摘要
为了研究气枪震源在深部构造地震勘探中的应用,通过大功率气枪震源在长江航道进行激发、江岸及外围陆地进行接收的二维非纵地震测线方式采集原始地震资料.受水体流动、深度范围、江河形状以及枪阵尺寸等因素的影响,野外采集的地震资料信噪比较低.为了提高深层反射地震的成像质量,针对研究区的构造特征以及资料采集特点选择最大覆盖次数连线剖面进行成像处理.成像结果表明,大容量气枪震源激发的地震资料能够反映研究区地壳结构特征,获得了较清晰的莫霍面反射图像,说明气枪震源可用于陆上流动水体的深层地震反射勘探.
In order to study the application of airgun seismic sources in deep structural seismic exploration,the original seismic data were collected by two-dimensional non-longitudinal seismic survey line which was excited by high-power airgun seismic sources in the Yangtze River channel and received by river bank and surrounding land.The signal-to-noise ratio of field seismic data is low because it is affected by factors such as water flow,depth range,river shape,and gun array size.For the sake of improving the imaging quality of deep reflection seismic,the maximum coverage connection profile is selected for imaging processing according to the structural characteristics and data acquisition characteristics of the study area.The imaging results show that the seismic data excited by the large-capacity airgun source can reflect the characteristics of the crustal structure in the study area and obtain clearer Moho reflection images,indicating that the airgun source can be used for deep seismic reflection exploration in landflowing water.
作者
杨飞龙
姚凤鸣
任广莹
霍亮
俞岱
YANG FeiLong;YAO FengMing;REN GuangYing;HUO Liang;YU Dai(College of the Geoscience and Engineering,Xi'an Shiyou University,Xi'an 710065,China;Academician and Expert workstation,Xi'an Shiyou University,Xi'an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an 710065,China;College of the Geological Engineering and Geomatics,Chang'an University,Xi'an 710065,China)
出处
《地球物理学进展》
CSCD
北大核心
2023年第1期348-360,共13页
Progress in Geophysics
基金
陕西省自然科学基金“基于自适应反射点加密的三维井间地震逆高斯束叠加成像”(2021JQ-588)
华能煤业有限公司自立科技项目“地震多属性融合技术对宁正矿区煤系盖层水灾害的预测应用研究”(HNMYKJ20-14)联合资助。
关键词
气枪震源
深层反射地震
非纵地震测线
地壳结构
成像
Airgun seismic sources
Deep reflection seismic
Non-longitudinal seismic survey line
The crustal structure
Imaging
