立体气枪阵列延迟激发震源特性及在浅海区OBS探测中的应用
发布时间：2019-06-08 07:28
【摘要】：利用中、小容量气枪组成的立体气枪阵列延迟激发震源和海底地震仪(OBS)在我国北部浅海海域开展了人工地震深部地球物理探测试验.基于水深条件和压制水体虚反射、提升低频能量的需要,使气枪震源有足够的输出能量和高品质子波特性,研究了立体气枪阵列延迟激发震源工作机理,经远场子波理论模拟优选了组合参数并进行了海上试验工作.结果表明,中、小容量气枪组成的立体气枪阵列延迟激发震源,适应了浅水海域的激发环境,降低了由虚反射造成的局部陷波和干扰作用,有效地改善了OBS信号的品质,获得了Ps,Pg,PmP,Pn等多种震相.创新了由中、小容量气枪组成的立体气枪阵列延迟激发震源在浅海区OBS探测中的应用,也填补了南黄海海域深地震探测数据的空白,为南黄海、渤海深部地壳结构研究及含油气盆地形成演化研究提供了重要的基础资料.
[Abstract]:The deep geophysical exploration experiment of artificial earthquake was carried out in the shallow sea area of northern China by using the delayed excitation source of the stereoscopic air gun array composed of medium and small capacity air gun and the seafloor Seismograph (OBS). Based on the water depth condition and the need to suppress the virtual reflection of water body and improve the low frequency energy, the air gun source has enough output energy and high quality wavelet characteristics, and the working mechanism of delayed excitation source by stereoscopic air gun array is studied. The combination parameters are optimized by far field wavelet theory simulation and the offshore test is carried out. The results show that the delayed excitation source of the stereoscopic air gun array composed of medium and small capacity air guns adapts to the excitation environment in shallow water, reduces the local notch and interference caused by virtual reflection, and effectively improves the quality of OBS signal. A variety of seismic phases, such as Ps,Pg,PmP,Pn, have been obtained. The application of delayed excitation source of stereoscopic air gun array composed of medium and small capacity air gun in OBS detection in shallow sea area has been innovated, and the blank of deep seismic detection data in South Huang Hai sea area has also been filled, which is the South Yellow Sea. The study of deep crustal structure and the formation and evolution of petroliferous basins in Bohai Sea provides important basic data.
【作者单位】： 国土资源部海洋油气资源与环境地质重点实验室;青岛海洋地质研究所;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;中国科学院地质与地球物理研究所;上海海洋石油局第一海洋地质调查大队;国家海洋局第一海洋研究所;中国海洋大学;
【基金】：国家自然科学基金项目(41210005,90814011) 国家“863”计划项目(2009AA093401) 国土资源部地质调查专项(GZH200800503,GZH201200509)联合资助
【分类号】：P631.4
本文编号：2495110
[Abstract]:The deep geophysical exploration experiment of artificial earthquake was carried out in the shallow sea area of northern China by using the delayed excitation source of the stereoscopic air gun array composed of medium and small capacity air gun and the seafloor Seismograph (OBS). Based on the water depth condition and the need to suppress the virtual reflection of water body and improve the low frequency energy, the air gun source has enough output energy and high quality wavelet characteristics, and the working mechanism of delayed excitation source by stereoscopic air gun array is studied. The combination parameters are optimized by far field wavelet theory simulation and the offshore test is carried out. The results show that the delayed excitation source of the stereoscopic air gun array composed of medium and small capacity air guns adapts to the excitation environment in shallow water, reduces the local notch and interference caused by virtual reflection, and effectively improves the quality of OBS signal. A variety of seismic phases, such as Ps,Pg,PmP,Pn, have been obtained. The application of delayed excitation source of stereoscopic air gun array composed of medium and small capacity air gun in OBS detection in shallow sea area has been innovated, and the blank of deep seismic detection data in South Huang Hai sea area has also been filled, which is the South Yellow Sea. The study of deep crustal structure and the formation and evolution of petroliferous basins in Bohai Sea provides important basic data.
【作者单位】： 国土资源部海洋油气资源与环境地质重点实验室;青岛海洋地质研究所;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;中国科学院地质与地球物理研究所;上海海洋石油局第一海洋地质调查大队;国家海洋局第一海洋研究所;中国海洋大学;
【基金】：国家自然科学基金项目(41210005,90814011) 国家“863”计划项目(2009AA093401) 国土资源部地质调查专项(GZH200800503,GZH201200509)联合资助
【分类号】：P631.4
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