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Sismicidad inducida. La inyección de alta velocidad está asociada con el aumento de la sismicidad del medio
M Weingarten1, S Ge2, J W Godt3
1Department of Geological Sciences, University of Colorado, Boulder, CO, USA. matthew.weingarten@colorado.edu.
Science (New York, N.Y.)
|June 20, 2015
Resumen
Los pozos de inyección de aguas residuales están relacionados con el aumento de las tasas de terremotos en el centro del continente estadounidense. Los pozos de inyección de alta velocidad muestran una asociación más fuerte con la actividad sísmica, lo que sugiere que la gestión de la velocidad de inyección puede reducir los terremotos inducidos.
Área de la Ciencia:
- La geofísica es la geofísica.
- Sismología Sismología Sismología.
- Ciencias ambientales Ciencias ambientales.
Sus antecedentes:
- Un aumento sin precedentes en los terremotos en el centro del continente estadounidense comenzó en 2009.
- Muchos de estos eventos sísmicos están relacionados con las actividades de inyección de aguas residuales.
Objetivo del estudio:
- Investigar la relación entre la inyección de aguas residuales y la sismicidad en el centro y el este de los Estados Unidos.
- Para identificar los factores correlacionados con la sismicidad inducida.
Principales métodos:
- Reunió una nueva base de datos de pozos de inyección en todo el centro y el este de los Estados Unidos.
- Analizó la correlación entre las tasas de terremotos y los datos de inyección de aguas residuales.
Principales resultados:
- Todo el aumento observado en la tasa de terremotos está asociado con los pozos de inyección de fluidos.
- Los pozos de inyección de alta velocidad (>300,000 barriles / mes) están más frecuentemente relacionados con los terremotos que los pozos de menor velocidad.
- El volumen inyectado acumulado, la presión, la profundidad y la proximidad a la roca del sótano no se correlacionaron fuertemente con la asociación de terremotos.
Conclusiones:
- La inyección de aguas residuales es un factor significativo en la sismicidad del medio continente estadounidense.
- La gestión de las tasas de inyección parece ser una estrategia viable para mitigar el riesgo de terremotos inducidos.
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