SEISMIC CREW SURVEY — MAY
SEG’s May 1977 survey of oil companies and domestic contractors shows a total of 301 seismic land crews and marine vessels operating in the U.S. and U.S. waters. This is the first time since February 1975 that the figure has risen above the 300 mark (Figure 1). This total is 22 percent above May 1976, 5 percent above May 1975, but still 4 percent below May 1974. Comparative figures of U.S. land crews and marine vessels are given in Table 1. Seismic crew data for May 1977 in Canada are shown in Table 2.
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1992 ◽
Vol 52
(1)
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pp. 41-60
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2005 ◽
Vol 8
(06)
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pp. 520-527
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