Ataque del anhídrido carbónico y el ácido sulfhídrico sobre pastas de cemento API clase H expuestas a aguas de formación salina

  1. Márquez Martínez, Gonzalo
  2. Alejandre Sánchez, Francisco Javier
  3. Martín del Río, Juan Jesús
  4. Arribas de Paz, Ricardo
  5. Blasco-López, Francisco-Javier
Journal:
Materiales de construcción

ISSN: 0465-2746

Year of publication: 2011

Volume: 61

Issue: 303

Pages: 371-384

Type: Article

More publications in: Materiales de construcción

Abstract

Se simuló la acción agresiva de los denominados iones fundamentales (sulfato, cloruro y magnesio) y los gases agrios presentes en el gas natural (CO2 y H2S) sobre un cemento API clase H utilizado en pozos gasíferos a presión y temperatura elevadas, al objeto de observar sus alteraciones fisicoquímicas por la acción combinada de tales gases y las aguas de formación. Se prepararon varias probetas del material cementante para su inmersión en disoluciones neutras, conteniendo los iones fundamentales en concentraciones fijas, dentro de reactores tipo Parr. Se analizaron durante más de dos meses una serie de disoluciones en contacto con el cemento utilizado; así como, mediante DRX, la evolución de la mineralogía de dicho material entre los 14 y los 60 días. Los principales efectos de ambos gases, en conjunto o por separado, sobre la durabilidad del cemento fueron, respectivamente, la formación de carbonato cálcico y la lixiviación de algunos componentes

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