中国海洋大学学报（自然科学版）2025，Vol.55Issue(10)：81-89,9.DOI:10.16441/j.cnki.hdxb.20240281
速度与密度模型离散网格不同的重震联合反演方法
Joint Gravity-Seismic Inversion Method with Different Velocity and Density Model Discrete Grids
摘要
Abstract
By simultaneously using seismic travel time and gravity anomaly data,joint inversion under structural similarity constraints can effectively reduce the non-uniqueness of inversion and improve its accuracy.The resolution of gravity anomaly inversion density model is often lower than the resolution of seismic travel time inversion velocity model,so it is more reasonable to use different size of velocity and density grids in the joint gravity-seismic inversion.The authors derive the cross-gradient calculation for-mula when velocity and density grid sizes are different,and implement the two-dimensional joint gravi-ty-seismic inversion.The new method considers the different resolutions of gravity and seismic data,and can avoid overfitting caused by noise in the observed gravity anomalies and excessively small density grids.The proposed two-dimensional joint inversion method is tested using both theoretical model data and real measurement data.The results show that the new method,by using larger density grids and smaller velocity grids for joint inversion,can obtain a more accurate subsurface velocity and density model compared to using seismic or gravity inversion alone.关键词
地震/重力/交叉梯度/联合反演Key words
seismic/gravity/cross-gradient/joint inversion分类
天文与地球科学引用本文复制引用
吕鲁元,张建中,黄忠来..速度与密度模型离散网格不同的重震联合反演方法[J].中国海洋大学学报（自然科学版）,2025,55(10):81-89,9.基金项目
国家自然科学基金项目(42174154)资助 Supported by the National Natural Science Foundation of China(42174154) （42174154）
