title: Micropore size analysis in oil-well cement by proton nuclear relaxation.
abstract: 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 (1H-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.
authors.affiliation: Institut Français du Pétrole, 1-4 av de Bois Préau, 92852 Rueil-Malmaison, France. lesaout_gwenn@yahoo.fr
authors.forename: Gwenn
authors.initials: G
authors.lastname: Le Saoût
authors.forename: Eric
authors.initials: E
authors.lastname: Lécolier
authors.forename: Alain
authors.initials: A
authors.lastname: Rivereau
authors.forename: Hélène
authors.initials: H
authors.lastname: Zanni
mesh_terms: D003252:Construction Materials; D009682:Magnetic Resonance Spectroscopy; D010578:Petroleum; D016062:Porosity; D011522:Protons; D012492:Salts
chemical_list: D010578:Petroleum; D011522:Protons; D012492:Salts; C017082:brine