WO 2012/ A3. 15 November 2012 ( ) P O P C T

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1 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2012/ A3 15 November 2012 ( ) P O P C T (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every G01 V1/37 ( ) G01 V1/42 ( ) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, (21) International Application Number: PCT/NO20 12/ 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, (22) International Filing Date: HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, 9 May 2012 ( ) KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, (25) Filing Language: English OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, (26) Publication Language: English SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: 61/484,043 9 May ( ) US (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, (71) Applicant (for all designated States except US): SURF GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, TECHNOLOGY AS [NO/NO]; c/o Innovasjonssenter UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, Gl0shaugen, Richard Birkelands vei 2B, N-7034 Trond- TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, heim (NO). 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, (72) Inventors; and TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, (75) Inventors/Applicants (for US only): ANGELSEN, Bjorn ML, MR, NE, SN, TD, TG). A.J. [NO/NO]; Bugges veg 4B, N Trondheim (NO). FJ^R, Erling [NO/NO]; Moltmyra 115A, N-7091 Trond Published: heim (NO). B0, Ketil [NO/NO]; Viktor Baumanns vei 2 IE, N-7020 Trondheim (NO). with international search report (Art. 21(3)) before the expiration of the time limit for amending the (74) Agent: ACAPO AS; P.O. Box 1880 Nordnes, N-5817 claims and to be republished in the event of receipt of Bergen (NO). amendments (Rule 48.2(h)) (54) Title: FORWARD LOOKING SEISMICS FROM DRILL-BIT [Continued on next page] (57) Abstract: Methods and instrumentation 101 for detecting and representing at least one l o geologic formation in front of an operating 105 drill-bit using the vibration noise generated by the operating drill-bit as a source, com prising at least one receiver array comprising more than one receiver vibration sensor ele ments, said at least one receiver array are loc ated in one or both of i) at least one receiver well, and ii) submerged in water for sub-sea operation, and beam forming at least one re ceived signal from the signals from said more than one receiver elements of said at least one receiver array, and forming at least one refer ence signal representing the vibrations of the operating drill-bit, and correlating said at least one received signal with said at least one reference signal with different correlation lags, and forming a seismic representation of the at least one geologic formation in front of the drill-bit through said correlating.

2 w o 2012/ \ llll II II 11III II I I II I II III 1 11III III II (88) Date of publication of the international search report: 3 0 May

3 I NV. G91V 1/37 G0 1V1/42 ADD. G01V EPO- I nternal, WPI Data RECTOR J W ET AL : " The use of dri l l -bi t 1-17 energy a s a downhol e sei smi c source ", GEOPHYS I CS, SOCI ETY OF EXPLO RATI ON GEOPHYS I CI STS, US, vol. 56, no. 5, 1 May ( ), pages , XP , I SSN : , D0 I : / c i ted i n the appl i cati on f i gures 1-3, 6, 8, 9 page page 632 page 639, co umn 2, i ne 4 - l i ne 17 -/-- X I 5 Apri /04/2013 Sarton i, Gi ovann i

4 International application No C(Continuation). DOCUMENTS CONSIDERED TO BE RELEVANT Category * Citation of document, with indication, where appropriate, of the relevant passages Relevant to olaim No. Y US A (WIDROW BERNARD [US] ) July 1989 ( ) f i gures 1-5,8,9,12-20 col umn 1, l ine 5 - l ine 33 col umn 2, l ine 3 - ine 45 col umn 3, l ine 54 - column 7, l ine 49 col umn 9, l ine 9 - col umn 12, ine 4 col umn 15, i ne 9 - column 18, ine 16 col umn 20, l i ne 64 - col umn 28, l i ne 19 Y US A (NAVI LLE CHARLES [FR] ET 1-17 AL) 13 December 1994 ( ) f i gures 1-6 col umn 1, l ine 5 - l ine 30 col umn 1, l ine 66 - column 2, ine 30 col umn 2, l ine 62 - column 3, l ine 14 col umn 4, l ine 20 - l ine 41 col umn 4, l ine 65 - column 5, l ine 69 col umn 7, l ine l ine 23 A US A (RECTOR JAMES [US] ET AL) May 1990 ( ) f i gures 1-7 col umn 1, l ine 10 - l ine 22 col umn 3, l ine column 4, l ine 56 col umn 5, l ine 50 - column 7, l ine 24 col umn 9, l ine 60 - column 10, l ine 7 col umn 10, l i ne 66 - col umn 12, l i ne 27 A US 2007/ Al (HALDORSEN JAKOB B [US] 1-17 HALDORSEN JAKOB B U [US] ) 22 March 2007 ( ) f i gures 1,2 paragraphs [0001], [ 3], [0007] - [0010], [0016] - [ 20], [0022] paragraphs [0024] - [0025], [0034] - [0036]

5 International application No Patent document Publication Patent family Publication cited in search report date member(s) date US A CA C DK A EP Al NO A US A WO Al US A CN A FR Al GB A NO A US A US A NON E US Al CA Al GB A US Al