Wettability Contrasts in Kaolinite and Illite Clays : Characterization by Infrared and X-ray Absorption Spectroscopies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal de Physique IV Proceedings Année : 1997

Wettability Contrasts in Kaolinite and Illite Clays : Characterization by Infrared and X-ray Absorption Spectroscopies

J.-L. Bantignies
  • Fonction : Auteur
C. Cartier Dit Moulin
H. Dexpert
  • Fonction : Auteur

Résumé

A reservoir rock is a porous geological formation in contact with two liquids : brine and oil. An improved knowledge of rock wettability is of primary importance to estimate the amount of crude oil in underground resources. The petroleum industries have observed that wettability contrasts in sedimentary reservoir rocks are largely correlated to the presence of clays (illite and/or kaolinite) in the rock's intergranular space. More precisely, the grain surfaces of illite show a preference to brine. Kaolinite preferentially adsorbs oil, which imparts its hydrophobic characteristics to the mineral surface. Using X-ray absorption and Fourier Transform Infrared spectroscopies, we studied at the atomic level the adsorption process of asphaltenes in the presence of water. We show experimentally that the wettability contrasts observed in kaolinite and illite are related to structural differences between these two clays and we show the primordial role of the grain surface hydroxyls. At last, the role of the water in the asphaltenes adsorption process has been investigated, using the same spectroscopies.

Domaines

Articles anciens
Fichier principal
Vignette du fichier
ajp-jp4199707C261.pdf (172.32 Ko) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

jpa-00255344 , version 1 (04-02-2008)

Identifiants

Citer

J.-L. Bantignies, C. Cartier Dit Moulin, H. Dexpert. Wettability Contrasts in Kaolinite and Illite Clays : Characterization by Infrared and X-ray Absorption Spectroscopies. Journal de Physique IV Proceedings, 1997, 7 (C2), pp.C2-867-C2-869. ⟨10.1051/jp4:1997261⟩. ⟨jpa-00255344⟩

Collections

AJP
38 Consultations
479 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More