A Pneumatic Seismic Energy Source for Shallow-Water/Marsh Areas

1969 ◽  
Author(s):  
E.C. Brede ◽  
H.L. Viger ◽  
R.C. Johnston ◽  
L.B. Sullivan
Keyword(s):  
Energy Source ◽  
Shallow Water ◽  
Seismic Energy

A PNEUMATIC SEISMIC ENERGY SOURCE FOR SHALLOW WATER / MARSH AREAS*

1970 ◽  
Vol 18 (4) ◽  
pp. 581-599 ◽  
Author(s):  
E. C. BREDE ◽  
R. C. JOHNSTON ◽  
L. B. SULLIVAN ◽  
H. L. VIGER
Keyword(s):  
Energy Source ◽  
Shallow Water ◽  
Seismic Energy

scholarly journals Deep seismic profiling in central West Greenland

1990 ◽  
Vol 148 ◽  
pp. 35-37
Author(s):  
P Skjellerup ◽  
S.B Smithson ◽  
H.C Larsen
Keyword(s):  
Energy Source ◽  
Seismic Energy ◽  
High Grade ◽  
Seismic Structure ◽  
West Greenland ◽  
Seismic Profiling ◽  
Marine Air

During September 1989 a survey of the Godthåbsfjord area was carried out in order to study the deep seismic structure of high-grade Archaean crust (Bridgwater et al., 1976; McGregor et al., 1986). Refraction profiles were made along Godthåbsfjord and Ameralik. Receiver stations were placed along the fjords and inland to provide cross-profiles and 3-D coverage (fig. 1). Marine air-guns provided the seismic energy source.

A LOW‐NOISE SEISMIC METHOD FOR USE IN PERMAFROST REGIONS

Geophysics ◽  
1971 ◽  
Vol 36 (6) ◽  
pp. 1150-1161 ◽  
Author(s):  
H. M. Rackets
Keyword(s):  
Energy Source ◽  
Conventional Method ◽  
Ground Surface ◽  
Seismic Energy ◽  
Low Noise ◽  
Point Of View ◽  
Light Weight ◽  
Operational Parameters ◽  
Seismic Method ◽  
Permafrost Regions

Dynamite charges of ten lb or greater detonated in permafrost regions at depths less than fifty ft below the ground surface tend to create frost breaks, a phenomenon of strong seismic energy from an outward flow of minute cracks in the permafrost caused by the detonation. The frost breaks obliterate reflected energy arriving at the same time. A seismic method was devised which minimizes frost breaks and allows a reduction of the massive equipment currently required either to drill shotholes or for the application of a nondynamite surface energy source. Advantages expected for the method are a cost reduction of 10 percent or more by reduction of drilling equipment and the ability to employ light‐weight portable seismic crews in remote areas without large mileage programs (300 to 500 miles) being necessary to justify the cost of introducing a crew. Also, light‐weight portable crews could be used to determine optimum operational parameters in virgin areas. Since dynamite is the most concentrated available energy source, a seismic experiment was conducted by detonating individual one‐lb dynamite charges at depths 5 ft below the permafrost surface. To maximize the number of small charges, they were detonated at each geophone location (156 one‐lb shotpoint locations per mile). On a total energy per mile basis, the energy from the small charges compares favorably with the energy expended by the conventional method of [Formula: see text] 25‐lb shotpoint locations per mile or [Formula: see text] lb. The reflected energy was recorded digitally and processed by applying vertical summing plus 12‐fold horizontal CDP stacking. The total profile distance was sufficient to allow for one‐half mile of fully stacked subsurface coverage. The experimental results compare favorably with those from the conventional method, and the small charges detonated at shallow depths were safe both from the point of view of human safety and ecological care.

THEORETICAL STUDIES RELATED TO THE DETERMINATION OF SEISMIC ENERGY SOURCE DEPTH

1964 ◽  
Author(s):  
T. W. Spencer ◽  
W. L. Baler ◽  
J. W. Sherwood ◽  
D. P. Squier ◽  
R. D. Tooley
Keyword(s):  
Energy Source ◽  
Seismic Energy ◽  
Theoretical Studies ◽  
Source Depth

Broadband seismic energy source

1981 ◽  
Vol 70 (3) ◽  
pp. 916-916
Author(s):  
Richard M. Weber ◽  
John W. Bedenbender
Keyword(s):  
Energy Source ◽  
Seismic Energy

scholarly journals A Gaussian explosion seismic energy source

2011 ◽  
Author(s):  
David F. Aldridge ◽  
Thomas M. Smith ◽  
S. Scott Collis
Keyword(s):  
Energy Source ◽  
Seismic Energy
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