Rescaling of fluid-conducting fault structures

Петров, В. А.; Lespinasse, Marc; Poluektov, V. V.; Ustinov, S. A.; Minaev, V. A.

doi:10.1134/s1028334x17020027

Cited by 3 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Discussionsupporting

confidence: 92%

“…The farthest zone from the fault trace is characterized by the highest porosity and permeability; cataclasites and blastocataclasites are predominant there, and brittle deformations dominate. This model is consistent with most of the previously proposed models of fault zones [11,[16][17][18][19][20][21]33,69]. Tectonophysical studies usually result in detecting variations of the parameters of the stress-strain field, which, in its turn, makes it possible to reconstruct the sequence of changes in deformations [3][4][5][6][7][8][9][10][11][12].…”

Section: Discussionsupporting

confidence: 87%

“…Depending on the tasks being solved and the scale of the objects under study, various methods from microstructural and petrophysical analyses to numerical methods of continuum mechanics and physical modeling are used [13][14][15]. A reconstruction of the stress-strain field can be successful only after detailed structural studies, mapping smallest changes in tectonic deformations and taking into account the lithological factors and the interaction of structures at different scales [16,17]. Additional information in many cases can decide the interpretation of the obtained data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prospects of Geoinformatics in Analyzing Spatial Heterogeneities of Microstructural Properties of a Tectonic Fault

et al. 2022

View full text Add to dashboard Cite

The paper proposes a special technique for microstructural analysis (STMA) of rock samples based on two provisions. The first one is an algorithm for the automatic detection and digitalization of microstructures in images of oriented thin sections. The second one utilizes geographic information system (GIS) tools for an automatized analysis of objects at the micro scale. Using STMA allows the establishment of geometric features of fissure and pore space of rock samples to determine the parameters of stress–strain fields at different stages of rock massif deformation and to establish a relationship between microstructures and macrostructures. STMA makes it possible to evaluate the spatial heterogeneity of physical and structural properties of rocks at the micro scale. Verification of STMA was carried out using 15 rock samples collected across the core of the Primorsky Fault of the Baikal Rift Zone. Petrographic data were compared to the quantitative parameters of microfracture networks. The damage zone of the Primorsky Fault includes three clusters characterized by different porosity, permeability, and deformation type. Findings point to the efficiency of STMA in revealing the spatial heterogeneity of a tectonic fault.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prospects of Geoinformatics in Analyzing Spatial Heterogeneities of Microstructural Properties of a Tectonic Fault

et al. 2022

View full text Add to dashboard Cite

show abstract

Scale Effect in a Fluid-Conducting Fault Network

et al. 2019

View full text Add to dashboard Cite

Influence of random parameter joint length on rock electrical conductivity

Sizin

Вознесенский

Kidima-Mbombi

2023

Min.Sci.Technol. (RUS)

View full text Add to dashboard Cite

Rock joint hollowness coefficient is an important parameter when resolving practical mining problems. Geophysical methods used to resolve this problem are indirect. Thus the interpretation of their results may cause certain difficulties as a result of the uncertainty of the physical relationships between the parameters of joints and the measurement results. One of the ways to resolve this problem is to combine experimental research methods with analytical and numerical simulation. The studies were aimed at investigating the electrical conductivity of a two-dimensional medium in the presence of thin insulating (non-conducting) joints. This paper proposes an analytical method for assessing the dependence of the specific conductivity of a medium with inclusions in the form of elliptical joints on their half-length. This dependence is show to have the form of an exponent depending on the square of the length of the maximum semi-axis as an argument. The simulation method is based on the assumption of the elliptical shape of a joint when the length of the minor semi-axis of the ellipses tends to zero. A review of publications and their results presented in this paper showed that this method for determining the specific conductivity of the medium with thin joints is one of the best in terms of compliance with experimental data. Its predictions are close to those of the Effective Media Approximation (EMA). However, the proposed method is distinguished by the simplicity of the formulas and their physical visibility essential for the use in interpreting the data of a physical experiment. In two-dimensional formulation, numerical simulation of the specific electrical conductivity of a sample of a medium measuring 1×1 m with elliptical joints of conductivity less than that of the matrix was carried out in the COMSOL Multiphysics environment. A square sample of unit sizes with unit conductivity was considered in which 25 joints with uniform distribution along the length occurred. 40 models were built wherein the maximum length of the joints varied from 0.01 to 0.4 sample size in increments of 0.01 m. The satisfactory concordance of the results of numerical and analytical models, both visual and confirmed by statistical estimates, has been shown. It was noted that when the size of the joints changes to achieve the value of the maximum semi-axis α = 0.15 m, the influence of single joints that do not extend beyond the boundaries of the sample prevails. Above this value, at α > of 0.15 m, the influence of joint coalescence, as well as their extension to and beyond the sample boundaries begins to affect. Comparison of the proposed theoretical model of electrical conductivity, depending on the square of the length of the maximum semi-axis of a joint, with a similar model in the form of an exponent with a linear dependence showed a better concordance of the proposed model with observations at the stage of the lack of joint coalescence and their extension to the sample boundaries at α < 0.15 m. At α > 0.15 m. The proposed model has a lower coefficient of determination compared to the full range including both intervals, but higher than that of the model with a linear dependence in the exponent argument. This indicates the universal nature of the proposed model.

show abstract

Rescaling of fluid-conducting fault structures

Cited by 3 publications

References 10 publications

Prospects of Geoinformatics in Analyzing Spatial Heterogeneities of Microstructural Properties of a Tectonic Fault

Prospects of Geoinformatics in Analyzing Spatial Heterogeneities of Microstructural Properties of a Tectonic Fault

Scale Effect in a Fluid-Conducting Fault Network

Influence of random parameter joint length on rock electrical conductivity

Contact Info

Product

Resources

About