High‐resolution common‐depth‐point reflection profiling:Field acquisition parameter design

Knapp, Ralph W.; Steeples, Don W.

doi:10.1190/1.1442088

Cited by 122 publications

(50 citation statements)

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“…Evaluating a new seismic source involves its spectral characteristics, delivered energy, efficiency, repeatability, cost, convenience and safety (Knapp and Steeples, 1986). The field tests conducted using the sledgehammer and GDP show that the GDP produces waves with higher energy and broader band of frequencies than the sledgehammer.…”

Section: Discussionmentioning

confidence: 99%

GDP: A new source for shallow high-resolution seismic exploration

Rashed

2009

Journal of Applied Geophysics

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Section: Discussionmentioning

confidence: 99%

GDP: A new source for shallow high-resolution seismic exploration

Rashed

2009

Journal of Applied Geophysics

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“…At the beginning, continuous underground coverage (1-fold coverage) was applied (Hunter et al, 1984), but also the CDPmethod (multi-fold coverage), which has been developed in a framework of deep seismic reflection applied in oil investigations (Doornenbal and Helbig, 1983;Knapp and Steeples, 1986;Miller et al, 1989). Very interesting contributions can also be found in recent publications (Steeples and Miller, 1998;Miller et al, 1998;Wiederhold et al, 1998;van der Veen et al, 2001).…”

Section: Brief Overview Of Methodsmentioning

confidence: 99%

Mapping of thin sandy aquifers by using high resolution reflection seismics and 2-D electrical tomography

Šumanovac¹

2006

Journal of Applied Geophysics

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Electrical tomography, which gives good results even in fairly complex geological environments, has given a new lease of life to electrical methods in hydrogeological surveys. Nevertheless, a rapid decline in resolution with increasing depth remains the main problem of the electrical methods. In the Pannonian basin in Croatia, at a test area, combining both electrical tomography and seismic reflection methods provides data that better constrain the lithological and hydrogeological model of the subsurface.Electrical tomography revealed a rather thick packet of sediments with increased resistivity at depths of 40-100 m. Using the electrical forward modelling, the existence of two different hydrogeological models was shown. The first model presupposes a reasonably homogeneous packet of sandy clays or clayey sands, and the other model presupposes the alternation between layers of clays and sands. From the hydrogeological point of view, the second model is perspective, but unfortunately, the use of electrical tomography alone does not allow the ambiguity to be resolved. The separation of these two models became possible using seismic reflection. Three seismic environments were isolated from the seismic profile treated, and the strongest reflections were discovered in the first seismic environment, which covers the depths from 40 to 100 m. It was determined that the second model is more acceptable, because these reflections are caused by lithological changes, that is, the alternations of sands and clays. The interpretation is consistent with exploratory borehole data. The conclusion is that electrical tomography gives data concerning the sediment lithology up to depths of 40 m, but at greater depths combined interpretation of electrical and seismic data constrains the subsurface model better. D

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“…Acquisition is carried Out using the 24-channel EGG24O1 seismograph and 100 Hz geophones which provide the low-cut filtering of the seismic data. Particular care is taken to make the correct choice of the recording geometry in regard to the markers depths [6] . A silenced betsy gun" [7] (designed in the laboratory) firing 12-gauge hunting cartridges, is used as a source.…”

Section: Methodsmentioning

confidence: 99%