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1. (WO2018013049) LEAK LOCALIZATION USING ACOUSTIC-SIGNAL CORRELATIONS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2018/013049 International Application No.: PCT/SG2016/050325
Publication Date: 18.01.2018 International Filing Date: 12.07.2016
IPC:
G01M 3/24 (2006.01) ,G01B 5/18 (2006.01) ,G06F 17/10 (2006.01)
G PHYSICS
01
MEASURING; TESTING
M
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
3
Investigating fluid tightness of structures
02
by using fluid or vacuum
04
by detecting the presence of fluid at the leakage point
24
using infrasonic, sonic, or ultrasonic vibrations
G PHYSICS
01
MEASURING; TESTING
B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
5
Measuring arrangements characterised by the use of mechanical means
18
for measuring depth
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
17
Digital computing or data processing equipment or methods, specially adapted for specific functions
10
Complex mathematical operations
Applicants:
ANG, Yi Yang [SG/SG]; SG
NGUYEN, Nam [VN/SG]; SG
LU, Yinghui [CN/US]; US
TAWARE, Avinash Vinayak [US/US]; US
JAGANNANTHAN, Srinivasan [IN/US]; US
HALLIBURTON ENERGY SERVICES, INC. [US/US]; 3000 N. Sam Houston Parkway E. Houston, Texas 77032, US
Inventors:
ANG, Yi Yang; SG
NGUYEN, Nam; SG
LU, Yinghui; US
TAWARE, Avinash Vinayak; US
JAGANNANTHAN, Srinivasan; US
Agent:
MIRANDAH ASIA (SINGAPORE) PTE LTD; 1 Coleman Street #07-08, The Adelphi Singapore 179803, SG
Priority Data:
Title (EN) LEAK LOCALIZATION USING ACOUSTIC-SIGNAL CORRELATIONS
(FR) LOCALISATION DE FUITES À L'AIDE DE CORRÉLATIONS DES SIGNAUX ACOUSTIQUES
Abstract:
(EN) Disclosed are acoustic logging systems and methods that involve correlating broadband acoustic signals acquired by a plurality of acoustic sensors at multiple depths within a wellbore to compute covariance matrices and their eigenvalues in the frequency domain for a plurality of frequency bins. In accordance with various embodiments, acoustic sources are detected and located based on the eigenvalues viewed as a function of depth and frequency.
(FR) L'invention concerne des systèmes et des procédés de diagraphie acoustique qui impliquent la corrélation de signaux acoustiques à large bande acquis par une pluralité de capteurs acoustiques à de multiples profondeurs à l'intérieur d'un puits de forage afin de calculer des matrices de covariance et leurs valeurs propres dans le domaine fréquentiel pour une pluralité de segments de fréquence. Selon divers modes de réalisation, des sources acoustiques sont détectées et localisées à partir des valeurs propres visualisées en fonction de la profondeur et de la fréquence.
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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, IR, IS, JP, KE, KG, KN, KP, KR, 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 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, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)