【摘 要】
：
Air gun arrays are often used in marine energy exploration and marine geological surveys.The study of the single bub-ble dynamics and multibubbles produced by air guns interacting with each other is helpful in understanding pressure signals.We used the va
【机 构】
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Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,College of
【出 处】
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中国海洋大学学报（自然科学英文版）
论文部分内容阅读
Air gun arrays are often used in marine energy exploration and marine geological surveys.The study of the single bub-ble dynamics and multibubbles produced by air guns interacting with each other is helpful in understanding pressure signals.We used the van der Waals air gun model to simulate the wavelets of a sleeve gun of various offsets and arrival angles.Several factors were taken into account,such as heat transfer,the thermodynamically open quasi-static system,the vertical rise of the bubble,and air gun post throttling.Marine vertical cables are located on the seafloor,but hydrophones are located in seawater and are far away from the air gun array vertically.This situation conforms to the acquisition conditions of the air gun far-field wavelet and thus avoids the problems of ship noise,ocean surges,and coupling.High-quality 3D wavelet data of air gun arrays were collected during a vertical cable test in the South China Sea in 2017.We proposed an evaluation method of multidimensional facial features,including zero-peak amplitude,peak-peak amplitude,bubble period,primary-to-bubble ratio,frequency spectrum,instantaneous amplitude,instan-taneous phase,and instantaneous frequency,to characterize the 3D air gun wave field.The match between the facial features in the field and simulated data provides confidence for the use of the van der Waals air gun model to predict air gun wavelet and facial features to evaluate air gun array.
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