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Research on Energy Radiation Characteristics of an Air-gun Source Excited in Land Reservoir
Dong Mingrong1, Fu Liyun2, Xing Chao3, Yang Jun4, Li Xiaobin4
1.Southwest Forestry University;2.Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysics, Chinese Academy of Sciences;3.750 Test Range, China Shipbuilding Industry Corporation;4.Western Yunnan Earthquake Prediction Study Area, China Earthquake Administration
摘要:
The energy radiation process of an air-gun seismic source in land reservoir is studied based on the underwater wavelet data collected in the air-gun excitation experiments in Binchuan, Yunnan, China. The empirical formula for calculating the bubble pulsation period and the maximum radius of the underwater air-gun seismic source is obtained. The results show that: ①The energy radiation efficiency is higher vertically than horizontally.②The vertical bubble energy radiation efficiency increases with the increase of the air supply pressure.③The vertical energy radiation efficiency of the air-gun seismic source is 9.4% when the air supply pressure is 15MPa. ④The higher the air supply pressure, the further the propagating distance of the superposition- enhanced pressure wave of an airgun source.
关键词:  Land Reservoir  Airgun seismic source  Shock wave  Bubble  Energy  Radiation Process
DOI:10.19743/j.cnki.0891-4176.201901002
分类号:
基金项目:Science for Earthquake Resilience (XH17031SX) of China Earthquake Administration, and Academician Chen Yong workstation in Yunnan Province (2014IC007).
Research on Energy Radiation Characteristics of an Air-gun Source Excited in Land Reservoir
Dong Mingrong1, Fu Liyun2, Xing Chao3, Yang Jun4, Li Xiaobin4
1.Southwest Forestry University;2.Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysics, Chinese Academy of Sciences;3.750 Test Range, China Shipbuilding Industry Corporation;4.Western Yunnan Earthquake Prediction Study Area, China Earthquake Administration
Abstract:
The energy radiation process of an air-gun seismic source in land reservoir is studied based on the underwater wavelet data collected in the air-gun excitation experiments in Binchuan, Yunnan, China. The empirical formula for calculating the bubble pulsation period and the maximum radius of the underwater air-gun seismic source is obtained. The results show that: ①The energy radiation efficiency is higher vertically than horizontally.②The vertical bubble energy radiation efficiency increases with the increase of the air supply pressure.③The vertical energy radiation efficiency of the air-gun seismic source is 9.4% when the air supply pressure is 15MPa. ④The higher the air supply pressure, the further the propagating distance of the superposition- enhanced pressure wave of an airgun source.
Key words:  Land Reservoir  Airgun seismic source  Shock wave  Bubble  Energy  Radiation Process