粘弹性波动方程聚焦成像技术在塔里木盆地的应用

来源期刊：中南大学学报(自然科学版)1999年第2期

论文作者：张建贵 张荣峰 宋守根 袁修贵

文章页码：4 - 7

关键词：粘弹性介质;小波分析;聚焦成像;沉积相;塔里木盆地

Key words：viscoelastic medium; wavelet analyse; variable focus maging; depositional phase; Tarim Basin

摘    要：由于塔里木盆地地表低速层覆盖厚，用 常规的地震处理技术难以得到高品质的地震剖面．用以大地介质为粘弹性介质作前提，结合小波分析理论的地震波波动方程聚焦成像技术在塔北某区进行了2-D地震资料的目标处理，得到了一套高分辨率、高信噪比和高保真的地震处理剖面．新剖面的品质较常规处理的剖面有明显改善．根据新剖面的地质解释得到了该区储油层———东河砂岩的分布规律，并据此首次从地震地层学角度提出了该储层的陆相沉积相问题．

Abstract: The quality of seismic cross-section which is processed by the conventional method due to thick desert thickness in Tarim is poor. In this paper, supposing that the earth medium is viscoelastic and based on wavelet transform, the technique of viscoelatic wave equation′s variable focus imaging (TVFI) has been used to process a block′s 2-D seismic data in Northern Tarim, so we have a suit of 2-D seismic cross-section with high resolution power and high signal-noise ratio and high procession. Compared with what has been done by the conventional method ,the quality of seismic cross-section processed by TVFI has been improved greatly. Based on whole geological explaining of the newly-processed cross-section, we have definited the layout of the oil bearing strata, Donghe sandstone. Therefore, for the first time the problem that the depositional phase of the oil bearing strata has been researched into from the view of seismic stratigraphy.