Evaluation of a workflow to derive terrestrial light detection and ranging fracture statistics of a tight gas sandstone reservoir analog

Wüstefeld, Patrick; Medeiros, Maite de; Koehrer, Bastian; Sibbing, Dominik; Kobbelt, Leif; Hilgers, Christoph

doi:10.1306/04251817103

Cited by 4 publications

(6 citation statements)

References 109 publications

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“…High-resolution 3-D images of outcrop surfaces (more like 2.5-D) can be captured by laser scanning, which can be ground based or acquired by UAV (e.g. Bisdom et al, 2017;Gao et al, 2017;Wüstefeld et al, 2018). From the laser scans, 3-D images of the outcrop surface (3-D virtual outcrop) can be generated using techniques such as structure from motion (SfM) photogrammetry (Vasuki et al, 2014).…”

Section: Summary Of Fracture Data Capture Methodsmentioning

confidence: 99%

“…From the laser scans, 3-D images of the outcrop surface (3-D virtual outcrop) can be generated using techniques such as structure from motion (SfM) photogrammetry (Vasuki et al, 2014). These can provide additional information on fracture orientation through the use of advanced image analysis techniques (Wüstefeld et al, 2018). These methods have been used for advanced fracture network analysis and modelling for applications related to fluid flow, gas migration and engineering/construction (e.g.…”

Section: Summary Of Fracture Data Capture Methodsmentioning

confidence: 99%

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Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

et al. 2020

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Abstract. Understanding the impact of fracture networks on rock mass properties is an essential part of a wide range of applications in geosciences from understanding permeability of groundwater aquifers and hydrocarbon reservoirs to erodibility properties and slope stability of rock masses for geotechnical engineering. However, gathering high-quality, oriented-fracture datasets in the field can be difficult and time-consuming, for example, due to constraints on field work time or access (e.g. cliffs). Therefore, a method for obtaining accurate, quantitative fracture data from photographs is a significant benefit. In this paper we describe a method for generating a series of digital fracture traces in a geographic information system (GIS) environment, in which spatial analysis of a fracture network can be carried out. The method is not meant to replace the gathering of data in the field but to be used in conjunction with it, and it is well suited when field work time is limited or when the section cannot be accessed directly. The basis of the method is the generation of the vector dataset (shapefile) of a fracture network from a georeferenced photograph of an outcrop in a GIS environment. From that shapefile, key parameters such as fracture density and orientation can be calculated. Furthermore, in the GIS environment more complex spatial calculations and graphical plots can be carried out such as heat maps of fracture density. Advantages and limitations compared to other fracture network capture methods are discussed.

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Section: Summary Of Fracture Data Capture Methodsmentioning

confidence: 99%

Section: Summary Of Fracture Data Capture Methodsmentioning

confidence: 99%

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

et al. 2020

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“…Outcrops provide access to naturally formed fracture patterns (Figures 2 and 4) and a means to compare predictive statistical or mechanical models to nature (Pollard & Aydin, 1988). Data sets from outcrops avoid the limitations of borehole-based sampling and encompass features below the resolution of seismic methods that would otherwise be missed (Bellahsen et al, 2006;Corbett et al, 1987;Gutmanis et al, 2018;Seers & Hodgetts, 2014;Ukar et al, 2019;Watkins et al, 2015;Wennberg et al, 2016;Wüstefeld et al, 2018). Consequently, outcrop fracture studies are an essential element in a strategy for learning about fracture patterns existing at depth.…”

Section: Problems and Advantages Of Outcrop Fracturesmentioning

confidence: 99%

“…Consequently, outcrop fracture studies are an essential element in a strategy for learning about fracture patterns existing at depth. Outcrop fracture mapping is undergoing a renaissance owing to recent advances in remote sensing, drone-based imaging, advanced image processing, and feature extraction of outcrop-based data sets (Bisdom et al, 2014(Bisdom et al, , 2017Hardebol & Bertotti, 2013;Healy et al, 2017;Madjid et al, 2018;Pollyea & Fairley, 2011;Wüstefeld et al, 2018).…”

Section: Problems and Advantages Of Outcrop Fracturesmentioning

confidence: 99%

“…Because fracture data are difficult to acquire and interpret (Figures and and section ), fracture patterns remain stubbornly indistinct and unpredictable despite more than a century of progress in a number of important areas including detection, sophisticated mechanics‐based and statistical modeling approaches, and expensive drilling and well testing campaigns in the private and public sector. A review of the challenges reveals that severe limitations remain despite a new round of research drilling (e.g., Gale et al, ) and a revolution in outcrop fracture pattern description based on remote and drone‐based imaging (e.g., Pollyea & Fairley, ; Menegoni et al, ; Wüstefeld et al, ). These limitations persist because subsurface patterns, particularly on scales of a meter or more, cannot be reliably inferred from borehole samples as they are currently analyzed, and models are difficult to validate.…”

Section: The Challenge Of Natural Fractures In the Earthmentioning

confidence: 99%

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The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

Laubach

Lander²,

Criscenti

et al. 2019

Reviews of Geophysics

228

106

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Fracture pattern development has been a challenging area of research in the Earth sciences for more than 100 years. Much has been learned about the spatial and temporal complexity inherent to these systems, but severe challenges remain. Future advances will require new approaches. Chemical processes play a larger role in opening‐mode fracture pattern development than has hitherto been appreciated. This review examines relationships between mechanical and geochemical processes that influence the fracture patterns recorded in natural settings. For fractures formed in diagenetic settings (~50 to 200 °C), we review evidence of chemical reactions in fractures and show how a chemical perspective helps solve problems in fracture analysis. We also outline impediments to subsurface pattern measurement and interpretation, assess implications of discoveries in fracture history reconstruction for process‐based models, review models of fracture cementation and chemically assisted fracture growth, and discuss promising paths for future work. To accurately predict the mechanical and fluid flow properties of fracture systems, a processes‐based approach is needed. Progress is possible using observational, experimental, and modeling approaches that view fracture patterns and properties as the result of coupled mechanical and chemical processes. A critical area is reconstructing patterns through time. Such data sets are essential for developing and testing predictive models. Other topics that need work include models of crystal growth and dissolution rates under geological conditions, cement mechanical effects, and subcritical crack propagation. Advances in machine learning and 3‐D imaging present opportunities for a mechanistic understanding of fracture formation and development, enabling prediction of spatial and temporal complexity over geologic timescales. Geophysical research with a chemical perspective is needed to correctly identify and interpret fractures from geophysical measurements during site characterization and monitoring of subsurface engineering activities.

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The joint sets on the Lilstock Benches, UK. Observations based on mapping a full resolution UAV-based image

Passchier¹,

Passchier²,

Weismüller³

et al. 2021

Preprint

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Evaluation of a workflow to derive terrestrial light detection and ranging fracture statistics of a tight gas sandstone reservoir analog

Cited by 4 publications

References 109 publications

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

The joint sets on the Lilstock Benches, UK. Observations based on mapping a full resolution UAV-based image

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