石油地球物理勘探2025，Vol.60Issue(2)：341-352,12.DOI:10.13810/j.cnki.issn.1000-7210.20240056
频率域非白噪反射系数条件下的统计性反褶积技术
Statistic deconvolution technology under non-white-noise reflection coefficient condition in frequency domain:Taking the target processing of seismic interference effect elimination in Bohai M oilfield as an example
摘要
Abstract
The interbedding structure of Bohai M oilfield is well-developed.Due to the interference of the over-lying reservoir and the limitation of seismic data resolution,the seismic response of the underlying sand body with"one valley and one peak"becomes a single wave peak,making it impossible to characterize the underlying sand body through-90° phase shift data.Forward simulation shows that improving the resolution of seismic data is an effective means to eliminate the interference effect and restore the true seismic response of the reser-voir.It is found that the M oilfield reflection coefficient is non-white-noise in the effective frequency band of seismic data,which means the traditional statistic deconvolution technology under the assumption of white-noise reflection coefficient is not suitable for high-resolution processing of the seismic data in the M oilfield.To solve this problem,this paper proposes a high-resolution processing technology in frequency domain that can adapt to the non-white-noise reflection coefficient.This technology utilizes the overall trend of the amplitude spectrum of the reflection coefficient to constrain the energy of different frequency components during the frequency band expansion process of seismic data,achieving the goal of aligning the overall trend of the seismic amplitude spec-trum and the reflection coefficient amplitude spectrum after frequency band expansion.In addition,systematic analysis is conducted on the reasons why white-noise statistic deconvolution restricts the resolution improve-ment of seismic data under the non-white-noise reflection coefficient condition.After processing with the pro-posed technology,the seismic data resolution of the M oilfield has been significantly improved,comparable to the synthetic record of Ricker wavelet with the dominant frequency of 58 Hz,the interference effect between ad-jacent reservoirs is effectively eliminated.This technology can provide reliable high-resolution seismic data for the fine characterization of the reservoir.关键词
非白噪反射系数/统计性反褶积/高分辨率处理/地震子波/干涉效应消除Key words
non-white-noise reflection coefficient/statistic deconvolution/high resolution processing/seismic wavelet/interference effect elimination分类
天文与地球科学引用本文复制引用
明君,周建科,张德龙..频率域非白噪反射系数条件下的统计性反褶积技术[J].石油地球物理勘探,2025,60(2):341-352,12.基金项目
本项研究受中海石油(中国)有限公司综合科研项目"渤海中南部新近系规模型岩性油气藏成藏条件与勘探方向"(KJZH-2024-2102)资助. （中国）
