FWI速度建模技术在涠西探区的应用研究  

Application of FWI Velocity Modeling Technology in Weixi Area

作　　者：陈琳枝 赵秀莲[1] 邢雯淋 李亚清 李振伟 CHEN Linzhi;ZHAO Xiulia;XING Wenlin;LI Yaqing;LI Zhenwei(Institute of Exploration and Development,SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院,上海200120

出　　处：《海洋石油》2024年第4期15-18,24,共5页Offshore Oil

摘　　要：涠西探区发育复杂断裂,地震速度横向变化大,高精度速度模型对该区断块地震成像至关重要。采用层析速度建模的偏移数据成像仍难以满足精细勘探开发的需求。全波形反演(FWI)是目前工业界广泛应用的先进速度建模技术,利用透射波、折射波等全部的波形信息,有利于得到更精细的速度模型。针对涠西地区复杂构造,应用层析和透射波FWI联合迭代工作流程,建立了研究区高精度速度模型。最终的叠前深度偏移数据成像质量得到明显提升,为涠西探区精细勘探开发提供可靠的基础数据。Weixi exploration area develops complex faults,and the lateral variation of seismic velocity is large.High-precision velocity model is critical to the seismic imaging of fault blocks in this area.While the migration data imaging using tomographic velocity modeling is still difficult to meet the demand of fine exploration and development.Full waveform inversion(FWI) is an advanced velocity modeling technology which is widely used in industry at present.It utilizes the full waveform information such as transmitted wave and refracted wave,and it is beneficial to obtain a finer velocity model.Aiming at the complex structure in Weixi area,a high-precision velocity model in the study area was established by using the combined iterative workflow of tomography and transmitted wave FWI.The imaging quality of the final prestack depth migration data has been significantly improved,which provides reliable basic data for the fine exploration and development of Weixi exploration area.

关 键 词：涠西探区 复杂断块 速度建模技术 全波形反演 

分 类 号：P618.13[天文地球—矿床学]