| 摘要 |
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 Le 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 Lf 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"-" with increment equal to interval between receiving points. V* values distribution diagrams are built in the plane T0, X"-". Amplitude spectra for recorded seismic datasets are calculated. Dominant frequencies distribution diagrams are built in the plane T0, X"-". For all reflecting boundaries to be studied, values are calculated and diagrams are built for distribution of extreme grouping bases Lmax providing gating of primary reflections and noise suppression. Field seismograms are combined with maximum, divisible by Lmin, but not exceeding Lmax bases for all T0 and X"-". 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. |
