SU792187A1 - Method of exciting seismic signals in water - Google Patents
Method of exciting seismic signals in water Download PDFInfo
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- SU792187A1 SU792187A1 SU792713876A SU2713876A SU792187A1 SU 792187 A1 SU792187 A1 SU 792187A1 SU 792713876 A SU792713876 A SU 792713876A SU 2713876 A SU2713876 A SU 2713876A SU 792187 A1 SU792187 A1 SU 792187A1
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- water
- signal
- source
- seismic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Description
54) СПОСОБ ВОЗБУЖДЕНИЯ СЕЙСМИЧЕСКОГО СИГНАЛА В ВОДЕ54) METHOD OF EXCITING SEISMIC SIGNAL IN WATER
1one
Изобретение относитс к сейсмически исследовани м акваторий и может быть использовано при проведении работ на мелководье.The invention relates to seismic study of water areas and can be used when working in shallow water.
Известен способ возбуждени сейсмического сигнала в воде при работе на мелководье с производством как одиночных, так и групповых источников Щ. Однако при работе на мелководье , когда глубина погружени источника ограничена, происходит уменьшение длительности фазы сжати сигнала за счет волны, отраженной от поверхности воды. При этом уменьшаетс энерги сигнала, а максимум первого лепестка амплитудного спектра,определ емый временем запаздывани отраженной от поверхности воды в.олны, смещаетс в область высоких частот. Последнее приводит к более быстрому затуханию сигнала и уменьшению глубинности исследовани .The known method of seismic signal excitation in water when operating in shallow water with the production of both single and group sources. However, when operating in shallow water, when the source’s immersion depth is limited, the duration of the compression phase of the signal is reduced due to the wave reflected from the water surface. This reduces the energy of the signal, and the maximum of the first lobe of the amplitude spectrum, determined by the delay time of the waves reflected from the water surface, shifts to high frequencies. The latter leads to a faster attenuation of the signal and a decrease in the depth of the study.
Наиболее близким по технической сущности к изобретению вл етс способ возбуждени сейсмического сигнала Б воде с помощью группы источников 2 .The closest in technical essence to the invention is a method of exciting a seismic signal from water using a group of sources 2.
Дл обеспечени .формировани сейсмического сигнала с равномерной спектральной плотностью в широкомTo provide a seismic signal with a uniform spectral density in a wide
диапазоне частот необходимо распол -. гать источники группы на разных глубинах , а это невозможно сделать на мелководье.frequency range needs to be placed. group sources at different depths, and this cannot be done in shallow water.
Целью насто щего изобретени вл етс увеличение глубинности исследовани на мелководье путем сосредоточени энергии сигнала в сейсмическом диапазоне частот.The purpose of the present invention is to increase the depth of exploration in shallow water by concentrating the signal energy in the seismic frequency range.
10ten
Поставленна цель достигаетс тем, что срабатывание каждого последующего источника в группе источников осуществл ют с задержкой, равной времени двойного пробега волны от источника до границы вода-воздух (дневной поверхности).This goal is achieved by the fact that the operation of each subsequent source in the group of sources is carried out with a delay equal to the double run time of the wave from the source to the water-air boundary (day surface).
На фиг. 1 приведена осциллограмма зажигани от источника-пневматической камеры объемом 2,5 л, погруженной на глубину 4 м; на фиг. 2 20 то же, от второй пневматической камеры , сработанной с задержкой 5,3 мс, на фиг. 3 - осциллограмма, полученна от двух источников т пневмати25 ческих камер, сработанных с задержкой , равной времени двойного пробега волны, от источника до границы водывоздух .FIG. 1 shows an oscillogram of ignition from a 2.5-liter source-pneumatic chamber, immersed to a depth of 4 m; in fig. 2 20 the same, from the second pneumatic chamber, actuated with a delay of 5.3 ms, in FIG. 3 is an oscillogram obtained from two sources and pneumatic chambers, triggered with a delay equal to the double-run time of the wave, from the source to the air-to-air boundary.
В соответствии с предложенным спо30 собом осуществл етс следующа посIn accordance with the proposed method, the following procedure is carried out
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792713876A SU792187A1 (en) | 1979-01-16 | 1979-01-16 | Method of exciting seismic signals in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792713876A SU792187A1 (en) | 1979-01-16 | 1979-01-16 | Method of exciting seismic signals in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU792187A1 true SU792187A1 (en) | 1980-12-30 |
Family
ID=20805667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792713876A SU792187A1 (en) | 1979-01-16 | 1979-01-16 | Method of exciting seismic signals in water |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU792187A1 (en) |
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1979
- 1979-01-16 SU SU792713876A patent/SU792187A1/en active
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