Three-dimensional annular saturated crack propagation in ultralow permeability rock under wave & electro-magneto-thermo-elastic fields
This contribution presents a new theory with lattice Boltzmann & finite element & hypersingular integral equation (LB-FE-HIE) to explore the three-dimensional pore-network cracks transient hydrofacturing-liquefaction in tight sandstone (3D PC-TH-TS) under seismic waves & electro-magneto-thermo-elastic fields through intricate theoretical analysis and numerical simulations.First,the 3D PN-TH-TS problem is reduced to solving a set of coupled LB-FE-HIEs by using the Green functions and distribution functions,in which the unknown functions are the extended pore-network cracks displacement discontinuities.Then,the behavior of the extended displacement discontinuities at the pore-network cracks surface terminating at the solid-liquid film interface are analyzed through extended dynamic hypersingular integral main-part analysis method of LB-FE-HIEs.Closed formed solutions for the extended singular dynamic stress,the extended dynamic stress intensity factor and the extended dynamic energy release rate near the dislocations interface are provided.Last,the tight sandstone sample from the Ordos Basin Triassic formation is selected,the fluid-solid coupled digital rock physical modeling is established,and the simulations of 3D PC-TH-TS process is presented on the parallel CPU-GPU platform.The hydrofacturing-liquefaction varying with the amplitude,frequency and constituting time of earthquake wave is obtained.The relationship between the tight sandstone pore-network cracks transient propagation-evolution and the maximum tight sandstone fracturing-liquefaction stress criteria is explored.
Hydrofracturing-liquefaction tight sandstone lattice Boltzmann method finite element method hypersingular integral equation seismic wave & electro-magneto-thermo-elastic fields parallel CPU-GPU technology
BoJing Zhu YaoLin Shi TianYou Fan
Key Laboratory of Computational Geodynamics of CAS,University of Chinese Academy of Sciences,Beijing Key Laboratory of Computational Geodynamics of CAS,University of Chinese Academy of Sciences,Beijing Beijing Institute of Technology,Beijing 100081,CHINA
国际会议
北京
英文
1-15
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）