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1. (WO2014199300) SEISMIC CABLE, SYSTEM AND METHOD FOR ACQUIRING INFORMATION ABOUT SEISMIC, MICROSEISMIC AND MECHANICAL VIBRATION INCIDENTS IN A WELL

Pub. No.:    WO/2014/199300    International Application No.:    PCT/IB2014/062101
Publication Date: Fri Dec 19 00:59:59 CET 2014 International Filing Date: Wed Jun 11 01:59:59 CEST 2014
IPC: G01V 1/40
G01V 1/18
G01V 1/22
E21B 47/12
Applicants: READ AS
Inventors: KJOS, Tore
Title: SEISMIC CABLE, SYSTEM AND METHOD FOR ACQUIRING INFORMATION ABOUT SEISMIC, MICROSEISMIC AND MECHANICAL VIBRATION INCIDENTS IN A WELL
Abstract:
A seismic sensor cable 10 for lowering into a subterranean well 15 for acquiring information about seismic, microseismic and mechanical vibration incidents in the subterranean well 15, where the device comprises a first portion 20 that is elongate and has a first length with a proximal end and a distal end that are to be lowered down into a lower part of the subterranean well 15, the first portion 20 having a plurality of electric or electromechanical multicomponent seismic sensors 25 that are connected and distributed over large parts of its first length, and wherein the seismic profiling device 10 further comprises a second portion 30 that is elongate and has a second length with a proximal end that is to be held above the subterranean well 15 and a distal end that is to be lowered down into the upper part of the subterranean well 15, said second portion 30 comprising an optical fibre 35 that runs along large parts of said second portion 30, and an electric cable 40 for conducting electric power from the proximal end to said seismic sensors in the first portion 20, and a connector 45 for connecting the proximal end of the first portion 20 to the distal end of the second portion 30. The invention also comprises a system and a method for acquiring information about seismic, microseismic and mechanical vibration incidents in the subterranean well 15.