摘要
地层的吸收衰减作用是降低地震分辨率的一个主要因素,准确地提取地层的品质因子Q和进行稳定而有效的Q补偿是非常困难的。这里采用改进的谱比法技术系列从VSP下行波场资料中提取准确的Q值,利用井控约束建立三维Q场,最后使用稳定的反Q滤波对叠前地震数据进行处理,补偿后的地震剖面分辨率得到提高,地质现象更为清晰,取得了满意的效果。
The formation's absorption and attenuation is one major factor of seismic resolution decreasing.It is very difficult to extract the formation's quality factor Q accurately and do Q compensation stably and effectively.In this paper,firstly,series of modified spectral-comparison methods are used to extract accurate Q value from VSP downward wave field;secondly,well-controlled method is used to build 3D Q field;finally,stable inverse Q method is used to process pre-stack seismic data. After Q compensation,the resolution of seismic section is raised and different geological events become clear,which achieves satisfactory results.
出处
《物探化探计算技术》
CAS
CSCD
2015年第6期749-753,共5页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家科技重大专项(2011ZX05001-06)
中国石油天然气股份公司科技攻关项目(2013-04-01)
关键词
Q值提取
井控
Q补偿
VSP
Q-extraction
well-controlled
Q-compensation
VSP
