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1. (WO2006020214) METHOD AND APPARATUS FOR MEASURING FORMATION CONDUCTIVITIES FROM WITHIN CASED WELLBORES
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2006/020214 International Application No.: PCT/US2005/025414
Publication Date: 23.02.2006 International Filing Date: 19.07.2005
IPC:
G01V 3/00 (2006.01) ,G01V 3/18 (2006.01) ,G01V 3/20 (2006.01)
G PHYSICS
01
MEASURING; TESTING
V
GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
G PHYSICS
01
MEASURING; TESTING
V
GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18
specially adapted for well-logging
G PHYSICS
01
MEASURING; TESTING
V
GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18
specially adapted for well-logging
20
operating with propagation of electric current
Applicants: KJT ENTERPRISES, INC.[US/US]; 1303 Warwichshire Houston, TX 77077, US (AllExceptUS)
Inventors: STRACK, Kurt, M.; US
RUETER, Horst; DE
Agent: FAGIN, Richard, A.; P.O. Box 1247 Richmond, TX 77406-1247, US
Priority Data:
10/912,58805.08.2004US
Title (EN) METHOD AND APPARATUS FOR MEASURING FORMATION CONDUCTIVITIES FROM WITHIN CASED WELLBORES
(FR) PROCEDE EST DISPOSITIF DE MESURE DES CONDUCTIVITES DE FORMATIONS DE PUITS TUBES
Abstract:
(EN) A method is disclosed for determining spatial distribution of resistivity of Earth formations surrounding a wellbore (14) having a conductive pipe (12) therein. The method includes measuring resistivity of the Earth formations using measurements of current leakage along the pipe (12) at selected axial positions. Electromagnetic properties of the Earth formations are measured from within the pipe (12). The measurements of electromagnetic properties correspond to a larger axial distance and to a greater lateral distance than the measurements of resistivity from current leakage. The current leakage and electromagnetic measurements are jointly inverted to obtain a model of the spatial distribution.
(FR) Un procédé permet de déterminer la répartition spatiale de la résistivité des formations terrestres autour d'un puits comportant un tuyau conducteur. Ce procédé consiste à mesurer la résistivité des formations terrestres sur la base des mesures de fuite de courant le long de tuyau en des points axiaux précis. Les propriétés électromagnétiques des formations terrestres sont mesurées à l'intérieur du tuyau. Les mesures des propriétés électromagnétiques correspondent à une distance axiale plus élevée et à une distance latérale plus étendue par rapport aux mesures de résistivité des fuites de courant. Les fuites de courant et les mesures électromagnétiques sont conjointement inversées pour obtenir un modèle de répartition spatiale.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)