火山岩发育地区三维地震资料处理技术

Processing technology of 3-D seismic data for igneous rock developed area

方法 针对辽河盆地东部凹陷黄金带、于楼、热河台 (简称黄、于、热 )等火山岩发育区地震资料处理中存在的问题及难点 ,采取全区振幅能量的调整 ;叠前提高信噪比和分辩率 ;速度分析 ;去多次波 ;谱白化 ;消除偏移画弧 ,完成复杂构造的一步法偏移等一系列技术措施 ,对该区原地震资料进行处理方法研究。目的 弄清辽河盆地东部凹陷中段火山岩发育区复杂构造带的形态 ,寻找油气藏。结果 用该处理技术对黄、于、热火山岩发育区 380km2 的三维连片资料进行处理 ,其结果较原处理剖面有明显改进 ,进一步搞清了桃园—黄金带、于楼、热河台等区的构造特征及中央构造带的小断裂情况 ,并从中发现了多个有利圈闭。结论 本文总结出的三维地震资料处理技术 ,流程完整、实用、合理 ;加强火山岩强反射层间的弱反射、衰减多次波、消除火山岩强反射层所致的偏移画弧干扰等措施是可行的。

Method To the existing problems and difficulties during processing seismic data from Huangjindai, Yulou, Rehetai and etc igneous rock developed area in east sag, Liaohe basin, a series of technical measures have been adopted to study processing methods upon previously obtained seismic data, including adjustment of amplitude energy of whole area, enhancement of pre stack signal to noise ratio and resolution, velocity analysis, elimination of multiple reflection and deflected arching, white noise, etc. Purpose\ To understand modes of complicated structural zones in igneous rock developed area of east sag, Liaohe basin, and to find out future hydrocarbon reserves. Result\ Processing continuous 3 D seismic data of 380 km\+2 with the presented method upon Huang/Yu/Re igneous rock developed area has produced an obviously better results compared with before processed results, and further understood structural characteristics and small faults in central structural zone of this area. Many favorable traps have been found in due process finally. Conclusion\ 3 D seismic data processing technique summarized in this paper has complete, practical and reasonable flow scheme; measures in strengthening weak reflectance between strong reflecting igneous rock formations, attenuating multiple reflection, eliminating disturbance such as deflected arching caused from strong reflectance igneous formations are also feasible.tingign