Banca de DEFESA: TASSO CARVALHO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : TASSO CARVALHO DA SILVA
DATE: 20/07/2022
TIME: 09:00
LOCAL: Pos Graduação Engenharia Civil
TITLE:

Numerical Analysis Of Failure Reactivation Associated With Fluid Injection And Production In Reservoir

KEY WORDS:

Fault reactivation, Petroleum reservoir simulation, Geomechanical analysis.

PAGES: 88
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The study of fault zones is of paramount importance for safety in the oil production process. The fault reactivation process can lead to surface deformations, subsidence and exudation of fluids on the surface of the seabed, resulting in environmental and economic damages. Therefore, it is a coupled hydromechanical problem and the fault activation is governed by the boundary conditions of the problem and can be numerically modeled involving constitutive models suitable for the materials involved. The fault can be represented by just one filler material or divided into core and damage zones, which is an approximation consistent with field observations. This dissertation presents the hydromechanical coupled numerical simulation of two hypothetical scenarios regarding the reactivation of faults due to the change of the pressure field inside a reservoir. In the first one, a reservoir in oil production with the possibility of fault reactivation was simulated, evaluating the impact of reactivation on the stress-strain response of a submarine slope located on the seabed, over the field. The reservoir sectioned by a fault zone is subject to the operation of an injection well and another producer. The fault zone is assumed as an initially sealing region presenting itself as a geomechanical and hydraulic discontinuity of the field. The geological fault reactivation acted as a trigger of possible slope instability, causing horizontal and vertical displacements. The second scenario involves the modeling of fault reactivation of a field whose model was built from the interpretation of seismic data from the Laurentian Basin, in an offshore environment in Canada. A finite element procedure is presented that models the fluid flow in a deformable reservoir crossed by a fault system in a coupled and implicit way, considering the fault divided into core and damage zones. Numerical simulations were performed applying the finite element method, through the Mohr-Coulomb model, with Perzyna viscous regularization, using the in-house code CODE-BRIGHT. The simulation of the constitutive behavior of sealant failures led to the prediction of the possibility of failure reactivation and to the sensitivity analysis regarding the resistance property of the materials in the failure zone.

BANKING MEMBERS:
Externa à Instituição - DEBORA CRISTINA ALMEIDA DE ASSIS - UFAL
Presidente - 1413233 - LEONARDO JOSE DO NASCIMENTO GUIMARAES
Externo ao Programa - 1032097 - TIAGO SIQUEIRA DE MIRANDA