A joint absorbing boundary for the multiple-relaxation-time lattice Boltzmann method in seismic acoustic wavefield modeling

作     者：Chun-Tao Jiang Hui Zhou Mu-Ming Xia Han-Ming Chen Jin-Xuan Tang 

作者机构：State Key Laboratory of Petroleum Resources and ProspectingCNPC Key Lab of Geophysical ExplorationChina University of PetroleumBeijing102249China CAS Engineering Laboratory for Deep Resources Equipment and TechnologyInstitute of Geology and Geophysicsand Innovation Academy for Earth ScienceChinese Academy of SciencesBeijing100029China Research Institute of Petroleum Exploration&DevelopmentPetroChinaBeijing100083China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2023年第20卷第4期

页      面：2113-2126页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：This work is supported in part by the National Natural Science Foundation of China(U19B6003-04-01,42204132,41874130) R&D Department of CNPC(2022DQ0604-01) China Postdoctoral Science Foundation(2020M680667,2021T140661) 

主　　题：Multiple-relaxation-time Lattice Boltzmann method Seismic acoustic wavefield simulation Truncated Boundary reflection Joint absorbing boundary 

摘      要：Conventional seismic wave forward simulation generally uses mathematical means to solve the macroscopic wave equation,and then obtains the corresponding seismic ***,when the subsurface structure is finely constructed and the continuity of media is poor,this strategy is difficult to meet the requirements of accurate wavefield *** paper uses the multiple-relaxation-time lattice Boltzmann method(MRT-LBM)to conduct the seismic acoustic wavefield simulation and verify its computational *** cope with the problem of severe reflections at the truncated boundaries,we analogize the viscous absorbing boundary and perfectly matched layer(PML)absorbing boundary based on the single-relaxation-time lattice Boltzmann(SRT-LB)equation to the MRT-LB equation,and further,propose a joint absorbing boundary through comparative *** give the specific forms of the modified MRT-LB equation loaded with the joint absorbing boundary in the two-dimensional(2D)and three-dimensional(3D)cases,***,we verify the effects of this absorbing boundary scheme on a 2D homogeneous model,2D modified British Petroleum(BP)gas-cloud model,and 3D homogeneous model,*** results reveal that by comparing with the viscous absorbing boundary and PML absorbing boundary,the joint absorbing boundary has the best absorption performance,although it is a little bit ***,this joint absorbing boundary better solves the problem of truncated boundary reflections of MRT-LBM in simulating seismic acoustic wavefields,which is pivotal to its wide application in the field of exploration seismology.