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| 气枪震源水中能量辐射特性研究 |
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董明荣1,2,3, 符力耘1,2,4, 邢超5, 杨军6, 李孝宾6
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1.中国科学院地质与地球物理研究所中国科学院地球与行星物理院重点实验室, 北京市北土城西路19号 100029;2.中国科学院地球科学研究院, 北京市北土城西路19号 100029;3.楚雄州地震局, 云南省楚雄市威楚大道196号 675000;4.中国石油大学(华东)地球科学与技术学院, 山东青岛 266580;5.中国船舶重工集团公司七五○实验场, 昆明 650051;6.中国地震局滇西地震预报实验场, 云南大理 671000
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| 摘要: |
| 基于云南宾川气枪主动源激发实验数据，对气枪震源水中能量辐射特性进行了分析研究，得到了气枪震源水中激发脉动气泡周期和最大半径的经验计算公式。结果表明：①气枪震源的能量辐射效率在垂直向下方向要高于水平方向；②垂直向下的气泡能辐射效率随着供气压力的增加而增大；③供气压力为15MPa时，气枪震源垂直向下的能量辐射效率为9.4%；④供气压力越大，气枪震源压力波叠加增强的持续距离越远。 |
| 关键词: 气枪震源 冲击波 气泡 能量 辐射 |
| DOI： |
| 分类号:P315 |
| 基金项目:中国地震局地震科技星火计划项目（XH17031SX）、云南省陈颙院士工作站（2014IC007）共同资助 |
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| Research on the Underwater Energy Radiation Characteristics of the Airgun Seismic Source |
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Dong Mingrong1,2,3, Fu Liyun1,2,4, Xing Chao5, Yang Jun6, Li Xiaobin6
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1.Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysic, Chinese Academy of Sciences, Beijing 100029, China;2.Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China;3.Earthquake Agency of Chuxiong Prefecture, Chuxiong 675000, Yunnan, China;4.China University of Petroleum(East China), School of Geosciences, Qingdao 266580, Shandong, China;5.750 Test Range, China Shipbuilding Industry Corporation, Kunming 650051, China;6.Western Yunnan Earthquake Prediction Study Area, CEA, Dali 671000, Yunnan, China
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| Abstract: |
| The underwater energy radiation characteristics of the airgun seismic source is studied based on the underwater wavelet data collected in the airgun excitation experiments in Binchuan,Yunnan. The empirical formula for calculating the bubble pulsation period and the maximum radius of the underwater airgun seismic source is obtained. The results show that:① The energy radiation efficiency is higher vertically than horizontally. ② The vertical bubble energy radiation efficiency increases with the increase of the gas supply pressure. ③ The vertical energy radiation efficiency of the airgun seismic source is 9.4%when the gas supply pressure is 15MPa. ④ The higher of the gas supply pressure,the farther of the constant distance for the overlay enhanced of the pressure wave of the airgun seismic source. |
| Key words: Airgun seismic source Shock wave Bubble Energy Radiation |
