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fracture aperture

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Journal Article
Journal: AAPG Bulletin
Published: 01 July 2016
AAPG Bulletin (2016) 100 (7): 1075–1097.
... analog data. However, these data provide little information on subsurface fracture aperture, which is essential for quantifying porosity and permeability. Apertures are difficult to obtain from either outcropping or subsurface data and are therefore often based on fracture size or scaling relationships...
FIGURES | View All (12)
Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP370.9
EISBN: 9781862396180
... Abstract A correlation is demonstrated between the presence of crack-seal texture and power-law kinematic aperture-size (width) distributions among opening-mode fractures in rocks of dominantly carbonate mineralogy. Crack-seal opening increments (opening-displacement increment sizes or ‘gaps...
FIGURES | View All (8)
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/GSL.SP.2007.270.01.08
EISBN: 9781862395183
... bridges propping the fractures open and preserving fracture porosity. These diagenetic effects are examined in the context of detailed fracture characterizations generated by geomechanical modelling. Aperture, length and fracture network geometry are examined in the context of subcritical crack growth...
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Journal Article
Published: 22 July 2020
Journal of the Geological Society (2020) 177 (6): 1281–1293.
... distribution for fracture sizes (aperture and length), with random to clustered spacing and high connectivity indices. Regional variations between the Scottish mainland and the Outer Hebrides are recognized that compare directly with variations observed along the Rona Ridge in the Faeroe-Shetland basin. Here...
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Journal Article
Journal: Geophysics
Published: 27 May 2019
Geophysics (2019) 84 (4): WA115–WA125.
.../oil reservoirs. The sensitivity of the ultrasonic signatures (e.g., frequency content, velocity, amplitude, and attenuation) to the changes in fracture aperture caused by fluid-fracture surface interactions can be considered as a probe for flow-induced fracture aperture evolution. Flow-through tests...
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Journal Article
Journal: Geosphere
Published: 01 April 2016
Geosphere (2016) 12 (2): 558–571.
...Da Huo; Ronny Pini; Sally M. Benson Abstract Various methods have been proposed to measure fracture aperture distributions, including X-ray computed tomography (CT) imaging, which has the advantage that it can be combined with dynamic flow experiments. In this paper, we present a calibration-free...
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Journal Article
Journal: Geophysics
Published: 12 March 2015
Geophysics (2015) 80 (3): D175–D181.
... experiments with accurate measurements of all principal properties involved for electric borehole imaging. These properties are formation resistivity, mud resistivity, fracture aperture, pad position, and button current. The experiments were conducted on two types of limestone for fracture apertures ranging...
FIGURES | View All (6)
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP289.8
EISBN: 9781862395374
... initial strain state. Fracture statistics were analysed by grouping all fracture orientations into one population for these unique orthogonal pattern geometries. Fracture aperture distributions resembled negative exponential curve shapes, consistent with published observations for stratabound fractures...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 06 June 2022
Lithosphere (2022) 2022 (Special 10): 2097990.
...Na Huang; Yubao Zhang; Qian Yin; Yujing Jiang; Richeng Liu Abstract In order to investigate the combined effect of contact area, aperture variation, and fracture connectivity on the fluid flow through a fractured medium, a series of flow simulations were implemented on two types of three...
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Journal Article
Journal: Geophysics
Published: 01 July 1990
Geophysics (1990) 55 (7): 821–833.
... amount. Integration over a circular area is performed around these locations to gather all excessive currents; this integral is then geometrically reduced to approximate the line integral A. Line sharpening and neighborhood connectivity tests are done to trace the fractures, and apertures are computed...
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 27 April 2023
Lithosphere (2023) 2023 (1): 1118957.
.... Two fracture surfaces of a mesoscopic rough-walled fracture model were created. Results suggest that the nonlinear relationship between the normal stress and deformation due to the area of the total closure increases unevenly. Distributions of the mechanical aperture are approximated well by a normal...
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Journal Article
Published: 01 November 2015
Mineralogical Magazine (2015) 79 (6): 1485–1494.
... and erosion for purified montmorillonite samples in smooth planar fractures. In this paper, we investigate the influence of using MX-80 material (as delivered, i.e. including accessory minerals) and a naturally varying aperture on bentonite erosion. A bespoke fracture flow cell was constructed...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 15 June 2022
Lithosphere (2022) 2022 (1): 4655543.
...Haichun Ma; Jingping Wang; Jiazhong Qian; Peichao Feng; Xiaohui Tan; Qiankun Luo Abstract The fluid flow in fractured rock was determined by the aperture of fractures, which is influenced by the complex variation and wide distribution of in situ stress conditions. While extensive studies focused...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 27 June 2022
Lithosphere (2022) 2022 (Special 10): 5775275.
...Zhou Chen; Zhengying Tian; Hongbin Zhan; Jingtao Huang; Yong Huang; Yunbo Wei; Xing Ma Abstract Abrupt changes in aperture (sudden expansion and contraction) are commonly seen in naturally occurred or artificial single fractures. The relevant research mainly focuses on the changes in fluid...
FIGURES | View All (13)
Journal Article
Journal: GSA Bulletin
Published: 01 September 2014
GSA Bulletin (2014) 126 (9-10): 1340–1362.
...J.N. Hooker; S.E. Laubach; R. Marrett Abstract A high-resolution data set of kinematic aperture (opening displacement) of opening-mode fractures, from large (up to 2 m long) quartz-cemented sandstone samples, shows that microfractures are ubiquitous and that most natural-fracture sets are better...
FIGURES | View All (18)
Series: Geological Society, London, Special Publications
Published: 01 January 2003
DOI: 10.1144/GSL.SP.2003.215.01.06
EISBN: 9781862394636
... Abstract Microfocus X-ray computed tomography (μCT) was used as a tool to determine the apertures of a fracture in a cylindrical sample of crinoidal limestone. After scanning, artefacts were removed from the images. Phantom objects were used to establish a calibration relationship between real...
Image
Fracture aperture modes when the fracture orientations formed different angles with respect to the MHSCD. (a) The fracture trend parallel to that of the MHSCD, (b) the trend of the fractures intersecting at an angle of 30° with the MHSCD, (c) the trend of the fractures intersecting at an angle of 45° with the MHSCD, (d) the trend of the fractures intersecting at an angle of 60° with the MHSCD, (e) the trend of the fractures intersecting at an angle of 75° with the MHSCD, and (f) the trend of the fractures perpendicular to the MHSCD. The black color indicates pores inside the fractures.
Published: 02 September 2024
Figure 15. Fracture aperture modes when the fracture orientations formed different angles with respect to the MHSCD. (a) The fracture trend parallel to that of the MHSCD, (b) the trend of the fractures intersecting at an angle of 30° with the MHSCD, (c) the trend of the fractures intersecting
Image
Influence of freeze-thaw on natural fracture aperture. (a) Aperture versus FT cycle; (b) natural fracture volume after repeated FT cycles.
Published: 23 January 2022
Figure 6 Influence of freeze-thaw on natural fracture aperture. (a) Aperture versus FT cycle; (b) natural fracture volume after repeated FT cycles.
Image
(a) The relationship between fracture strike and fracture aperture. (b) The distribution of filling degree in different fracture dips. (c) The relationship between fracture dip and fracture aperture. (d) Evaluation of relative importance of compactional processes and cementation to porosity development of sandstone, according to Ehrenberg (1989) and Li et al. (2011).
Published: 18 March 2021
Fig. 13. (a) The relationship between fracture strike and fracture aperture. (b) The distribution of filling degree in different fracture dips. (c) The relationship between fracture dip and fracture aperture. (d) Evaluation of relative importance of compactional processes and cementation
Image
Fracture aperture on a fluid‐filled fracture, (a) before slip and (b) after slip. (c) Fracture spacing along line in area of induced seismicity in the Clarks Hill Reservoir area and (d) attractors for an iterated function system of the form w(x)=a(i)x+b(i), in which a(i)=(−0.832,−0.176,0.086) and b(i)=(0.382,0.431,0.909).
Published: 15 January 2019
Figure 9. Fracture aperture on a fluid‐filled fracture, (a) before slip and (b) after slip. (c) Fracture spacing along line in area of induced seismicity in the Clarks Hill Reservoir area and (d) attractors for an iterated function system of the form w ( x ) = a ( i ) x + b ( i