科技创新与应用2024，Vol.14Issue(25)：178-180,184,4.DOI:10.19981/j.CN23-1581/G3.2024.25.044
高原冻土地表地震勘探技术及应用
王海立 1王永生 2李伟波 1武威威 1马立新 1何丽1
作者信息
- 1. 中国石油东方地球物理公司,河北 涿州 072750
- 2. 中国石油青海油田公司,甘肃 敦煌 736202
- 折叠
摘要
Abstract
The Qinghai-Tibet Plateau is one of the national energy strategic reserve areas,which is rich in oil and gas resources,but the surface permafrost is developed,the seismic wave field is complex,and oil and gas seismic exploration is faced with many challenges.In view of the surface characteristics of the permafrost on the Qinghai-Tibet Plateau,first,the techniques of"low frequency vibroseis excitation,high density wide line observation,long arrangement+small combination reception"are adopted to overcome the reflection energy shielding and noise interference of the middle and deep layers of the permafrost.Reduce the impact of seismic engineering operations on the environment.Second,low SNR first arrival processing technology,high-precision constrained tomography inversion technology and space-varying multi-domain first arrival residual statics technology are used to improve the accuracy of first arrival picking and tomographic inversion model,and solve the static correction problem caused by drastic changes in permafrost surface velocity.Thirdly,denoising technology based on effective reflection band of frozen soil layer,velocity picking technology based on AMT inversion constraint and fine cutting technology based on sub-offset superposition imaging are adopted to effectively remove the influence of frozen soil surface noise and guide velocity picking and fine cutting.The above-mentioned techniques have obtained high-quality seismic data and laid a solid foundation for seismic exploration of oil,gas and mineral resources.关键词
冻土/低频震源/静校正/地震成像/青藏高原Key words
permafrost/low frequency source/static correction/seismic imaging/Qinghai-Tibet Plateau分类
交通工程引用本文复制引用
王海立,王永生,李伟波,武威威,马立新,何丽..高原冻土地表地震勘探技术及应用[J].科技创新与应用,2024,14(25):178-180,184,4.
