies in one of the reservoirs in this area.

    There are many methods trying to find a relationship between seismic attributes and well logs. The most basic method would be to plot a seismic attribute against a rock property and make a linear regression to find a relationship between the seismic attribute and the rock property.

    The geostatistical methods are much more complex than linear regression but they are more reliable.

    The attributes we used were: the instantaneous amplitude, amplitude RMS, instantaneous frequency and phase.

    Estimación y modelado de propiedades de yacimiento a través atributos sísmicos y geoestadística en campos de gas del sur de España. SOVG, XIV Congreso venezolano de Geofísica.

    También, debido a que en esta zona la data sísmica muestra claras anomalías de amplitud, se analiza el origen de la anomalía de amplitud generada por uno de los yacimientos tipo en el área de estudio.

    Métodos como la regresión lineal proveen información acerca de la relación de los atributos y los datos de pozo.

    Los métodos geoestadísticos son mucho más complejos que los métodos de regresión lineal, pero producen resultados más confiable.

    Atributos utilizados: amplitud RMS, amplitud instantánea; atributos de frecuencia, frecuencia instantánea y fase; así como superficies de impedancia acústica.

    Con datos provenientes de estos 5 pozos se realizaron entonces los gráficos cruzados correspondientes para tratar de obtener alguna relación lineal, y los mejores resultados obtenidos se muestran en la Tabla 1

    Posteriormente, se realizó un análisis de una de las anomalías de amplitud observadas. Con dicho propósito generamos un gráfico de la magnitud de la reflexión Rpp vs. θ (ángulo de incidencia) para un yacimiento gasífero que genera fuertes anomalías de amplitud negativa

    Esto se hizo a través de las ecuaciones de Zoeppritz tomando los datos de ρ y Vp de los registros de pozo, y utilizando el modelo de Castagna et al. (1985) para estimar Vs

    Por otra parte, causa suspicacia el hecho de que el yacimiento considerado presenta un espesor bastante pequeño (7 m). Esto nos obliga a pensar en la posibilidad de que las amplitudes anómalas observadas respondan a un efecto de entonación.


    Estudio del efecto de entonación

    Para modelar este efecto se diseñó una cuña que simula el comportamiento de una capa que se afina progresivamente. Los valores de densidad y velocidad asignados a este modelo fueron los correspondientes al yacimiento de interés

    La ondícula empleada para simular la respuesta sísmica de esta cuña fue una Ricker fase cero con una frecuencia dominante de 60 Hz.; valor obtenido a partir del espectro de amplitudes de un grupo de trazas que muestran la anomalía producida por el reservorio considerado. A través de estos parámetros se obtuvo la respuesta sísmica que se muestra en la Figura 7 (a).

    El modelo mostrado en la Figura 7 (a) exhibe el efecto de máxima entonación a un espesor de aproximadamente 7 m; esto implica que nuestro yacimiento no es lo suficientemente espeso como para poder diferenciar la reflexión del tope y la base del mismo, produciéndose una superposición de ambas reflexiones. Este modelo comprueba la hipótesis de un incremento de las amplitudes sin relación alguna con la presencia del gas.

    Il n'y a pas de traduction au français

  • Alejandro Gutiérrez, Evert Durán, Adelo Vieira and Crelia Padrón.
  • Estimation and modelling of reservoirs properties through seismic attributes and geo-statistics in gas fields, southern Spain. SOVG, XIV Venezuelan Geophysics Congress, 2008. ↓Download

    Analysis of pull up effects through computational seismic data modeling and depth migration, Colombian plains

    In geophysics is called \pu{} to an uplift recognized in the seismic data that is not caused by the shape of geological structures, but by a local high-velocity region or lateral velocity variations. Because there is a considerable lateral variation and a velocity inversion in the Colombian plain basin, this effect has been hypothetically associated with convex upward folded events observed in the seismic data acquired in the area.

    In this work, we perform seismic simulations from a flat layers geological model which bring together two representative features of the basin of Colombian eastern plains: normal faulting and velocity inversion; features that produce a singular lateral velocity variation. With this model, the paper discusses three simulation methods: normal ray tracing, prestack ray tracing, and finite differences. This allows visualizing the propagation of the rays through the geological model, generate post a prestack synthetic seismic data, and its corresponding processing sequence. The results show and explain the presence of \pu{} in areas near the fault on synthetic events corresponding to the footwall block. These elevations produced by \pu{} effects coincide relatively with the location of the uplifts observed in the real data; results suggest the existence of such anomaly in the seismic data acquired in the Colombian eastern plains.

    The data was provided by the Pacific Rubiales company.

    Il n'y a pas de traduction au français

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