气候变化领域集成服务门户(CCPortal): A Green element method-based discrete fracture model for simulation of the transient flow in heterogeneous fractured porous media

CCPortal

DOI	10.1016/j.advwatres.2019.103489
	A Green element method-based discrete fracture model for simulation of the transient flow in heterogeneous fractured porous media
	Wu Y.; Cheng L.; Fang S.; Huang S.; Jia P.
发表日期	2020
ISSN	0309-1708
卷号	136
英文摘要	Advances in hydraulic fracturing technology are promoting global interest in the simulation of the transient flow in fractured porous media. Boundary element method (BEM) is widely used in pressure transient analysis because of its high precision and simple discretization of the boundaries and the fractures. However, BEM is computationally expensive when real heterogeneities and large numbers of fractures are modeled. A Green element method (GEM)-based discrete fracture model (DFM) is proposed in this paper to address this problem, and this is the first study to enrich the GEM in modeling the transient behavior of heterogeneous porous media with discrete fracture networks. GEM is applied to handle formation heterogeneities and discrete fractures. First, a new mathematic model and integral formulation are proposed with the consideration of formation heterogeneities and discrete fractures. Next, structured Cartesian grids are used to discretize the domain and characterize the heterogeneities, and discrete fracture networks are embedded into the domain grids. Then, GEM is used to handle fluid flow between connected domain blocks and between a domain block and connected discrete fracture segments. The finite difference method (FDM) is used to model fluid flow between connected discrete fracture segments. The solution of the model is obtained by coupling the two systems. Two validation cases and several synthetic cases are used to verify the precision, efficiency, and application of the proposed GEM-based DFM. The results show that the proposed model is precise and efficient by comparing it to the BEM and a commercial simulator. The number of integrals and the computation are largely decreased by applying the boundary integral equation to each local block. Finally, a field example with several synthetic cases is studied to show the model's application. The proposed GEM-based DFM serves as a good tool for simulation of the transient flow in heterogeneous fractured porous media. © 2019
关键词	Boundary element method Boundary integral equations Finite difference method Porous materials Sailing vessels Transient analysis Transition flow Discrete-fracture models Green element method Heterogeneity Hybrid model Reservoir simulation Transient behavior Fracture boundary element method finite difference method flow modeling fluid flow fractured medium hydraulic fracturing porous medium transient flow
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131870
推荐引用方式 GB/T 7714	Wu Y.,Cheng L.,Fang S.,et al. A Green element method-based discrete fracture model for simulation of the transient flow in heterogeneous fractured porous media[J]. Advances in Water Resources,2020,136.
APA	Wu Y.,Cheng L.,Fang S.,Huang S.,&Jia P..(2020).A Green element method-based discrete fracture model for simulation of the transient flow in heterogeneous fractured porous media.,136.
MLA	Wu Y.,et al."A Green element method-based discrete fracture model for simulation of the transient flow in heterogeneous fractured porous media".136(2020).