Process and device for installing seismic sensors inside a petroleum production well

摘要

A process for installing seismic sensors inside a petroleum production well equipped with a cemented casing involves arranging the seismic sensors along an outer surface of the casing before being descended into a drilled well and cementing a ring-shaped space between the casing and the well so as to acoustically connect the sensors to geological formations. The sensors and transmission cables which link them to the surface are secured to centering devices guiding the descent of the casing or to the casing outer wall, possibly by means of a coating of damping material. The sensors may be inserted into sleeves secured outside the casing.