METHOD OF DETERMINING INCLINATION ANGLES OF REFLECTING BOUNDARIES IN A GEOLOGICAL ENVIRONMENT FROM PROFILE SEISMIC SURVEY DATA 2D

摘要

FIELD: measurement technology.;SUBSTANCE: disclosed is a method of determining inclination angles of reflecting boundaries in a geological environment from 2D profile seismic survey data. Method can be used at the stage of detailed processing of seismic exploration materials made by the method of multiple overlapping. Essence of the proposed method consists in the fact that for each CSP point, which can coincide with the CDP points on the research profile, forming new seismograms with asymmetry coefficient a, characterized by that removal of l₁ of excitation position EP from point of CSP formation of this seismogram and removal of l₂ of receiver position RP from same point differ from each other in specified number of times, determined by parameter value a. Standard kinematic corrections for normal removal are calculated and introduced into routes of formed seismograms. Further, a linear kinematic correction describing individual angular kinematic shifts is input to each seismic area. In the process of controlled direct analysis of transformed seismograms, a set of routes (PNA sonogram) is formed, containing information on the position on the time axis and on inclination of the coherent axes of the reflected seismic waves in the form of amplitude growths. This information enables to obtain values of inclination angles of reflecting boundaries in design points of the survey profile as a function of time.;EFFECT: increased accuracy and informativeness of the data.;1 cl, 6 dwg