海洋地质前沿2026，Vol.42Issue(1)：95-106,12.DOI:10.16028/j.1009-2722.2025.019
海上深层低渗气田精细地震成像处理关键技术及应用
Key technologies and applications of fine seismic imaging processing for deep sea low-permeability gas fields
摘要
Abstract
The A gas field lies in the Xihu Sag of East China Sea Basin,with water depths of 90-110 m.Its main gas layers are buried over 4 000 m below sea level.Current prestack depth migration(PSDM)seismic data struggles to detect small faults,map detailed reservoir features,and predict drilling depths accurately.Repro-cessing the seismic data is critical to improve image quality and support gas field development.Based on raw seis-mic data,the reprocessing workflow prioritized noise suppression in marine environments,source-receiver ghost wave attenuation,and shallow-water multiple wave suppression.Key steps of seismic signal processing included high-precision velocity analysis,curved-ray Kirchhoff prestack time migration,globally optimized grid tomo-graphy velocity inversion,well-seismic joint anisotropic velocity modeling,and Kirchhoff anisotropic prestack depth migration.The reprocessed data shows clearer images with less background noise,better-defined faults,and more accurate reservoir details in deep zones and drilling depth predictions.This workflow can effectively en-hance seismic data for deep and low-permeability gas fields,and thus can be adapted to similar offshore projects.关键词
东海盆地/地震成像/鬼波/层析速度反演/各向异性/叠前深度偏移Key words
East China Sea Basin/seismic imaging/ghost waves/tomographic velocity inversion/anisotropy/pre stack depth migration分类
海洋科学引用本文复制引用
涂齐催,娄敏,李炳颖,刘江,毛云新,潘雅婷,吴啸啸,张宇慧..海上深层低渗气田精细地震成像处理关键技术及应用[J].海洋地质前沿,2026,42(1):95-106,12.基金项目
中海石油(中国)有限公司重大科技项目"东海低渗大气田高效开发关键技术研究与示范应用"(KJZX-2024-0102) （中国）
