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1. (WO2013154918) DISTINGUISHING MUD FILTRATE FROM FORMATION WATER BY MULTI-DOI NMR
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2013/154918 International Application No.: PCT/US2013/035359
Publication Date: 17.10.2013 International Filing Date: 05.04.2013
IPC:
G01V 3/32 (2006.01) ,G06F 19/00 (2011.01)
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
18
specially adapted for well-logging
32
operating with electron or nuclear magnetic resonance
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
19
Digital computing or data processing equipment or methods, specially adapted for specific applications
Applicants:
SCHLUMBERGER CANADA LIMITED [CA/CA]; 525-3rd Avenue Southwest Calgary, Alberta T2P-0G4, CA (CA)
SERVICES PETROLIERS SCHLUMBERGER [FR/FR]; 42 rue Saint Dominique 75007 Paris, FR (FR)
SCHLUMBERGER HOLDINGS LIMITED [GB/GB]; P.O. Box 71, Craigmuir Chambers, Road Town 1110 Tortola, Virgin Islands, British Virgin Islands, British, VG (GB, JP, NL)
SCHLUMBERGER TECHNOLOGY B.V. [NL/NL]; Parkstraat 83-89m NL-2514 JG The Hague, NL (AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BN, BR, BW, BY, BZ, CF, CG, CH, CI, CL, CM, CO, CR, CU, CY, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GA, GD, GE, GM, GN, GQ, GR, GT, GW, HN, HR, HU, ID, IE, IL, IS, IT, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MX, MY, NE, NI, NO, NZ, OM, PA, PE, PG, PL, PT, QA, RO, RS, RU, RW, SC, SE, SG, SI, SK, SL, SM, SN, ST, SV, SZ, TD, TG, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, ZA, ZM, ZW)
PRAD RESEARCH AND DEVELOPMENT LIMITED [GB/GB]; P.O. Box 71, Craigmuir Chambers, Road Town 1110 Tortola, Virgin Island, British Virgin Islands, British, VG (AE, AO, BF, BH, BJ, CF, CG, CI, CM, CN, GA, GH, GN, GQ, GW, IN, LY, MA, ML, MR, MZ, NA, NE, NG, PH, SD, SN, SY, TD, TG, VN)
SCHLUMBERGER TECHNOLOGY CORPORATION [US/US]; 300 Schlumberger Drive, Sugar Land, TX 77478, US (US)
Inventors:
DANGFA, David, Nanlung; GB
DE SANTO, Ilaria; GB
KHATTAK, Iftikhar; GB
DATIR, Harish, Baban; NO
Agent:
LIU, Kenneth; 10001 Richmond Avenue IP Administration Center of Excellence Room 4720 Houston, TX 77042, US
Priority Data:
13/804,33314.03.2013US
61/623,72013.04.2012US
Title (EN) DISTINGUISHING MUD FILTRATE FROM FORMATION WATER BY MULTI-DOI NMR
(FR) DISTINCTION ENTRE UN FILTRAT DE BOUE ET UNE EAU DE FORMATION PAR RMN MULTI-DOI
Abstract:
(EN) A nuclear magnetic resonance (NMR) measurement, at two or more depths of investigation, of a subsurface formation containing formation water and a mud filtrate from a water-base mud is obtained, and the mud filtrate is distinguished from the formation water. A NMR logging tool is disposed in a wellbore penetrating the formation containing the mud filtrate and the formation water and NMR measurements at different radial depths of investigation into the formation are made. The mud filtrate is distinguished from the formation water by determining the relative salinities of the mud filtrate and the formation water. The relative salinities are determined by comparing distribution relaxation times across different depths of investigation or by comparing logarithmic mean values across different depths of investigation.
(FR) La présente invention concerne la distinction entre un filtrat de boue et une eau de formation par l'obtention d'une mesure de résonance magnétique nucléaire (RMN) effectuée à deux ou plus de deux profondeurs d'étude dans une formation souterraine contenant de l'eau de formation et un filtrat de boue. Un outil de diagraphie RMN est disposé dans un trou de forage pénétrant la formation contenant le filtrat de boue et l'eau de formation et des mesures RMN sont effectuées dans la formation à différentes profondeurs radiales d'étude. La distinction entre le filtrat de boue et l'eau de formation est effectuée par la détermination des salinités relatives du filtrat de boue et de l'eau de formation. Les salinités relatives sont déterminées en comparant les temps de relaxation de distribution pour différentes profondeurs d'études ou en comparant des valeurs logarithmiques moyennes pour différentes profondeurs d'étude.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 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)