Patent Number: 6,332,507

Title: Seismic prospecting method and device in wells allowing guided waves filtering

Abstract: A VSP or reversed VSP type seismic prospecting method according to the invention allows disturbances contained in seismic recordings produced by tube waves propagating along wells and refracted in zones close to the surface to be minimized. The method disperses a gas under pressure, having preferably a high compressibility, capable of absorbing these tube waves. The gas may be generated by an explosive chemical reaction set off in situ, at a certain depth of the well (which may constitute the seismic wave source). The method has an application for seismic prospecting or drilling noise monitoring.

Inventors: Naville; Charles (Grigny, FR), Ollivier; Yves (Lardy, FR), Laurent; Jean (Orgeval, FR), Pignard; Guy (Rueil-Malmaison, FR)

Assignee: Institut Francais du Petrole

International Classification: G01V 1/52 (20060101); G01V 1/40 (20060101); G01V 1/46 (20060101); G01V 001/40 ()

Expiration Date: 12/25/2018