摘要
低频伴影技术已在地震资料检测油气中得到应用，但其形成机理仍然没有令人信服的解释。以叠后地震资料为基础，从地震子波衰减及其在油气中的衰减规律的角度正演含油气储层，然后对正演的地震剖面运用高精度的小波变换时频分析方法提取单频剖面，高频剖面出现储层下方弱能量（即上强、下弱），低频剖面出现储层下方强能量（即上强、下强），与实际地震资料含油气岩层低频伴影现象一致。该模拟方法为揭示低频伴影现象的本质提供了全新的思路。
Low frequency adjoint-shadow technology has been applied in hydrocarbon detection by using seismic data, while there is yet no convincing explanation for its forming mechanism. On the basis of poststaek seismic data, hydrocarbon-bearing reservoirs are forwarded from the angle of seismic wavelet attenuation and its attenuation laws in oil and gas, and then for the forward seismic profile a single frequency profile is extracted by using wavelet transformation time frequency analysis method with high precision. The high frequency profile shows weak energy in the lower part of reservoir （ that is, strong in the upper part and weak in the lower part） , and the low frequency profile shows strong energy in the lower part of reservoir （ that is, strong in both upper and lower parts） , which is consistent with low frequency adjoint-shadow phenomenon in hydrocarbon-bearing reservoirs observed in the actual seismic data. The simulation method is a new clue for revealing the nature of low frequency adjoint-shadow phenomenon.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第1期157-160,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基余项目（40904035）资助.
关键词
子波衰减
正演
单频剖面
低频伴影
数值模拟
wavelet attenuation
forward
single frequency profile
low frequency adjoint-shadow
numerical
