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海上震源、电缆的长度和沉放深度以及排列的布置应根据分辨率和勘探深度来选择。高分辨率时,震源和等浮电缆的理论最佳沉放深度为1米左右(有效频率为150-600H_2),中分辨率为3-6米(50-200Hz),常规地震为12米(到50Hz)。在大陆架,进行高分辨率勘探时,等浮电缆的最佳长度为120米;中分辨率为600-1200米。当采用同步震源和非加权检波器排列时,对于高分辨率,组合震源和组合道长都不应超过4-6米;中分辨率不应超过12-36米。用“分辨率”号勘探船和Flexichoc FHC50挤压震源,得到的高、中分辨率的地震记录与理论值完全一致。
Seawater sources, cable lengths and sinking depths, and arrangements should be chosen based on resolution and exploration depth. At high resolution, the theoretical optimal depth of focus of the source and streamers is about 1 meter (effective frequency 150-600H 2), medium resolution 3-6 meters (50-200 Hz) and conventional earthquakes 12 meters To 50Hz). On continental shelves, the best length of the streamers for high-resolution exploration is 120 meters; the resolution is 600-1200 meters. When using both synchronous and non-weighted detector arrangements, the combined source and combined track length should not exceed 4-6 meters for high resolution; the median resolution should not exceed 12-36 meters. Seismic records of high and medium resolution obtained from the “Resolution” exploration vessel and the Flexichoc FHC50 pinch source coincide with the theoretical values.