基于零偏VSP初至的地震高频补偿与效果  

Seismic high-frequency compensation based on zero-offset VSP first break and its effect

作　　者：陈斌[1] CHEN bin(Exploration&Development Research Institute of Daqing Oilfield Ltd.Co.,Daqing 163712)

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《内蒙古石油化工》2022年第9期45-48,共4页Inner Mongolia Petrochemical Industry

摘　　要：依据基于零偏VSP数据的初至波主频率随深度下降的关系,应用主频偏移法逐点求得随深度变化的地层品质因子Q;按照坳陷盆地层状介质的特点,依据地震速度和主要反射界面将目的层上部坳陷期地层划分为多层常数Q模型,实现Q值场的时变和空变。在叠前、叠后地震数据体上,采用增益控制Q值高频补偿技术,提高地震资料的分辨率,与测井及VSP数据的匹配程度提高。In this paper,based on the relationship that the frequency of direct wave of zero-offset VSP data is decreased as the depth increasing,the earth quality factor Q in each depth is calculated by using the main frequency shift method.On the light of seismic velocity and major reflector,the strata have vertically been divided into multi layers and each of them has a consistent Q.Then the Q model of subsurface is build of time and space variation.We present a method for seismic data high frequency compensation on prestack and post-stack seismic data of Changjiaweizi 3D seismic survey,The results demonstrate that the seismic frequency band is extended more then 5Hz,the major reflectors are transversely toned up,the internal reflections among layers are boosted up and the seismic data is tied highly with well logging and VSP data.That provides benefits for reservoir evaluation of this area.

关 键 词：零偏VSP 品质因子Q 主频偏移法 高频补偿 

分 类 号：P631.4[天文地球—地质矿产勘探]