METHOD FOR SEISMIC EXPLORATION Russian patent published in 2009 - IPC G01V1/00 G01V1/36 

FIELD: instrumentation.

SUBSTANCE: invention refers to seismic exploration field and can be used during oil and gas field exploration. Essence: in each source position base of emitters L_e is selected the directivity of which is set in accordance with intensity of reflected wave recorded from boundary embedded at minimum depth of exploration. In field conditions the base of seismic receivers L_f is selected from condition of hit of reflections from all boundary lines to be studied into bandwidth of transmitters-receivers system. All reflecting boundaries are studied by method of common depth point with constant, selected for embedded at minimum depth boundary bases of emitter grouping and with seismic receivers grouping base. For all boundary lines to be studied, apparent speeds V* are calculated depending on reflection recording times T₀ and emitter-receiver distances X_"пв-пп" with increment equal to interval between receiving points. V* values distribution diagrams are built in the plane T₀, X_"пв-пп". Amplitude spectra for recorded seismic datasets are calculated. Dominant frequencies distribution diagrams are built in the plane T₀, X_"пв-пп". For all reflecting boundaries to be studied, values are calculated and diagrams are built for distribution of extreme grouping bases L_max providing gating of primary reflections and noise suppression. Field seismograms are combined with maximum, divisible by L_min, but not exceeding L_max bases for all T₀ and X_"пв-пп". Processing is performed using methods generally accepted for common-depth-point method.

EFFECT: increasing processibillity of field works and quality of seismic data.

4 dwg., 1 tbl.