Estimation of discontinuity spacing and trace length using scanline surveys

Priest, Stephen D.; Hudson, John

doi:10.1016/0148-9062(81)90973-6

Cited by 553 publications

(217 citation statements)

References 5 publications

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“…information from seismic data or borehole image logs) that exhibit only limited data on the fracture system in the considered geothermal reservoir. Priest (1993) provides a detailed summary of the description and the sampling of discontinuities for rock engineering. Sampling bias is introduced when measuring fracture parameters.…”

Section: Fracture Network Analysismentioning

confidence: 99%

“…Methods for the measurement of fracture orientation are described by several authors (e.g. Lee and Farmer 1993;Priest 1993). Fracture orientation is usually determined both in outcrops with a compass and from boreholes or cores (Narr 1996;Wu and Pollard 2002).…”

Section: Fracture Network Analysismentioning

confidence: 99%

“…The observed fracture trace lengths also need to be corrected for sampling bias (e.g. Priest and Hudson 1981;Pickering et al 1995). For this study, the fracture lengths were obtained from two-dimensional outcrop trace mappings.…”

Section: Fracture Network Analysismentioning

confidence: 99%

“…fracture orientation, fracture length, fracture spacing and effective hydraulic aperture; e.g. Priest 1993;Lee and Farmer 1993). Due to the lack of in situ data from the deep geothermal reservoir, field measurements of outcrop reservoir analogues were conducted to get a quantitative description of the DFN that occurs in the studied fractured sandstone.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the representative elementary volume (REV) of a fractured geothermal sandstone reservoir

2010

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The objective of this study is to evaluate a representative elementary volume (REV) in a fractured geothermal sandstone reservoir in Germany using the discrete fracture network (DFN) model approach. Due to the lack of in situ data from the deep geothermal reservoir, field measurements of outcrop reservoir analogues were conducted to get a quantitative description of the DFN. Field measurements reveal that the geometry of the DFN is largely influenced by the lithological layering (e.g. relationship between joint spacing and bed thickness). Thus, DFN models have to be completed individually for each layer since each bed is distinct compared to its neighbouring beds. Various DFNs were generated using statistical-derived fracture input data. The two-dimensional universal distinct element code UDEC was used for fracture flow simulations. In order to determine the minimum REV, the equivalent average conductivity tensors were obtained with increasing block size. Plots of conductivity tensor coefficients versus block size exhibit only minor variation of the hydraulic properties with increasing block size. Hence, an REV size of 10 m 9 10 m could be determined for all studied stochastically derived discrete fracture networks.

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Section: Fracture Network Analysismentioning

confidence: 99%

Section: Fracture Network Analysismentioning

confidence: 99%

Section: Fracture Network Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the representative elementary volume (REV) of a fractured geothermal sandstone reservoir

2010

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“…Therefore, trace length is normally considered as an indication of discontinuity persistence. Values of trace length typically display a Negative Exponential, Power Law or Log Normal distribution, whereby the frequency of very persistent discontinuities is much less than that of less persistent discontinuities (Priest and Hudson 1981;Cai 2011). Elmo (2006 used Log Normal distributions to describe fracture size distributions from the 2D mapped trace length at the Middleton mine, Derbyshire, UK.…”

Section: Discontinuity Trace Lengthmentioning

confidence: 99%

A Combined Remote Sensing–Numerical Modelling Approach to the Stability Analysis of Delabole Slate Quarry, Cornwall, UK

et al. 2015

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Modelling failure mechanisms to explain rock slope change along the Isle of Purbeck coast, UK

Allison

Kimber

1998

Earth Surf. Process. Landforms

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Results are presented of distinct element computer modelling used to examine rates and mechanisms of change in rock slopes and cliffs, where material intact properties determine process and form but the most significant controls are the joint pattern and cross-joint properties. The modelling approach does not appear to have been used before in a geomorphological context and provides an alternative approach for examining cliff development. Field and laboratory data have been collected for the Portland Limestone outcrop of the Isle of Purbeck, central southern England. The Portland Limestone is a hard, shelly, crystalline sediment of the Upper Jurassic. It has a regular discontinuity pattern throughout the outcrop in Purbeck. While joint orientation remains relatively constant, bedding changes from horizontal to vertical, a consequence of the Purbeck Monocline. There are resulting implications for spatial variations in rock slope evolution. The modelling exercise enhances previous knowledge on rock failure mechanisms and slope development along the Purbeck coast and demonstrates its potential in research where landforms are developed in lithified, jointed rock masses.

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Estimation of discontinuity spacing and trace length using scanline surveys

Cited by 553 publications

References 5 publications

Evaluation of the representative elementary volume (REV) of a fractured geothermal sandstone reservoir

Evaluation of the representative elementary volume (REV) of a fractured geothermal sandstone reservoir

A Combined Remote Sensing–Numerical Modelling Approach to the Stability Analysis of Delabole Slate Quarry, Cornwall, UK

Modelling failure mechanisms to explain rock slope change along the Isle of Purbeck coast, UK

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