大庆石油地质与开发2025，Vol.44Issue(5)：36-44,9.DOI:10.19597/J.ISSN.1000-3754.202504063
面向油气开发的保幅道集生成方法及其应用
Amplitude-preserved gather generation method and application for oil and gas development
摘要
Abstract
Due to limitations in actual seismic acquisition conditions,formation absorption and attenuation,migra-tion algorithms and computation amounts,migrated imaging gathers often suffer from low resolution and inaccurate amplitude relationships.A method is proposed with least-squares illumination compensation in image domain.Effi-cient computational method is established by"diagonal"approximation to Hessian matrix,significantly reduce stor-age and computation amounts.Meanwhile,illumination wavelets are incorporated to more accurately account for mi-gration stacking process,directly generating pre-stack amplitude-preserved angle gathers and achieving true-ampli-tude imaging.This new method not only considers the influence of actual seismic wave propagation paths on ampli-tude values,but also mitigates the enormous computational and storage challenges in imaging process,enabling effi-cient output,with high signal-to-noise ratio angle gathers and seismic imaging obtained.Application shows that the new method can effectively improve amplitude variation with offset(AVO)of pre-stack gathers,with AVO character-istics of target layer gathers highly coincident with forward gathers.Compared to the previous achievement,a verage bandwidth enhancement of high fidelity gathers exceeds 10 Hz,and well-seismic correlation coefficient increases from 72％to 78％.The research provides high-fidelity data support for pre-stack inversion and reservoir prediction.关键词
海森矩阵/对角化/最小二乘/照明补偿/角道集Key words
Hessian matrix/diagonal/least-squares/illumination compensation/angle gather分类
天文与地球科学引用本文复制引用
赵忠华,王成,初海红,张芝铭,晏丰,刘浩宇..面向油气开发的保幅道集生成方法及其应用[J].大庆石油地质与开发,2025,44(5):36-44,9.基金项目
中国石油天然气股份有限公司重大科技专项"陆相页岩油规模增储上产与勘探开发技术研究"(2023ZZ15) （2023ZZ15）
中国石油天然气股份有限公司重大科技专项"古龙页岩油成藏理论与关键技术研究"(2021ZZ10-014). （2021ZZ10-014）
