Abstract
Without further specification, the word ‘deep’ in connection with a seismic survey has no precise meaning: applied loosely, it means just ‘deeper than most surveys’. A seismic section or a seismogram without time scale contains no clue to the depth of the reflectors or the total time. As a matter of fact, the conceptual difficulties to expand the state-of-the-art to shallower reflections are just as large as those for the expansion to deeper reflections. That does not mean that the technological difficulties are of comparable magnitude: the main message of this article is that nearly everything in exploration seismics can be scaled. But expansion to greater depth requires larger sources with greater total energy, greater offsets with longer cables, and larger receiver groups. Such changes are more expensive than a change to smaller scale.
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Helbig, K., Schmoll, J. (1984). Potential and Constraints of Near Vertical Reflection Seismics in Non-Sedimentary Deep Formations. In: Cassinis, R. (eds) Problems and Methods for Lithospheric Exploration. Ettore Majorana International Science Series. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2373-0_7
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