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DIFFERENT METHODS OF TIME‐DEPTH CONVERSION WITH AND WITHOUT MIGRATION *
Author(s) -
PATURET DANIEL
Publication year - 1971
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1971.tb00584.x
Subject(s) - interval (graph theory) , regional geology , domain (mathematical analysis) , time domain , environmental geology , geology , computer science , economic geology , algorithm , metamorphic petrology , geodesy , hydrogeology , mathematics , mathematical analysis , geotechnical engineering , combinatorics , computer vision
A bstract The increasing use of velocity analysis programs in seismic processing in addition to direct application to normal move out corrections often makes it possible to study the variation of the average velocity versus time and distance. Usually, it is even feasible to compute interval velocities with a good accuracy. We intend to use these velocities to convert the usual time domain displays to the depth domain. An exact conversion requires the knowledge of all interval velocities and all the velocity interfaces. However, when the dips are small, the conversion can be done without considering the dip of all these interfaces, and in some cases migration can even be completely neglected. Three different programs will be described and their use discussed in view of the type of problems to which they are applied. Practical examples of the various methods will be presented.