PROCEDURE OF WAVE ACOUSTIC LOGGING Russian patent published in 2002 - IPC

FIELD: geophysical methods of examination of holes. SUBSTANCE: acoustic waves are cyclically excited in specified points of hole by monopolistic source. Longitudinal and lateral waves are recorded by two receivers as minimum spaced apart along shaft of hole. Acoustic signal corresponding to time of event of longitudinal wave from first receiver by time of recording is registered. Spatial-time charts into which routes kinematic corrections equal to times of event of this signal are entered are formed. First phases of vibration following directly last rectilinear axes of coincidence of longitudinal waves identified as lateral waves are highlighted on formed charts. Times of events of these phases are found on spatial-time charts and interval times of propagation of lateral waves are determined by their difference. Interval times of run of longitudinal waves are determined by their events on spatial-time charts formed by acoustic signals coming from receivers following first receiver by time of recording. EFFECT: increased authenticity of isolation and accuracy of determination of parameters of lateral waves. 3 dwg