石油地球物理勘探2025，Vol.60Issue(2)：中插2-中插3,383-390,10.DOI:10.13810/j.cnki.issn.1000-7210.20240284
基于粒子群的四边形网格优化方法
Quadrilateral mesh optimization method based on particle swarm
摘要
Abstract
As oil and gas exploration in China continues to advance and the geological conditions in exploration scenarios become increasingly complex,the need for applying the spectral element method as a seismic explora-tion technology in oil and gas exploration becomes more urgent.In forward modeling,the spectral element method imposes high demands on the quality of quadrilateral finite element meshes.Generating high-quality quadrilateral mesh models for complex geological structures is a critical technical challenge for the successful ap-plication of the spectral element method in seismic exploration.Optimize the processes of generating triangular meshes and merging triangles to generate quadrilateral meshes using Frontal-Delaunay algorithm and Blossom-Quad algorithm,respectively.However,for complex geological models,the generated initial quadrilateral meshes still suffer from issues such as topological errors and concave quadrilaterals.Therefore,it is necessary to study a quadratic optimization algorithm for further optimizing the initial quadrilateral network.This algo-rithm focuses on distorted nodes in the mesh,determining their solution space and optimizing loss function.Overall optimization of the quadrilateral mesh can be achievedby initializing a particle swarm in the solution space and iteratively adjusting the positions of the distorted nodes.Experiments with complex geological mo-dels indicate that the secondary optimization algorithm can completely eliminate topological errors present in the initial quadrilateral meshor degenerate quadrilaterals.Additionally,the optimized quadrilateral edges become more uniform,and the minimum edge length of the mesh is improved,which significantly enhances the effi-ciency of the forward modeling algorithm.This lays a solid foundation for the further application of the spectral element method in seismic exploration technology.关键词
地震勘探/四边形网格/谱元法/粒子群优化算法/正演模拟Key words
seismic exploration/quadrilateral mesh/spectral element method/particle swarm optimization algo-rithm/forward modeling分类
地质学引用本文复制引用
邓飞,杨少辉,吕盼盼,罗开云,彭文..基于粒子群的四边形网格优化方法[J].石油地球物理勘探,2025,60(2):中插2-中插3,383-390,10.基金项目
本项研究受中国石油天然气集团有限公司科技项目"多物理场高精度油气地球物理探测技术与装备"(2023ZZ05)之课题"地球物理井地立体探测方法与装备研发"资助. （2023ZZ05）
