改善周口坳陷深部地震资料处理效果研究

Improvement of Deep Seismic Data Processing in Zhouk-ou Depression

周口坳陷勘探目的层较深、构造复杂 ,针对该区地震资料反射频率较低 ,深层信噪比低 ,断面波发育的特点 ,在大量的分析、试验基础上 ,确定了一套以提高信噪比 ,改善偏移成像精度为主要目标的地震资料处理流程 ,应用该处理流程 ,有效地提高了下第三系、白垩系及石炭二叠系主要勘探目的层的信噪比和偏移成像的精度。处理后的剖面上 ,主要目的层信噪比高 ,反射连续性好 ,反射波组特征清楚 ,断层清楚 ,构造形态可靠 ,易于对比追踪解释。

Exploration targets are deep and structures are complex in Zhoukou depressioa For the low reflectance, low signal- noise ratio and existence of fault plane waves, a seismic processing scheme, which takes improving signal - noise ratio and increasing accuracy of migration imaging, is proposed based on large quantity of analysis and experiments. Its application has effectively improved the signal - noise ratio and increased the accuracy of migration imaging of the key targets such as the Lower Tertiary, Cretaceous, Permian and Carboniferous. On the processed profile, the main targets have high signaln-oise ratio, good reflectance continuity, clear reflectance wave group features, clear faults and reliable structural shapes, thus structural interpretation is easier.