火成岩发育区的地震处理技术及需求分析——以胜利油田济阳拗陷探区为例

许多火成岩发育区孕育着丰富的油气资源。由于火成岩发育区具有独特的地质特征,地震波场复杂,制约了油气勘探的进程。本文针对胜利油田火成岩区地震资料的能量、频率及速度等特征,通过正演模型模拟了火成岩发育区地震波场的频散以及低通滤波效应等特性,阐述了针对火成岩发育区地震资料的面波处理、能量补偿、优势频带加权、速度分析及叠前时间与深度偏移联合成像等技术,并展示了这些技术在胜利油田三个火成岩区应用效果。最后根据胜利油田火成岩区不断深化勘探开发的需求,提出了今后-段时期内需要深入研究的方法与技术。

Processing technology of seismic data acquired in igneous rock area: Examples of Jiyang Depression in Shengli Oilfield

Many igneous rock areas are rich in oil gas resources.The special geological features and complex seismic wave field restrict the proceeding of exploration.This paper proposes a few processing approaches for this kind of data.By analyzing the igneous data characteristics in energy,frequency and velocity of Jiyang Depression in Shengli Oilfield,we simulate wave field frequency dispersion and low-pass filtering and other features,and illustrate igneous area-oriented seismic data surface wave processing,energy compensation,dominant frequency band weighting,velocity analysis and prestack time depth migration joint imaging technology.We demonstrate also our approach application results in Shengli Oilfield.We recognize that some processing methods for this kind of data merit further development in the subsequent exploration.