天然气工业2026，Vol.46Issue(5)：54-63,10.DOI:10.3787/j.issn.1000-0976.2026.05.005
塔里木盆地沙漠地区近地表衰减介质对深层-超深层缝洞储集体成像影响
Impact of near-surface attenuating media on seismic imaging of deep to ultra-deep fractured-vuggy reservoirs in the desert area of the Tarim Basin
摘要
Abstract
The loose structures and serious weathering and denudation of the near-surface layers in desert areas have a significant absorbing and attenuating effect on seismic wave,greatly reducing the imaging accuracy and identification reliability of deep to ultra-deep fractured-vuggy reservoirs in the Tarim Basin.Additionally,there is little research on the quantitative characterization of the comprehensive influence of this effect on reservoir imaging features.This paper carries out forward modeling of fractured-vuggy reservoirs under the condition of near-surface strong attenuation by means of the pseudo-spectral method based on the generalized viscoelastic wave equation,and then comparatively analyzes the reflection characteristics and imaging results of deep to ultra-deep fractured-vuggy reservoirs across varying near-surface attenuation intensities and thicknesses.The following results are obtained.First,under the condition of near-surface strong absorption and attenuation,two parallel reservoirs require a minimum separation of 1/2 wavelength,so that the seismic imaging can effectively tell the difference between different fractured-vuggy reservoirs.Second,under the condition of surface strong attenuation,low-velocity reservoirs exhibit higher resolution than high-velocity ones,and the reservoir combinations with different velocities will interfere each other,and thus reduce the seismic imaging resolution.Third,under the condition of surface strong absorption and attenuation,the displacement distance of reservoir imaging is proportional to the thickness of absorption and attenuation layer.Fourth,the near-surface absorption and attenuation effect can shift the correspondence between the"beadlike"imaging phase and the top and bottom interfaces of reservoir.In conclusion,this study further understands the impact of near-surface loose structures on seismic wave reflection characteristics and imaging accuracy of deep to ultra-deep fractured-vuggy reservoirs,and provides guidance and reference for understanding the imaging patterns of fractured-vuggy reservoirs.关键词
广义黏弹性波动方程/吸收衰减介质/正演模拟/深部储集体成像/沙漠地区近地表Key words
Generalized viscoelastic wave equation/Absorbing and attenuating medium/Forward modeling/Deep reservoir imaging/分类
能源科技引用本文复制引用
申哲宇,饶莹,赵振聪,张庆,丁晟..塔里木盆地沙漠地区近地表衰减介质对深层-超深层缝洞储集体成像影响[J].天然气工业,2026,46(5):54-63,10.基金项目
国家自然科学基金项目"基于机器学习的地震全波形反演方法研究"(编号:42430803)、"弹性波全波场成像反演基础理论与方法"(编号:U25D9025). （编号:42430803）
