ON THE MIGRATION OF THE PARAFFINS AND ISOPRENOIDS WITHIN CRUDE OILS SUBMITTED TO THERMOGRAVITATIONAL DIFFUSION IN POROUS-MEDIUM

Authors
COSTESEQUE P ELMAATAOUI M PLIQUE J
Citation
P. Costeseque et al., ON THE MIGRATION OF THE PARAFFINS AND ISOPRENOIDS WITHIN CRUDE OILS SUBMITTED TO THERMOGRAVITATIONAL DIFFUSION IN POROUS-MEDIUM, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 320(4), 1995, pp. 265-271
Citations number
6
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie → ACNP
ISSN journal
12518069
Volume
320
Issue
4
Year of publication
1995
Part
2
Pages
265 - 271
Database
ISI
SICI code
1251-8069(1995)320:4<265:OTMOTP>2.0.ZU;2-L
Abstract
Vertical stratifications of different hydrocarbons appear within crude oils submitted to thermal gradients and thus to thermogravitational d iffusion in porous medium. Concentration gradients, specific to each s pecies, depend on molecular mass and structural characteristics. The d ifferential enrichment of n-paraffins in comparison with isoprenoids h as been measured in the top of porous columns. As the pristane and phy tane isoprenoids are equally concentrated, the characteristic ratio pr istane/phytane (a geochemical marker) remained identical.