A new approach for outcrop characterization and geostatistical analysis of a low-sinuosity fluvial-dominated succession using digital outcrop models: Upper Triassic Oukaimeden Sandstone Formation, central High Atlas, Morocco

Fabuel-Perez, I.; Hodgetts, David; Redfern, Jonathan

doi:10.1306/02230908102

Cited by 68 publications

(39 citation statements)

References 33 publications

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“…Ground-based T-LiDAR is a commonly used remote sensing technology that records high-resolution three-dimensional point clouds of the Earth's surface, and its use in geology has been growing in recent years (Pringle et al, 2006;Fabuel-Perez et al, 2009;Rotevatn et al, 2009;Wilson et al, 2009). However, karstic model development using T-LiDAR is a novel application.…”

Section: T-lidar and Elevation Datamentioning

confidence: 99%

Estimation of deep infiltration in unsaturated limestone environments using cave lidar and drip count data

Mahmud¹,

Mariethoz

Baker³

et al. 2016

Hydrol. Earth Syst. Sci.

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Abstract. Limestone aeolianites constitute karstic aquifers covering much of the western and southern Australian coastal fringe. They are a key groundwater resource for a range of industries such as winery and tourism, and provide important ecosystem services such as habitat for stygofauna. Moreover, recharge estimation is important for understanding the water cycle, for contaminant transport, for water management, and for stalagmite-based paleoclimate reconstructions. Caves offer a natural inception point to observe both the long-term groundwater recharge and the preferential movement of water through the unsaturated zone of such limestone. With the availability of automated drip rate logging systems and remote sensing techniques, it is now possible to deploy the combination of these methods for largerscale studies of infiltration processes within a cave. In this study, we utilize a spatial survey of automated cave drip monitoring in two large chambers of Golgotha Cave, southwestern Western Australia (SWWA), with the aim of better understanding infiltration water movement and the relationship between infiltration, stalactite morphology, and unsaturated zone recharge. By applying morphological analysis of ceiling features from Terrestrial LiDAR (T-LiDAR) data, coupled with drip time series and climate data from 2012 to 2014, we demonstrate the nature of the relationships between infiltration through fractures in the limestone and unsaturated zone recharge. Similarities between drip rate time series are interpreted in terms of flow patterns, cave chamber morphology, and lithology. Moreover, we develop a new technique to estimate recharge in large-scale caves, engaging flow classification to determine the cave ceiling area covered by each flow category and drip data for the entire observation period, to calculate the total volume of cave discharge. This new technique can be applied to other cave sites to identify highly focussed areas of recharge and can help to better estimate the total recharge volume.

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Section: T-lidar and Elevation Datamentioning

confidence: 99%

Estimation of deep infiltration in unsaturated limestone environments using cave lidar and drip count data

Mahmud¹,

Mariethoz

Baker³

et al. 2016

Hydrol. Earth Syst. Sci.

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“…3;2017 monosandbody (Fu et al, 2003;Labourdette & Jones, 2007;Donselaar & Overeem, 2008). Many methods have been proposed to extract parameters (MacDonald & Halland, 1993;Lyu, Ma, & Tian, 1994;Li, 1996;Liu, Yang, & Yang, 2004;Fabuel-Perez, Hodgetts, & Redfern, 2009;Wu, Hou, Wang, Cui, & Shuqing., 2014), and our research focuses on the technique for determining the obliquity of the thin interlayer superface based on the configuration of paired wells and abandoned channel surface.…”

Section: Configuration Parameter Extraction Of Lateral Accretion Thinmentioning

confidence: 99%

A Study of Architecture of Thin Interlayer within Meandering River Monosandbody of Thick-Bedded Oil Layers

Shan¹,

Lin

Chen³

et al. 2017

JGG

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This paper investigates the reservoir architecture of thin interlayer within meandering river monosandbody in the thick-bedded oil layers. The thin interlayer within the monosandbody of the terrestrial reservoir is one of the dominant factors which form the reservoir heterogeneity of fluid motion. It is of equal importance in comparison with the rhythmic distribution of permeability, and it is also the important content of the elaborate representation of reservoirs. However, previous researches of the heterogeneity of reservoir focus mostly on the theory of distribution disparity of the permeability and neglect the influence of thin interlayer on the heterogeneity. Therefore, taking the PⅠ2 individual reservoir at the Putaohua reservoir formation in Daqing oilfield as an example, this paper analyzes the distribution, formation, and the three-dimensional construction of the internal thin interlayer of the monosandbody from a new point of view, on the basis of which a set of cycle research technique about it is put forward. With the method of configuration parameter extraction, which is most important before establishing interlayer configuration in three dimensions, this study clarifies the classification, causes of formation and the differences of distinct monosandbodies. Ultimately, four categories of thin interlayer according to the characteristics of the studied area is divided and two dominate causes for thin interlayer formation is discussed: argillaceous and arenaceous rock interlayer through deposition and interlayer in process of sedimentary diagenesis.For the convenience of the study, here mainly focuses on the thick -thin interlayer. Techniques are taken the use of determining the obliquity of the thin interlayer superface based on the configuration of paired wells and abandoned channel surface. The causes for thin interlayer and their classification, distribution and the three-dimensional construction are entirely revealed, which would possess important geologic meaning for taking affective engineering measures in the aspects of the elaborate representation of oil reservoir, and the research of remaining oil formation and distribution.

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“…Data in digital outcrop studies can be collected using several tools such as terrestrial or airborne scanning LiDAR and laser ranging as well as Real Time Kinematic (RTK) or Differential (D) GPS, high-resolution shallow seismic, Ground Penetrating Radar (GPR) and boreholes (Corbeanu et al 2001;Hodgetts et al 2004;Jones et al 2004;Verwer et al 2004a;Verwer et al 2004b;Labourdette and Jones 2007;Viseur et al 2007;Engelkemeir and Khan 2008;Jones et al 2008a;2008b;Fabuel-Perez et al 2009a;Verwer et al 2009a;. Valuable additional data (e.g.…”

Section: Data Collectionmentioning

confidence: 99%

“…In order to solve this common problem a technique termed 'perpendicular projection plane' was developed. Fabuel-Perez et al (2009a) demonstrate the use of the technique in detail by which the mapped surfaces and channels and channel bars are projected onto a model generated plane perpendicular to flow direction (Figure 8a). The resulting projection gives the true geometries of channels and channel bars (white lines in Figure 8a) for a specific outcrop face orientation and palaeocurrent direction.…”

Section: Oukaimeden Sandstone Formation (Osf)mentioning

confidence: 99%

“…The use of digital field techniques is becoming a more common tool to aid fieldwork and some powerful applications have been demonstrated in recent studies, for example in sedimentological and structural studies (Hodgetts et al 2004;Verwer et al 2004b;Adams et al 2005;Labourdette and Jones 2007;Phelps and Kerans 2007;Olariu et al 2008;Phelps et al 2008;Fabuel-Perez et al 2009a;Hodgetts 2009;Verwer et al 2009a;Verwer et al 2009b;Wilson et al 2009) as well as in earth surface process (Wawrzyniec et al 2007;McCormick et al 2008) and ichnology (Bates et al 2008). Work has further focussed on how the digital data can best be captured and visualized, and in quantifying uncertainties inherent in the datasets (Bond et al 2007;Enge et al 2007;Verwer et al 2007;Buckley et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Applications of digital outcrop models: two fluvial case studies from the Triassic Wolfville Fm., Canada and Oukaimeden Sandstone Fm., Morocco

et al. 2009

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The application and benefits of employing digital outcrop models (DOMs) are discussed using two Triassic fluvial case studies to demonstrate data collection and integration methods. Developments in data analysis techniques are examined to demonstrate their utility for collecting meaningful and reliable statistical information needed to build realistic stochastic reservoir models. To establish a significant geostatistical dataset a large number of accurate observations are required. It is difficult to get the necessary statistics using subsurface data alone, due to the limited resolution and/or areal coverage of respectively seismic and well data. Outcrop studies are, therefore, commonly utilized to provide analogue statistical information (e.g. channel width, length, thickness and thickness vs. width ratio). Traditional data collection methods used in the field are however largely restricted to areas with (easy) physical access, or using remote observations with limited accuracy, such as photographic methods.Digital data collection techniques such as LiDAR (Light Detection and Ranging) and differential GPS allow more accurate measurements, as well as from previously inaccessible locations, to be taken of sedimentary architecture. The technique generates much larger volumes of measurements, as the area from which accurate data can be extracted is increased. This offers a more meaningful statistical dataset, hence reducing uncertainty in the final reservoir model.Both case studies, the Oukaimeden Sandstone Formation (OSF), Morocco and Wolfville Formation, Canada, are from Late Triassic braided fluvial systems. The OSF dataset has been used to illustrate how geometric information of channel width versus thickness relationships (W:T) are collected using a projection plane technique. The results show W:T variations between 3.49:1 in the Lower Oukaimeden member, 1.54:1 in the Middle Oukaimeden member and 3.75:1 in the Upper Oukaimeden member, demonstrating the observed architectural evolution of the fluvial system. The Wolfville Formation case study shows how DGPS in combination with LiDAR data has been used to more accurately map faults to obtain statistical information on fault orientation (NE-SW) and length (mean ¼ 38.3 m and median ¼ 18.2 m). Another applied analysis technique utilizes a facies classified point-cloud to aid surface correlations between sedimentary logs and construct a log based correlation panel from which estimates of facies frequencies are derived.

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A new approach for outcrop characterization and geostatistical analysis of a low-sinuosity fluvial-dominated succession using digital outcrop models: Upper Triassic Oukaimeden Sandstone Formation, central High Atlas, Morocco

Cited by 68 publications

References 33 publications

Estimation of deep infiltration in unsaturated limestone environments using cave lidar and drip count data

Estimation of deep infiltration in unsaturated limestone environments using cave lidar and drip count data

A Study of Architecture of Thin Interlayer within Meandering River Monosandbody of Thick-Bedded Oil Layers

Applications of digital outcrop models: two fluvial case studies from the Triassic Wolfville Fm., Canada and Oukaimeden Sandstone Fm., Morocco

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