物探与化探2025，Vol.49Issue(4)：838-845,8.DOI:10.11720/wtyht.2025.1451
构造导向的深度偏移井震误差校正方法
Structure-oriented log-seismic error correction in prestack depth migration
摘要
Abstract
Log-seismic error correction serves as a primary method for determining Thomsen's compressional-wave anisotropic parame-ters of vertical transverse isotropy(VTI)media.This method is also an essential processing technique for obtaining accurate depth-mi-grated images.Conventional log-seismic error correction involves determining the log-seismic errors at well locations and then directly applying planar interpolation to correct the depths of seismic horizons.However,the conventional method can lead to structural distor-tions and anomalous values of anisotropic parameter δ in areas with significantly varying formation thicknesses.To address this issue,re-searchers typically manually edit and smooth the anisotropic parameter field and the anisotropic velocity field,consuming considerable manpower and time.Hence,this study proposed a structure-oriented log-seismic error correction method that incorporates the concept of log-seismic error coefficient.The proposed method utilizes formation thicknesses as constraints to perform planar interpolation for log-seismic errors.Moreover,it employs a strategy of sequential calculation and interpolation for log-seismic errors from shallow to deep for-mations.It yielded log-seismic error distribution values that better conform to formation thickness variations and more stable δ values,without anomalous values.Therefore,the proposed method effectively avoids structural distortions induced by log-seismic error correction while saving manpower and time in practical projects.关键词
叠前深度偏移/井震误差校正/各向异性参数δ/构造导向Key words
prestack depth migration/log-seismic error correction/anisotropy parameter δ/structure-oriented分类
天文与地球科学引用本文复制引用
王丙钢,丁成震,张丹,董庆宇,陈鑫,王泽,杨阳,宣瑞卿..构造导向的深度偏移井震误差校正方法[J].物探与化探,2025,49(4):838-845,8.基金项目
中国石油天然气股份有限公司重大科技专项(2021-DJ-34-01) （2021-DJ-34-01）
