A comparative study on simulating flow-induced fracture deformation in subsurface media by means of extended FEM and FVM

Li, Tingyu; Han, Dongxu; Yang, Fusheng; Yu, Bo; Sun, Dongliang; Wei, Jinjia

doi:10.2516/ogst/2020037

Cited by 7 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For fault tip enrichment, there are four extra degrees of freedom. This means sEFVM is much faster in terms of CPU time, but the predictions are usually less accurate (Li et al, 2020;Xu et al, 2021). Again, the DARTS results closely resemble the semi-analytical ones, while the sEFVM results display small deviations, especially near the stress peaks at y = ±75 m and y = ±150 m. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Benchmarking Analytical and Numerical Simulation of Induced Fault Slip

Novikov,

Behbahani,

Voskov

et al. 2024

Preprint

View full text Add to dashboard Cite

Pore pressure fluctuation in subsurface reservoirs and its resulting mechanical response can cause fault reactivation. Numerical simulation of such induced seismicity is important to develop reliable seismic hazard and risk assessments. However, modeling of fault reactivation is quite challenging, especially in the case of displaced faults, i.e., faults with non-zero offset. In this paper, we perform a systematic benchmarking study to validate two recently developed numerical methods for fault slip simulation. Reference solutions are based on a semi-analytical approach that makes use of inclusion theory and Cauchy-type singular integral equations. The two numerical schemes considered are both finite volume (FV) methods which consider discrete faults in different manners. One of them employs a conformal discrete fault model (DFM) while the other uses an embedded (non-conformal) fault model. The latter allows for flexible fault and rock matrix grids and is computationally attractive. It was found that both numerical methods accurately represent pre-slip stress fields caused by pore pressure changes. Moreover, they also successfully coped with the vertical frictionless fault. However, for the case with an inclined displaced fault with constant friction coefficient, the embedded method did not converge for the post-slip phase, whereas the DFM results did converge for both constant and slip-weakening friction coefficients. In its current implementation, the DFM is therefore the model of choice when accurate simulation of local faulted systems is required.

show abstract

Section: Resultsmentioning

confidence: 99%

Benchmarking Analytical and Numerical Simulation of Induced Fault Slip

Novikov,

Behbahani,

Voskov

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The interpolated surface was continuous, as well as its first derivative, except on some lines that had been specified as discontinuities. Li et al [5] compared the Extended Finite Element Method (XFEM) and the Extended Finite Volume Method (XFVM) in simulating the deformation of fractured porous media. It was found that the accuracy of the XFEM was slightly higher than that of the XFVM, but the latter was more efficient, which is useful in decision making regarding the choice of solving methods for the multi-field coupling problem in fractured porous media.…”

Section: Accepted: 22 February 2021mentioning

confidence: 99%