Characterization of fluid behavior in 3D digital fracture by shearing deformation and its representative elementary volume using Lattice Boltzmann Method

Kengo Ikuo, Fei Jiang, Takeshi Tsuji

Research output: Contribution to conferencePaper

Abstract

Fracture is fluid pathway of oil, natural gas and highly relates to structural trap. Depending on reservoir conditions, fracture can work as seal layer and also leak pathway. Thus, the structural properties of fracture have a great influence on the permeability. Permeability of fracture is usually measured by laboratory experiments, however few studies focused on calculating permeability by using flow simulation on digital fracture models. Here we use Lattice Boltzmann Method (LBM) to calculate the fluid velocity and permeability. Using LBM fluid flow simulation, we can easily change the reservoir parameters, such as temperature and aperture length of fracture. Here we use two natural fracture data: (1) non-sheared, and (2) sheared fracture models obtained by Ishibashi et al. (2015). After we digitalized these natural fractures, we numerically injected water into the two fracture models using LBM. To validate our simulation results, we compared the calculated permeability with the data of laboratory experiments. We then discussed the anisotropy of permeability on sheared model and the Representative Elementary Volume (REV) of the hydraulic properties of these fracture models as well. In this study, we extract several subdomains (i.e., small fracture models) from the whole model and estimate permeability of the subdomains. When the size of fracture model is smaller, the permeability estimated using LBM are scattered. However, the permeability is uniformly estimated when the model size is close to the whole model (0.1×0.15m). Therefore, the REV of the fracture model used in this study is ~0.1m. Because the hydraulic properties of fracture models smaller than REV are largely influenced by local heterogeneity, it is important to calculate hydraulic property by considering REV of sample.

Original languageEnglish
Publication statusPublished - Jan 1 2017
Event23rd Formation Evaluation Symposium of Japan 2017 - Chiba, Japan
Duration: Oct 11 2017Oct 12 2017

Other

Other23rd Formation Evaluation Symposium of Japan 2017
CountryJapan
CityChiba
Period10/11/1710/12/17

Fingerprint

Shearing
Fluids
fluid
permeability
hydraulic property
Flow simulation
Hydraulics
method
simulation
Seals
fluid flow
Structural properties
Flow of fluids
natural gas
Natural gas
Oils
Anisotropy
anisotropy
Experiments

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology
  • Energy Engineering and Power Technology
  • Economic Geology
  • Geochemistry and Petrology

Cite this

Ikuo, K., Jiang, F., & Tsuji, T. (2017). Characterization of fluid behavior in 3D digital fracture by shearing deformation and its representative elementary volume using Lattice Boltzmann Method. Paper presented at 23rd Formation Evaluation Symposium of Japan 2017, Chiba, Japan.

Characterization of fluid behavior in 3D digital fracture by shearing deformation and its representative elementary volume using Lattice Boltzmann Method. / Ikuo, Kengo; Jiang, Fei; Tsuji, Takeshi.

2017. Paper presented at 23rd Formation Evaluation Symposium of Japan 2017, Chiba, Japan.

Research output: Contribution to conferencePaper

Ikuo, K, Jiang, F & Tsuji, T 2017, 'Characterization of fluid behavior in 3D digital fracture by shearing deformation and its representative elementary volume using Lattice Boltzmann Method' Paper presented at 23rd Formation Evaluation Symposium of Japan 2017, Chiba, Japan, 10/11/17 - 10/12/17, .
Ikuo K, Jiang F, Tsuji T. Characterization of fluid behavior in 3D digital fracture by shearing deformation and its representative elementary volume using Lattice Boltzmann Method. 2017. Paper presented at 23rd Formation Evaluation Symposium of Japan 2017, Chiba, Japan.
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