石油地球物理勘探2023，Vol.58Issue(6)：1343-1348,6.DOI:10.13810/j.cnki.issn.1000-7210.2023.06.006
表层季节性冻土对地震资料品质的影响
The influence of seismic data quality by seasonal permafrost
摘要
Abstract
Due to the protection of surface vegetation in most farmland and grassland areas,seismic exploration can only be carried out in winter after the harvest of crops.People in northern China typically irrigate their farmland around mid-October each year,resulting in high water content in the soil and low winter temperatures.As the soil freezes on the surface,a set of high-speed permafrost layers form,adding complexity to near-surface structures.Vi-broseis excite signals at the surface,and seismic wave propagation in frozen soil will be affected by the resonance fre-quency of frozen soil medium,weakening the energy of low-frequency seismic wave signals.The Results indicate that after the permafrost layer is covered,the received low-frequency information weakers and the overall spectrum shifts towards high-frequency section.In view of the complex near-surface structure caused by seasonal frozen soil,the seismic wave propagation mechanism of frozen soil layer and the actual data analysis are carried out in this paper,which can provide a solution for improving the quality of vibroseis acquisition data in seasonal frozen soil area.关键词
冻土层/近地表/模型正演/资料品质/阻尼力/吸收衰减/共振频率Key words
permafrost/near-surface/modeling/data quality/damping force/absorption attenuation/resonance fre-quency分类
天文与地球科学引用本文复制引用
陈敬国,袁胜辉,唐传章,崔宏良,李景叶,邓志文..表层季节性冻土对地震资料品质的影响[J].石油地球物理勘探,2023,58(6):1343-1348,6.基金项目
本项研究受中国石油股份公司重大科技专项"河套盆地油气富集规律与勘探关键技术研究"(2021DJ0703)和中国石油集团东方地球物理公司科研项目"地震采集方法基础研究"(03-01-2022)联合资助. （2021DJ0703）
