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1. WO2000039612 - WATER SATURATION AND SAND FRACTION DETERMINATION FROM BOREHOLE RESISTIVITY IMAGING TOOL, TRANSVERSE INDUCTION LOGGING AND A TENSORIAL WATER SATURATION MODEL

Publication Number WO/2000/039612
Publication Date 06.07.2000
International Application No. PCT/US1999/031104
International Filing Date 29.12.1999
Chapter 2 Demand Filed 28.07.2000
IPC
G01V 3/28 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18specially adapted for well-logging
26operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
28using induction coils
G01V 11/00 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
11Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/-G01V9/147
CPC
G01V 11/00
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
11Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
G01V 3/28
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
3Electric or magnetic prospecting or detecting
18specially adapted for well-logging
26operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
28using induction coils
Applicants
  • BAKER HUGHES INCORPORATED [US/US]; 10205 Westheimer Road Houston, TX 77042-3115, US
Inventors
  • MOLLISON, Richard, A.; US
  • SCHOEN, Juergen, H.; AT
  • FANINI, Otto, N.; US
  • KRIEGSHAUSER, Berthold, F.; US
  • PAVLOVIC, Milomir; US
Agents
  • SPRINGS, Darryl, M.; Division Patent Counsel-Baker Atlas Division P.O. Box 1407 Houston, TX 77251-1407, US
  • RIDDLE, Albert, J. ; Baker Hughes Incorporated 3900 Essex Lane Suite 1200 Houston, TX 77027, US
Priority Data
09/222,96730.12.1998US
60/160,94322.10.1999US
null28.12.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) WATER SATURATION AND SAND FRACTION DETERMINATION FROM BOREHOLE RESISTIVITY IMAGING TOOL, TRANSVERSE INDUCTION LOGGING AND A TENSORIAL WATER SATURATION MODEL
(FR) DETERMINATION DE LA SATURATION EN EAU ET D'UNE FRACTION DE SABLE A PARTIR D'UN OUTIL D'IMAGERIE DE LA RESISTIVITE DES PUITS DE FORAGE, D'UNE DIAGRAPHIE PAR INDUCTION TRANSVERSALE ET D'UN MODELE TENSORIEL DE SATURATION EN EAU
Abstract
(EN)
The total porosity the formation, (13), including a fractional volume of the shale (13), and a resistivity of the shale are determined (22), in a laminated reservoir including sands that may have dispersed shales therein. A tensor petrophysical model determines the laminar shale volume and laminar sand conductivity from vertical and horizontal conductivities derived from multi-component induction log data (10). The volume of dispersed shale and the total and effective porosities of the laminar sand fraction are determined using a Thomas-Stieber-Juhasz approach. Removal of laminar shale conductivity and porosity effects reduces the laminated shaly sand problem to a single dispersed shaly sand model to which the Waxman-Smits equation can be applied.
(FR)
L'invention concerne un procédé permettant de déterminer (22) la porosité totale d'une formation (13), un volume fractionnel du schiste dans ladite formation (13) ainsi que la résistivité dudit schiste, dans un réservoir stratifié comprenant des sables dans lesquels du schiste peut être dispersé. Un modèle pétrophysique tensoriel permet de déterminer le volume de schiste laminaire et la conductivité du sable laminaire à partir des conductivités verticale et horizontale déduites des données (10) multi-composant de la diagraphie par induction. Le volume du schiste dispersé et les porosités totale et effective de la fraction de sable laminaire sont déterminés à l'aide de la technique Thomas-Stieber-Juhasz. L'élimination de la conductivité du schiste laminaire et des effets de la porosité permet de ramener les problèmes posés par le sable schisteux laminaire à un seul modèle de sable schisteux dispersé auquel on peut appliquer l'équation de Waxman-Smits.
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