Title:
METHOD FOR REGRESSION ANALYSIS OF FORMATION PARAMETERS
Document Type and Number:
WIPO Patent Application WO2003104602
Kind Code:
A3
Abstract:
A method of performing a formation rate analysis from pressure and formation flow rate data. Pressure and flow rate data are measured as fluid is withdrawn from a formation. Variable system volume is accounted for. The pressure and flow rate data are correlated using a multiple linear regression technique. Time derivative terms related to pressure and flow rate are smoothed using a summation technique, thereby providing better correlations than using the time derivatives directly. Formation parameters comprising formation permeability, formation pressure, and fluid compressibility may be determined from the correlation.
Inventors:
KRUEGER SVEN
NIEMEYER EICK
MEISTER MATTHIAS
NIEMEYER EICK
MEISTER MATTHIAS
Application Number:
PCT/US2003/018050
Publication Date:
March 25, 2004
Filing Date:
June 06, 2003
Export Citation:
Assignee:
BAKER HUGHES INC (US)
International Classes:
E21B49/00; (IPC1-7): E21B49/00; G01V1/36
Foreign References:
| US5708204A | 1998-01-13 | |||
| US20020060094A1 | 2002-05-23 | |||
| EP0295893A2 | 1988-12-21 | |||
| US4483187A | 1984-11-20 |
Other References:
ONUR M. & REYNOLDS A.: "Nonlinear Regression: The information Content of Pressure and Pressure-derivative Data", SPE 71579, 30 September 2001 (2001-09-30), XP002256559
ONUR M. & KUCHUK F.: "Integrated Nonlinear Regression Analysis of Multiprobe Wireline Formation Tester", SPE 56616, 3 October 1999 (1999-10-03), XP002256560
ONUR M. & KUCHUK F.: "Integrated Nonlinear Regression Analysis of Multiprobe Wireline Formation Tester", SPE 56616, 3 October 1999 (1999-10-03), XP002256560
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