A phenomenological model for scaling at reservoir level the impact over oil production due to formation damage by fines migration
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Universidad Industrial de Santander
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El objeto del artículo consiste en proponer y resolver un modelo de bases fenomenológicas que permite caracterizar, cuantificar y pronosticar el daño de formación por migración de finos e hinchamiento de arcillas a escala de yacimiento a partir del esquema metodológico matemático lineal de Civan [1]. El proceso de entendimiento del fenómeno de partículas en un medio poroso ha sido abordado en la mayoría de los casos desde la perspectiva del laboratorio, medición de tasas críticas en núcleos de formación y con base en estas se han generado modelos matemáticos para simular los fenómenos de partícula bajo condiciones de laboratorio. Se construye, se propone, se aplica y se valida una metodología para trascender y escalar hasta la escala de yacimiento los resultados de pruebas de daño de formación por flujo de finos observados en laboratorio. La metodología generada se basa en desarrollar pruebas de desplazamiento multi tasa de una suspensión de material fino, resolver y aracterizar el daño por flujo de partículas en el núcleo en función de la velocidad con el modelo lineal de Civan, construir y resolver el modelo para estimar los perfiles de daño en función del radio, validar el esquema con datos de campo para estimar el impacto del daño y el radio crítico para un pozo productor. Actualmente más del 50% de los campos operados por Ecopetrol presentan daño de formación por procesos de partícula, la cantidad de petróleo que se deja de producir por este fenómeno se estima en miles de barriles, con una aproximación de este tipo se puede diseñar y optimizar los tratamientos requeridos para mitigar el daño y recuperar un porcentaje significativo de los barriles que no se pueden producir. En este proyecto se muestra el proceso usando datos de la formación Barco del campo Cupiagua, el escalamiento indica caídas de permeabilidad del 65% por este tipo de daño, radios de daño entre 1.9 y 4.4 ft y valor “skin” de daño por finos entre 1.9 y 3.4. Este proceso permitió generar diseños de los tratamientos de estimulación para este campo.
The objective of the article consists in proposing and solving a model of the phenomenological bases that allows characterize, quantify and predict the formation damage due fines migration and swelling clays at reservoir level from the linear mathematical methodological scheme Civan [1]. The process of understanding the phenomenon of particles on a porous medium has been for the most cases approach from the laboratory perspective, measuring the critical rates of the formation plugs and based on this it’s had been generated a mathematical model for the simulation of the particle phenomenon by laboratory conditions. It’s construct, it’s propose, it’s applied and it’s validate a methodology for transcending and scale to the reservoir scale the results of the formation damage by the flow of fines observed in the laboratory. The generated methodology is base in performing multi-rate coreflooding tests, solve and characterize the damage by particles flow in the plug in function of velocity in the linear model of Civan, construct and determine the model for estimate the profiles of damages in function of the radius, validate the scheme with field data for estimate the impact of damage and the critical radius of the producing well. At the present time more than 50% of the oil fields operate by Ecopetrol display formation damage by particle process, the quantity of the petroleum that it stop producing by this phenomenon is estimated in the thousands of barrels, with this kind of approximation it’s can be design and optimize the treatment require for mitigate the damage and recover a significate percentage of the barrels left out of production. In this project it’s show the entire process using data from the formation Barco of Cupiagua field, the scaling results indicate drops of permeability of 65% by this type of amage, damage radius between 1.9 and 4.4 ft and skin value by fines between 1.9 and 3.4. This process allows to generate the designs of the stimulating treatment for this field.
The objective of the article consists in proposing and solving a model of the phenomenological bases that allows characterize, quantify and predict the formation damage due fines migration and swelling clays at reservoir level from the linear mathematical methodological scheme Civan [1]. The process of understanding the phenomenon of particles on a porous medium has been for the most cases approach from the laboratory perspective, measuring the critical rates of the formation plugs and based on this it’s had been generated a mathematical model for the simulation of the particle phenomenon by laboratory conditions. It’s construct, it’s propose, it’s applied and it’s validate a methodology for transcending and scale to the reservoir scale the results of the formation damage by the flow of fines observed in the laboratory. The generated methodology is base in performing multi-rate coreflooding tests, solve and characterize the damage by particles flow in the plug in function of velocity in the linear model of Civan, construct and determine the model for estimate the profiles of damages in function of the radius, validate the scheme with field data for estimate the impact of damage and the critical radius of the producing well. At the present time more than 50% of the oil fields operate by Ecopetrol display formation damage by particle process, the quantity of the petroleum that it stop producing by this phenomenon is estimated in the thousands of barrels, with this kind of approximation it’s can be design and optimize the treatment require for mitigate the damage and recover a significate percentage of the barrels left out of production. In this project it’s show the entire process using data from the formation Barco of Cupiagua field, the scaling results indicate drops of permeability of 65% by this type of amage, damage radius between 1.9 and 4.4 ft and skin value by fines between 1.9 and 3.4. This process allows to generate the designs of the stimulating treatment for this field.
Keywords
Formation Damage, Fines Migration, Phenomenological Model, Clay Swelling, Critical Rate, Cupiagua, Daño de Formación, Migración de Finos, Hinchamiento de arcillas, Modelo Fenomenológico, Tasa Critica, Cupiagua