| 摘要 |
<p>Method of acquisition and processing of seismic data used in the scope of repetitive monitoring of the movement of the fluids impregnating a reservoir (1) located at depth in the subsoil. According to the invention, it includes the steps consisting in arranging, at each point of a predetermined grid at the surface, a vertical and shallow hole (100) in the subsoil above the reservoir, which passes through the surface change (weathering) region (2); vertically positioning, in each hole, fixed receivers (101, 102, 103, 104, 105, 106, 107, 108) intended to be separately connected to a recorder (300) placed at the surface; emitting, close to the vertical of each hole, seismic waves into the subsoil by means of a source (200) placed at the surface; recording, for each hole, using the receivers, the direct incident seismic waves (10) and the seismic waves (20) reflected at the interfaces of the deep layers, each receiver supplying a separate recording of one incident wave and several reflected waves; deconvolving, receiver by receiver, the reflected waves with respect to the direct incident waves, in order to obtain a 0-phase trace for each receiver; adding the 0-phase traces coming from the receivers in order to obtain a 0-phase trace with 0 offset and low overlap. Application in the field of applied geophysics. <IMAGE></p> |
