| 摘要 |
<p>Method for improving the coefficient of transmission to geological formations of the energy generated by the triggering of a seismic source lowered into a borehole and device for carrying it out. …<??>A borehole zone containing the seismic source is delimited by containment in such as way as to stop the propagation in the borehole, outside the contained zone, of the energy which is generated there by the seismic source when it is triggered. The containment is obtained by closing off the borehole on either side of the seismic source. Use is made of two expandable members (2, 3) arranged in the borehole on either side of the source (1) and each comprising, for example, a sleeve produced from elastomer, an annular piston, the displacement of which has the effect of dilating the sleeve, and hydraulic means for displacing the piston. …<??>The invention is used for seismic prospecting in boreholes. …<IMAGE>… </p> |
