石油地质与工程2026，Vol.40Issue(5)：35-42,8.DOI:10.26976/j.cnki.sydz.202605006
辽河坳陷表层季节性冻土对地震资料品质的影响研究
Study on the influence of seasonal permafrost in the shallow surface of the Liaohe Depression on seismic data quality
刘康 1韩继伟 2任丽莹 2赵超峰 2张群英 2邹启伟 1杨恺 2徐振旺1
作者信息
- 1. 中国石油辽河油田分公司,辽宁 盘锦 124010
- 2. 中国石油集团东方地球物理勘探有限责任公司辽河物探分公司,辽宁 盘锦 124010
- 折叠
摘要
Abstract
The Liaohe Depression,located in northeastern China,is an important part of the Bohai Bay Basin.Due to its dense surface drainage system and high soil moisture content,a high-velocity seasonal permafrost layer easily forms during winter,significantly altering seismic wave propagation characteristics.To analyze the impact of the frozen layer on seismic data quality,this study integrates micro-logging surveys,2D elastic wave forward modeling,and field data comparison to investigate the energy transmission behavior under varying frozen-layer thicknesses and velocities.Multiple 2D geological models were established,and Ricker wavelets of different dominant frequencies were used for simulation.The results show that as the frozen layer becomes thicker and faster,and the velocity contrast with the underlying low-velocity layer increases,seismic energy transmission is more strongly attenuated,shallow multiple interference intensifies,and the effective reflection bandwidth narrows,whereas low-frequency signals exhibit stronger penetration capability.Field data from the Liaohe Depression indicate that light freezing(approximately 0.5 m thick)improves source coupling and enhances first-arrival energy,while complete freezing reduces transmission efficiency.The study suggests that seismic acquisition should be conducted during the early freezing stage and employ low-frequency wavelets to improve energy transmission and reflection imaging quality,providing technical guidance for high-resolution seismic exploration under complex near-surface conditions.关键词
辽河坳陷/冻土层/地震波传播/弹性波正演/地震资料品质Key words
Liaohe Depression/permafrost layer/seismic wave propagation/elastic wave forward modeling/seismic data quality分类
天文与地球科学引用本文复制引用
刘康,韩继伟,任丽莹,赵超峰,张群英,邹启伟,杨恺,徐振旺..辽河坳陷表层季节性冻土对地震资料品质的影响研究[J].石油地质与工程,2026,40(5):35-42,8.
