海米罗斯地区地震资料目标处理技术研究

The Application of Target-oriented Seismic Data Processing Technique to Haimi-luosi Area

在海米罗斯工区勘探中,地震地质条件极为复杂,主要表现为地表沙山起伏剧烈和地下大倾角推覆构造。由此导致地震记录信噪比低、各种干扰波发育和近地表静校正问题突出。由于浅层的强波阻抗界面屏蔽了下传能量,导致有效波较弱,对地震资料处理带来很大难度。针对该地区原始资料特点,重点改善奥陶系主要目标层的反射品质及构造带轴部中深层反射信噪比为目标,开展静校正技术、叠前多域去噪、叠前时间偏移等目标处理技术研究,有效提高了地震剖面成像质量。

In Haimi-luosi area exploration,the S/N ratio of seismic records are poor with various noises and severe surface static problems,for complex,seismic exploring conditions caused by complex surface and complicated thrust structures.Because the powerful surface wave impedance screens the downloading energy,the effective wave is becoming weaker,so it is very difficult for the seismic data processing.To the original data characteristics,the S/N ratio of target-oriented Ordovician and mid-depth structure and the target-oriented processing technique static correction problems are improved.Pre-stack multi-domain denoising and pre-stack time migration.were applied,which effectively raises the quality of the seismic section images.