Experiment and Simulation of Large Capacity Air-guns in Deep Structure Exploration  

作　　者：Tang Jie Wang Baoshan Ge Hongkui Chen Yong 

机构地区：[1]College of Geo-Resources and Information, China University of Petroleum, Qingdao 266555, China [2]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

出　　处：《Earthquake Research in China》2009年第4期I0001-I0001,373-382,共11页中国地震研究（英文版）

基　　金：sponsored by the National Natural Science Foundation of China (40730318 and 40574019);the key project of social welfare of the Ministry of Science and Technology,PRC(2005DIA3J117) ;seismic industry research project (200808002);basic scientific research of Institute of Geophysics CEA(DQJB07A01) ,China

摘　　要：The air-gun source has important applications as a new, environmentally, green active source in regional scale deep exploration. In the past, the air gun source was used mainly in smallscale, high-resolution shallow oil exploration, but has a lack of adequate research in deep exploration. In order to study the selection of work parameters and field conditions of the air gun source in deep exploration, this paper does the following work： （1） analyze the characteristics of the air gun source using air gun experiments; （2） simulate the air gun signal and air gun-array signal based on the theory of free bubble oscillation to analyze the influence of bubble oscillation and study the wavelet energy and spectrum characteristics needed in deep exploration; （3） on the basis of theoretical simulation, study the influence of work parameters, such as air-gun capacity, work stress and depth on air gun signal and analyze the influence of air-gun array inspired moment and spacing of different air guns on air gun-array signals; and （4） study energy reflection and transmission coefficients for different underwater interfaces, which is very useful for choosing suitable field conditions.The air-gun source has important applications as a new, environmentally, green active source in regional scale deep exploration. In the past, the air gun source was used mainly in small-scale, high-resolution shallow oil exploration, but has a lack of adequate research in deep exploration. In order to study the selection of work parameters and field conditions of the air gun source in deep exploration, this paper does the following work: ① analyze the characteristics of the air gun source using air gun experiments; ② simulate the air gun signal and air gun-array signal based on the theory of free bubble oscillation to analyze the influence of bubble oscillation and study the wavelet energy and spectrum characteristics needed in deep exploration; ③ on the basis of theoretical simulation, study the influence of work parameters, such as air-gun capacity, work stress and depth on air gun signal and analyze the influence of air-gun array inspired moment and spacing of different air guns on air gun-array signals; and ④ study energy reflection and transmission coefficients for different underwater interfaces, which is very useful for choosing suitable field conditions.

关 键 词：Air-gun Wavelet simulation Bubble effect Work parameter Field condition 

分 类 号：P631.43[天文地球—地质矿产勘探] TP274.2[天文地球—地质学]