摘要
当介质的几何结构复杂或者内部存在强物性界面时,传统的地震波正演模拟方法的计算结果往往难以满足实际精细波场计算的要求。多松弛时间格子Boltzmann方法(MRT-LBM)是一种新兴数值模拟方法,具有稳定性好、计算精度高、边界处理灵活等优点。针对MRT-LBM数值模拟时面临的人工截断边界,提出了一种基于多松弛参数的黏滞吸收边界方案。由于边界反射的压制效果对衰减参数很敏感,因此通过大量数值模拟实验选择了最优参数组合,获得了适用性强的吸收边界条件。该吸收边界条件的算法简单,且可扩展性强。最后应用均匀模型和简单非均质模型验证了其吸收效果,并用复杂的BP模型验证了其适用性。
When the geometric structure of the medium is complicated or there are strong physical discontinuities inside,the calculation results by traditional forward simulation methods of seismic waves are often difficult to meet the requirements of actual fine calculation for the wave field.The multiple-relaxation-time lattice Boltzmann method(MRT-LBM)is an emerging approach for numerical simulation,with good stability,high calculation accuracy,and flexible boundary processing.Aiming at the artificial truncated boundary faced by MRT-LBM numerical simulation,a viscous absorbing boundary scheme based on multiple relaxation parameters was proposed.Since the suppression effect of the boundary reflection was very sensitive to the attenuation parameters,massive numerical simulation experiments were conducted to determine the optimal parameter combination,and the absorbing boundary conditions with strong applicability were obtained.The absorbing boundary conditions were of a simple algorithm,with strong scalability.Finally,a uniform model and a simple heterogeneous model were built to verify the absorption effect,and a complex BP model was used to verify the applicability.
作者
姜春涛
周辉
夏木明
唐瑾璇
王颖
JIANG Chuntao;ZHOU Hui;XIA Muming;TANG Jinxuan;WANG Ying(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;CNPC Key Laboratory of Geophysical Exploration,China University of Petroleum(Beijing),Beijing 102249,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China;Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences,Beijing 100029,China;Beijing Institute of Aerospace Control Devices,Beijing 100094,China;Beijing Engineering Research Center of Optical Fiber Sensing System,Beijing 100094,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2021年第5期1030-1038,I0010,I0011,共11页
Oil Geophysical Prospecting
基金
国家自然科学基金项目“弹簧网络模型和格子玻尔兹曼模型耦合的含流体孔隙介质波场模拟方法研究”(41874130)
国家自然科学基金联合基金项目“深层复杂构造与储层地震波场传播机理研究”(U19B6003-04-01)
国家重点研发计划变革性技术关键科学问题重点专项“多信息相容约束高效全波形反演方法研究”(2018YFA0702502)
中国博士后科学基金项目“基于格子玻尔兹曼—弹簧网络模型的波场模拟及流—固耦合方法研究”(2020M680667)
青岛海洋科学与技术试点国家实验室“问海计划”项目“光纤激光水听器阵列研究”(2017WHZZB0602)联合资助。
