Banca de QUALIFICAÇÃO: TULIO DE MOURA CAVALCANTE

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : TULIO DE MOURA CAVALCANTE
DATE: 11/06/2021
LOCAL: Sala virtual
TITLE:

COMPUTATIONAL SIMULATION OF 3-D NATURALLY FRACTURED OIL RESERVOIRS USING LOCALLY CONSERVATIVE METHODS

KEY WORDS:

Fluid flows simulation. Heterogeneous and anisotropic reservoirs. Naturally fractured reservoirs. Embedded fractures models. MPFA-D. DMP compliance.

PAGES: 40
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

Fluid flows in fractured porous media is a truly relevant phenomenon, because most of the remaining oil reserves around the world reside in this type of formations, in addition to the fact that fractures are also present in less deep layers of the crust, which makes them also influential in water extraction and waste dispersion. Single-phase flows, by the way, can be mathematically described by a system of nonlinear partial differential elliptic equations (pressure equation), but modeling this type of problem represents a great challenge, due to the complexity of depositional environments, beyond the presence of the fractures. In such cases, it is particularly complex to construct structured meshes capable of adequately modeling the reservoir. In this work, a new strategy is being developed to simulate the fluid flows in three-dimensional fractured porous media whose model is discretized as a mesh of tetrahedrons. Such a strategy is based on a multi-point flux approach that uses the so-called "diamond stencil" (MPFA-D) for solving pressure equation and on embedded fractures models (EDFM and pEDFM) to include their influences in the reservoir global model. MPFA-D is a robust and flexible formulation, capable of handling highly heterogeneous and anisotropic domains, achieving second order accuracy on the scalar variable. On the other hand, it is not guaranteed to be monotone, characteristic that can be enhanced by the presence of the fractures, so that, in parallel, we have been studying non-linear alternatives to prevent MPFA-D violating discrete minimum and maximum principle (DMP). The embedded fractures models, in turn, have the advantage of not needing the mesh fitting to the fractures positions. In short, we intend to develop a robust, flexible and computationally efficient tool that does not return non-physical solutions on simulations of fluid flows in 3-D fractured porous media.

BANKING MEMBERS:
Presidente - 1218780 - PAULO ROBERTO MACIEL LYRA
Externo à Instituição - PHILIPPE REMY BERNARD DEVLOO - UNICAMP
Interno - 2216046 - RAMIRO BRITO WILLMERSDORF