摘要
采用短时窗离散傅立叶变换及最大熵方法这一独特的频谱分解及解释技术——分频解释技术 ,实现了在频率域内通过调谐振幅的对应关系来研究储层横向变化规律 ,使地震解释可得到高于常规地震主频率对应 1/ 4波长的时间分辨率结果。分频解释技术的应用解决了长期困扰解释人员只能依靠钻井数据划分和确定岩性油藏边界的难题。目前 。
Seismic resolution is a key parameter to seismic data interpretation. Improving the seismic resolution is one of the most challenging tasks for the geologist & geophysicist in predicting thin bed and characterizing reservoir. The spectra decomposition, a new technology with shot windows Discrete Fourier Transform and Maximum Entropy Method, generates a thin bed spectra interference pattern in frequency domain which is imposed by the distribution of acoustic properties within the short analysis window. This technology can improve prospect definition beyond the conventional λ/4 thickness resolution determined from the wavelength of the dominant frequency of the seismic data,and it can help resolve what cannot be resolved in the time domain. In this study, the technology resolves a problem of predicting the boundary of reservoir which was determined by well data only in the past.So far, this solution has played an important role in oil and gas exploration in terrigenous depositional environment.
出处
《矿物岩石》
CAS
CSCD
北大核心
2003年第3期104-108,共5页
Mineralogy and Petrology
关键词
油藏描述
分频解释技术
短时窗离散傅立叶变换
最大熵方法
地震分辨率
1/4波长
spectra decomposition
short window discrete Fourier transform
maximum entropy method
reservoir description
1/4 wavelength
seismic resolution
