Abstract:

Geophone array receiving can greatly improve the signaltonoise ratio of data in some complex terrain and interference wave development areas. This kind of array uses more than one geophone to receive seismic wave at the same time as the input of a seismic trace. It suppresses interference wave mainly using the difference of the propagation direction between the effective wave and interference wave. We promote combinatorial theory from the plane to the undulating surface based on the theory and method of geophone array. We discusses the response of geophone array in the undulating surface and compared the response of effective wave and interference wave after the geophone array filter. Through the analysis，the suppression degree of interference wave is increased gradually with the increase of tilt when interference wave spreads along the up dip direction in undulating surface area. And the suppression degree of interference wave is increased gradually when interference wave spreads along the down dip direction. At the end of the article, the geophone interval of geophone array was optimized with inversion method. In the case of that geophone array direction characteristics are known, we can get the geophone interval that is matched. More numerical calculations shows that the response of effective wave is significantly higher than that of interference wave in geophone array filtered seismic data.

Key words: geophone array, seismic prospecting, combination receiving