PARAMETRIC METHOD OF COMPENSATION FOR NEAR-SURFACE HETEROGENEITY IN PROCESSING CDP DATA
A.P. Sysoev, G.D. Gorelik
a:2:{s:4:"TEXT";s:80:"National Mining University “Gornyi”, 21 liniya 2, St. Petersburg, 199106, Russia";s:4:"TYPE";s:4:"text";}
Keywords: Seismic reflection method, near-surface heterogeneity, variable ground surface topography, root-mean-square velocity
Subsection: GEOPHYSICS
Abstract
Compensation for near-surface heterogeneity is an important part of the seismic reflection method. The problem is solved by continuing the observed wavefield to a horizontal datum. Traditionally, two reflection traveltime curves determined from survey and datum lines are related by static shift corrections. In this paper, we solve a continuation problem in which the relation between the traveltimes of the observed and continued wavefields is given by the root-mean-square velocity equation for a two-layer earth model. A comparative analysis is made for the two methods of compensation for surface heterogeneity due to the variable altitude of the ground surface.
|
