(19)
(11)EP 2 829 896 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
16.03.2016 Bulletin 2016/11

(43)Date of publication A2:
28.01.2015 Bulletin 2015/05

(21)Application number: 14150975.2

(22)Date of filing:  13.01.2014
(51)Int. Cl.: 
G01V 1/18  (2006.01)
G01V 1/16  (2006.01)
G01D 3/028  (2006.01)
G01V 1/36  (2006.01)
G01V 1/24  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30)Priority: 25.07.2013 US 201313950747

(71)Applicant: Sercel, Inc.
Houston, Texas 77084-5935 (US)

(72)Inventor:
  • Amerine, Marvin K.
    Lake Jackson, TX 77566 (US)

(74)Representative: L'Helgoualch, Jean et al
Ipsilon Brema-Loyer Le Centralis 63, avenue du Général Leclerc
92340 Bourg-la-Reine
92340 Bourg-la-Reine (FR)

  


(54)Temperature compensation for seismic sensor and for method of acquisition of a seismic signal


(57) A seismic sensor detects a characteristic of a medium during a seismic survey. The seismic sensor includes a casing (302); a magnet (304) located inside the casing (302); a coil assembly (306) located inside the casing (302), wherein the coil assembly (306) moves relative to the magnet (304); and a temperature-sensitive device (320) connected to terminals (310) of the coil assembly (306) and configured to improve the damping. The magnet (304) and the coil assembly (306) produce some intrinsic damping and the additional damping introduced by the temperature-sensitive device (320) is selected to counterbalance the temperature-dependent intrinsic damping so that a phase of a recorded seismic signal is compensated for temperature induced magnetic field changes.