System and method for identification of hydrocarbons using...

Details System and method for identification of hydrocarbons using... System and method for identification of hydrocarbons using...

G - Physics

01

V

G01V 3/14 (2006.01) G01N 24/08 (2006.01) G01R 33/44 (2006.01) G01V 3/32 (2006.01)

Patent

CA 2324015

A method and system is disclosed for the separation of fluid phases in NMR borehole (107) measurements. The invention is specifically applicable to separation of brine from hydrocarbons, using enhanced diffusion to establish an upper limit for the T2 spectral distribution of the brine. Parameters that can be modified to enhance the diffusion relaxation during the measurements include the inter-echo spacing TE and the magnetic field gradient G (110) of the measurement tool.

L'invention porte sur une méthode et le système associé de séparation de phases liquides lors de mesures par RMN dans des puits (107). L'invention s'applique particulièrement à la séparation de la saumure d'avec les hydrocarbures en recourant à une diffusion renforcée pour fixer une limite supérieure à la distribution spectrale T2 de la saumure. Les paramètres modifiables en vue du renforcement de la relaxation par diffusion lors de la mesure comprennent l'espacement entre échos TE, et le gradient de champ magnétique G (110) de l'outil de mesure.

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