Micropore size analysis in oil-well cement by proton nuclear relaxation

✍ Scribed by Gwenn Le Saoût; Eric Lécolier; Alain Rivereau; Hélène Zanni

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 93 KB
• Volume: 23
• Category: Article
• ISSN: 0730-725X
• DOI: 10.1016/j.mri.2004.11.052

✦ Synopsis

The durability of cement depends mainly on cement microstructure parameters such as pore size distribution. In this study, we have observed pore size distribution in a Class G oil-well cement immersed for 1 year in brine at T = 293 K, P =10 5 Pa and in a down-hole condition at T = 353 K, P = 7.10 6 Pa by proton nuclear magnetic spin-lattice relaxation ( 1 H-NMR). After 4 months of immersion at T = 293 K, P = 10 5 Pa, the distribution of discrete relaxation rates reveals the fractal feature of the pore size distribution, whereas after 1 year at T = 353 K, P = 7.10 6 Pa, a dispersed distribution is still observed.