Difference between revisions of "CV - Publications"

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'''Estimation and modelling of reservoirs properties through seismic attributes and geostatistics in gas fields, southern Spain. SOVG, XIV Venezuelan Geophysics Congress'''
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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.
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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.
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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.
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The geostatistical methods are much more complex than linear regression but they are more reliable.
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The attributes we used were: the instantaneous amplitude, amplitude RMS, instantaneous frequency and phase.
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'''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.'''
 
'''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.'''
  
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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.
 
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.
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'''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.
 
 
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'''Analysis of pull up effects through computational seismic data modeling and depth migration, Colombian plains'''
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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.
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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.
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The data was provided by the Pacific Rubiales company.
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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

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  • 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

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