| 摘要 |
FIELD: physics. ^ SUBSTANCE: seismic profiles are arranged along long axes of cupolas and moulds circling them. A closed polygon of profiles is formed. The array length of radiators is oriented along the long axes of cupolas and moulds circling them or across them. Elastic oscillations are successively stimulated in source points and reflected waves are registered in receiving points. On each profile, intervals are marked in the geologic section, bringing about distortion in the kinematics of the wave field. For each interval, the type of registered waves is determined, present in the wave field, and the position of boundaries in the geologic environment, from which elastic oscillations are reflected. The effective velocities of elastic oscillations are established from the hodograph curve of reflected waves. Changes in effective velocities are deduced from the depth and along wave reflection pattern. Intervals with consistent velocity gradient are marked out. Effective and interval velocities depth and sides are simultaneously correlated. The interval section with maximum distortion of kinematic parameters of the wave filed is established, and horizontal conventional surfaces are arranged lower the boundary with distorted kinematics. Within each interval with distorted kinmatics, correcting adjustments are determined for source points, with consideration of their change depending on the depth of horizontal surfaces. Defined adjustments are introduced into the seismogram. The obtained seismograms are arranged in order corresponding to the order of their registration by a continuous multifold profiling observation system. Based on the obtained data, time cross sections are constructed. ^ EFFECT: more efficient seismic prospecting. |
