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1. (WO2019032567) METHOD AND APPARATUS OF NEAR-BET RESISTIVITY FOR LOOKING-AHEAD
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/032567 International Application No.: PCT/US2018/045580
Publication Date: 14.02.2019 International Filing Date: 07.08.2018
IPC:
G01V 3/26 (2006.01) ,G01V 3/38 (2006.01) ,E21B 47/01 (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
18
specially adapted for well-logging
26
operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
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
38
Processing data, e.g. for analysis, for interpretation or for correction
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
47
Survey of boreholes or wells
01
Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
Applicants:
BAKER HUGHES, A GE COMPANY, LLC [US/US]; 17021 Aldine Westfield Houston, TX 77073, US
Inventors:
FANG, Sheng; US
Agent:
CARSON, Matt, W.; US
Priority Data:
15/670,83707.08.2017US
Title (EN) METHOD AND APPARATUS OF NEAR-BET RESISTIVITY FOR LOOKING-AHEAD
(FR) PROCÉDÉ ET APPAREIL DE RÉSISTIVITÉ QUASI-BET POUR ANTICIPATION
Abstract:
(EN) Systems, methods, and devices for evaluation of an earth formation intersected by a borehole using a logging tool. Tools include sensor assemblies with permanent magnets mounted at a first radial distance from an axis of rotation of the sensor assembly, as well as receiver sensors. The sensor assembly is configured to generate an alternating current in a volume of interest of the formation surrounding the borehole with a time varying magnetic field in the volume produced by rotating the sensor assembly about the axis of rotation. Methods include making EM signal measurements or magnetic field measurements with receiver sensors responsive to the alternating current and estimating at least a formation property of the volume using the measurements.
(FR) La présente invention concerne des systèmes, des procédés et des dispositifs pour l’évaluation d’une formation terrestre traversée par un trou de forage au moyen d’un outil de diagraphie. Des outils comprennent des ensembles capteurs avec des aimants permanents montés à une première distance radiale d'un axe de rotation de l'ensemble capteur, ainsi que des capteurs récepteurs. L'ensemble capteur est conçu pour générer un courant alternatif dans un volume d'intérêt de la formation qui entoure le trou de forage avec un champ magnétique variant dans le temps dans le volume produit par rotation de l'ensemble capteur autour de l'axe de rotation. Les procédés comprennent la réalisation de mesures de signal EM ou de mesures de champ magnétique avec des capteurs récepteurs en réponse au courant alternatif et l'estimation d'au moins une propriété de formation du volume à l'aide des mesures.
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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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, 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, SA, 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, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)