Caracterización petrofísica de la formación oficina en un sector del bloque carabobo mediante métodos fractales
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Universidad Industrial de Santander
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El propósito es generar modelos de isopropiedades petrofísicas a partir de métodos estadísticos que contribuyan en la caracterización estática de yacimientos, el concepto de fractal el cual se define como un objeto cuya estructura se repite a diferentes escalas, fue el método aplicado. Considerando que el campo Carabobo presenta bajo ángulo, se decidió la utilización de fractales en esta investigación introduciendo como registros de entrada los de rayos gamma, densidad, resistividad y el de porosidad efectiva, a los cuales se le aplicó método para la elaboración y el análisis de modelos de isopropiedades petrofísicas, ya que cumplen con la condición de que los registros se comportan como series en tiempo, con aleatoriedad y pueden ser normalizados. A partir del análisis por la técnica de rango escalado “R/S” (re-escalamiento) se obtiene el exponente o coeficiente Hurst (H) que indica el grado de rigurosidad y persistencia de los datos con la distancia, estableciendo de esta manera el alcance de los mismos al realizar la interpolación fractal de los pozos, generando así pseudopozos. De la integración de los pozos originales y los pseudopozos generados se estimó la distribución espacial de las propiedades petrofísicas. Corroborando que es una herramienta útil, reduce la incertidumbre en la determinación y extensión de prospectos en procesos exploratorios y mejora la visualización de las propiedades petrofísicas tanto horizontal como verticalmente.
The purpose is to generate models of petrophysical isoproperties from statistical methods that contribute to the static characterization of deposits, the concept of fractal which is defined as an object whose structure is repeated at different scales, was the applied method. Considering that the Carabobo field presents low angle, it was decided to use fractals in this investigation introducing as input records those of gamma rays, density, resistivity and effective porosity, to which the method was applied. for the elaboration and analysis of petrophysical isoproperties models, since they comply with the condition that the records behave as series in time, with randomness and can be normalized. From the analysis by the scaled range technique “R/S” (re- escalation), the Hurst exponent or coefficient (H) is obtained, which indicates the degree of rigor and persistence of the data with distance, establishing in this way the scope of the same when performing the fractal interpolation of the wells, thus generating pseudopozos. The spatial distribution of the petrophysical properties was estimated from the integration of the original wells and the generated pseudo-wells. Corroborating that it is a useful tool, it reduces the uncertainty in the determination and extension of prospects in exploratory processes and improves the visualization of the petrophysical properties both horizontally and vertically.
The purpose is to generate models of petrophysical isoproperties from statistical methods that contribute to the static characterization of deposits, the concept of fractal which is defined as an object whose structure is repeated at different scales, was the applied method. Considering that the Carabobo field presents low angle, it was decided to use fractals in this investigation introducing as input records those of gamma rays, density, resistivity and effective porosity, to which the method was applied. for the elaboration and analysis of petrophysical isoproperties models, since they comply with the condition that the records behave as series in time, with randomness and can be normalized. From the analysis by the scaled range technique “R/S” (re- escalation), the Hurst exponent or coefficient (H) is obtained, which indicates the degree of rigor and persistence of the data with distance, establishing in this way the scope of the same when performing the fractal interpolation of the wells, thus generating pseudopozos. The spatial distribution of the petrophysical properties was estimated from the integration of the original wells and the generated pseudo-wells. Corroborating that it is a useful tool, it reduces the uncertainty in the determination and extension of prospects in exploratory processes and improves the visualization of the petrophysical properties both horizontally and vertically.
Keywords
Fractal algorithm, models of petrophysical isoproperties wells register, algoritmos fractales, modelado de isopropiedades petrofísica, registros de pozos