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A critical review on coupled geomechanics and fluid flow in naturally fractured reservoirs.

Hawez, Haval Kukha; Sanaee, Reza; Faisal, Nadimul Haque

Authors



Abstract

Naturally fractured reservoirs have been a source of challenging issues with regard to field development, well stability, drilling, and enhanced oil recovery, as a connected fracture system can totally dominate the flow patterns. Because of the high degree of heterogeneity in flow characteristics and reservoir geomechanics, several mathematical, numerical and discretization methods are proposed to predict the hydrodynamics behaviour of naturally fractured reservoirs. This paper presents a critical review of the characteristics of naturally fractured reservoirs in terms of geomechanics and fluid flow. In the case of poorly connected fractures and high-density fractured networks, compared to the characteristic length of interest, multi-continuum approaches are widely applicable. The dual continuum approach can handle fracture matrix interaction implicitly much more conveniently than the Discrete Fracture Network (DFN) and Discrete Fracture Matrix (DFM) approaches, but it cannot capture the fracture geometry explicitly where the fracture is the main flow path in the area of interest. Distinct mathematical and numerical modelling of flow and reservoir geomechanics are also addressed in this review paper. In this context, various coupling schemes of reservoir geomechanics and fluid flow are discussed. Recent research challenges related to numerical modelling of multiphase flow, reservoir geomechanics, coupling schemes, and discretization are also reviewed. It is concluded that despite several research efforts, coupled geomechanics and multiphase flow is still a challenging issue related to mathematical, numerical models and discretization schemes to capture the hydrodynamic behaviour, such as fracture deformation and fluid flow behaviour, at fracture matrix interaction in naturally fractured reservoirs and adopting the best modelling approach is very much dependent on the desired hydro-mechanical aspects to be investigated.

Citation

HAWEZ, H.K., SANAEE, R. and FAISAL, N.H. [2021]. A critical review on coupled geomechanics and fluid flow in naturally fractured reservoirs. Journal of natural gas science and engineering [online], In Press. Available from: https://doi.org/10.1016/j.jngse.2021.104150

Journal Article Type Article
Acceptance Date Jul 10, 2021
Online Publication Date Jul 14, 2021
Deposit Date Jul 19, 2021
Publicly Available Date Jul 15, 2022
Journal Journal of natural gas science and engineering
Print ISSN 1875-5100
Publisher Elsevier
Peer Reviewed Peer Reviewed
Article Number 104150
DOI https://doi.org/10.1016/j.jngse.2021.104150
Keywords Geomechanics; Fractured reservoirs; Coupling scheme; Modelling; Fracture-matrix interaction
Public URL https://rgu-repository.worktribe.com/output/1386448