石油地球物理勘探2025，Vol.60Issue(5)：1134-1145,12.DOI:10.13810/j.cnki.issn.1000-7210.20240262
一种改进的Q值提取和反Q滤波方法及应用
An improved Q estimation and inverse Q-filtering method and its application
摘要
Abstract
Conventional post-stack seismic data are usually affected by absorption attenuation,resulting ina lower peak frequency,narrower frequency band,low resolution,and poor inversion prediction effect.There-fore,an improved Q estimation and inverse Q-filtering method is proposed to improve the resolution of seismic data and obtain the fidelity and amplitude-preserving seismic data.Firstly,in Q estimation,given the problem that the extracted wavelet amplitude spectrum deviates from the actual situation due to the thin-layer tuning e-ffect that affects the Q estimation accuracy,the complete ensemble empirical model decomposition with adaptive noise(CEEMDAN)method is introduced,which eliminates the interference of reflection coefficients by decom-posing and reconstructing the log amplitude spectrum and thus obtains the wavelet amplitude spectrum that re-moves the tuning effect.Combined with the centroid frequency shift of the energy spectrum,higher-accuracy Q values are obtained.Then,in terms of inverse Q filtering,the amplitude compensation function of the time-varying gain stabilization factor method is optimized to overcome the density dependence and obtain more stable inverse Q-filtering results.The actual data processing results show that the proposed method can obtain fidelity and amplitude-preserving high-resolution post-stack seismic data,which lays a reliable data foundation for sub-sequent exploration and development of the study area.关键词
高分辨/Q值提取/反Q滤波/经验模态分解/稳定因子法Key words
high resolution/Q estimation/inverse Q-filtering/empirical mode decomposition/stabilization factor method分类
天文与地球科学引用本文复制引用
史威龙,熊晓军,张本健,王朝,熊高君..一种改进的Q值提取和反Q滤波方法及应用[J].石油地球物理勘探,2025,60(5):1134-1145,12.基金项目
本项研究受国家科技重大专项"大型油气田及煤层气开发"子课题"基于地应力分析的页岩工程'甜点'预测分析技术"(2016ZX05023004-001-003)资助. （2016ZX05023004-001-003）
