Publicado

2020-07-01

Interference test interpretation in naturally fractured reservoirs

Interpretación de pruebas de interferencia en yacimientos naturalmente fracturados

Palabras clave:

naturally fractured reservoir, interference, interporosity flow parameter, storativity ratio (en)
Yyacimiento naturalmente fracturado, interferencia, parámetro de flujo interporoso, relación de almace (es)

Autores/as

The naturally fractured reservoir characterization is crucial because it can help to predict the flow pattern of fluids, and the storativity ratio of the fractures and to understand whether two or more wells have communication, among others. This paper presents a practical methodology for interpreting interference tests in naturally fractured reservoirs using characteristic points found on the pressure derivative curve. These kinds of tests describe a system that consists of a producing well and an observation well separated by a distance (r). Using characteristic points and features found on the pressure and pressure derivative log-log plot, Analytical expressions were developed from the characteristic points of the pressure and pressure derivative log-log plot to determine the interporosity flow parameter (λ) and the storativity ratio of the fractures (ω). Finally, examples are used to successfully verify the expressions developed so that the naturally-fractured parameters were reproduced with good accuracy.

La caracterización de un yacimiento naturalmente fracturado es muy importante debido a que puede ayudar a predecir patrón de flujo de los fluidos, la capacidad de almacenamiento de las fracturas y saber si dos o más pozos de un mismo yacimiento se encuentran comunicados, entre otros. Este estudio presenta una metodología práctica para interpretar pruebas de interferencia en yacimientos naturalmente fracturados usando puntos característicos en la curva de la derivada de presión. Este tipo de prueba describe un sistema compuesto por un pozo productor y un pozo de observación ubicados a una distancia (r). Utilizando puntos y características únicas del gráfico log-log de presión y derivada de presión, y Se desarrollaron expresiones analíticas a partir de los puntos característicos del gráfico log-log de presión y derivada de la presión con el fin de poder determinar el parámetro de flujo interporoso (λ) y la capacidad de almacenamiento de las fracturas (ω). Finalmente, se presentan ejemplos para verificar satisfactoriamente las expresiones desarrolladas de modo que los parámetros de los yacimientos naturalmente fracturados fueron reproducidos con buena exactitud.

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Citas

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