物探与化探2026，Vol.50Issue(1)：137-144,8.DOI:10.11720/wtyht.2026.1355
基于叠后地震资料方位振幅变化率差异的裂缝预测技术
A fracture prediction technique based on differences in azimuthal amplitude variations in post-stack seismic data
摘要
Abstract
Fractures serve as important seepage channels and storage spaces for hydrocarbon reservoirs.Therefore,the precise predic-tion of their distribution characteristics(density and orientation)holds critical significance for hydrocarbon exploration and development.However,existing fracture prediction methods using post-stack seismic data(such as coherence and curvature)cannot effectively extract azimuthal differences,thus failing to meet the demand for high-precision fracture prediction.Given this,this paper proposed a fracture prediction method by performing ellipse fitting on azimuthal attribute differences of post-stack seismic data.Specifically,the original da-ta were optimized using structure-oriented filtering,from which three or more characteristic azimuth angles were further selected to ex-tract azimuthal attributes.Then,the extracted attributes were analyzed using ellipse fitting to quantify attribute anisotropy.Ultimately,the fracture density and orientation were inverted using ellipse parameters(the ellipticity and major/minor axis directions).The practical ap-plication of this method in an oil field demonstrates a high coincidence between the predicted fracture density and direction and the actu-al drilling data,achieving superior accuracy compared to conventional fracture prediction methods.This method provides a high-preci-sion fracture prediction solution for areas lacking wide-azimuth pre-stack seismic data.关键词
储层预测/裂缝/密度/方位属性/椭圆拟合Key words
reservoir prediction/fracture/density/azimuth attribute/ellipse fitting分类
天文与地球科学引用本文复制引用
周鹏..基于叠后地震资料方位振幅变化率差异的裂缝预测技术[J].物探与化探,2026,50(1):137-144,8.基金项目
新型油气勘探开发国家科技重大专项项目28课题五"深层超深层勘探地球物理关键技术"(2025ZD1402805) （2025ZD1402805）
