Detection of a deep-water channel in 3D seismic data using the sweetness attribute and seismic geomorphology: a case study from the Taranaki Basin, New Zealand

Li, Quan; Yu, Shui; Wu, Wei; Liqing, Tong; Hongquan, Kang

doi:10.1080/00288306.2017.1307230

Cited by 29 publications

(11 citation statements)

References 22 publications

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“…The sweetness attribute is a division of the trace envelope by the square of the instantaneous frequency [49]. It is a useful attribute for delineating sand-confined channels [50][51][52] as well as a good indicator of hydrocarbon reservoirs correlating to bright spots [46,53]. Here, sweetness is also used to better resolve the BSR.…”

Section: Seismic Attribute Application: Frequency Attributesmentioning

confidence: 99%

Seismic Attribute Analyses and Attenuation Applications for Detecting Gas Hydrate Presence

et al. 2021

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Identifying gas hydrates in the oceanic subsurface using seismic reflection data supported by the presence of a bottom simulating reflector (BSR) is not an easy task, given the wide range of geophysical methods that have been applied to do so. Though the presence of the BSR is attributed to the attenuation response, as seismic waves transition from hydrate-filled sediment within the gas hydrate stability zone (GHSZ) to free gas-bearing sediment below, few studies have applied a direct attenuation measurement. To improve the detection of gas hydrates and associated features, including the BSR and free gas accumulation beneath the gas hydrates, we apply a recently developed method known as Sparse-Spike Decomposition (SSD) that directly measures attenuation from estimating the quality factor (Q) parameter. In addition to performing attribute analyses using frequency attributes and a spectral decomposition method to improve BSR imaging, using a comprehensive analysis of the three methods, we make several key observations. These include the following: (1) low-frequency shadow zones seem to correlate with large values of attenuation; (2) there is a strong relationship between the amplitude strength of the BSR and the increase of the attenuation response; (3) the resulting interpretation of migration pathways of the free gas using the direct attenuation measurement method; and (4) for the data analyzed, the gas hydrates themselves do not give rise to either impedance or attenuation anomalies that fully differentiate them from nearby non-hydrate zones. From this last observation, we find that, although the SSD method may not directly detect in situ gas hydrates, the same gas hydrates often form an effective seal trapping and deeper free gas accumulation, which can exhibit a large attenuation response, allowing us to infer the likely presence of the overlying hydrates themselves.

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Section: Seismic Attribute Application: Frequency Attributesmentioning

confidence: 99%

Seismic Attribute Analyses and Attenuation Applications for Detecting Gas Hydrate Presence

et al. 2021

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“…Li et al (2017), it was determined that the attribute map showed that the patchy sand deposited along the edge of the canyon (Figures 10 and 11a). In this study, by following the methodology described by Q.…”

Section: Stage 3: Low N:g Channel and Pelagic Shalementioning

confidence: 99%

“…Techniques such as time slicing and corenders sweetness and semblance attribute analysis are used to interpret the distribution of depositional elements (Q. Li, Yu, Wu, Tong, & Kang, 2017). These included the following:…”

Section: Seismic Facies and Depositional Elements Within The Centramentioning

confidence: 99%

“…In this study, by following the methodology described by Q. Li et al (2017), it was determined that the attribute map showed that the patchy sand deposited along the edge of the canyon (Figures 10 and 11a). Figure 11b shows that seven north-south small-scale turbidite channels developed within the canyon.…”

Section: Stage 3: Low N:g Channel and Pelagic Shalementioning

confidence: 99%

“…of modern and ancient ocean circulations (C. L.Gong, Wang, Zhu, Li, & Xu, 2013; X. Q Li et al, 2013;M. .However, through applying high-quality 3D seismic data and the seismic geomorphology analysis method (Q Li et al, 2017),. .However, through applying high-quality 3D seismic data and the seismic geomorphology analysis method (Q Li et al, 2017),.…”

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The Central Canyon depositional patterns and filling process in east of Lingshui Depression, Qiongdongnan Basin, northern South China Sea

Li²,

et al. 2018

Geological Journal

Self Cite

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Central canyons are considered to be important conduits for the transfer of sediment to the abyssal plains. High‐resolution 3D seismic data and logging data from the east of Lingshui Depression are used to investigate the depositional elements, patterns, and filling processes of central canyon in the Qiongdongnan Basin, northern South China Sea. The Central Canyon in this segment is 30 km wide and more than 1,000 m deep. It was found to be characterized by being subparallel to the continental shelf. In this study, 6 types of deep‐water gravity flow depositional elements were identified, including erosion surfaces, basal lags, turbidite channel complexes, mass transport deposits, lobe complex, and pelagic deposits. Each type of these depositional elements was found to have distinct external features, internal structures, and lateral characteristics in the seismic profiles. Meanwhile, these different assemblages of depositional elements could be composed of 5 depositional units. And in a vertical direction, the evolutionary history could be divided into 5 stages as follows: (a) a repeated cut and fill stage; (b) high net‐to‐gross channel complex dominated stage; (c) low high net‐to‐gross channel and pelagic shale dominated stage; (d) lobe complex deposition stage; and (e) mass transport deposit dominated stage. During Stage 3, the development of small‐scale turbidite channels is the indicators of northern sediment supply. During Stage 4, 7 lobes have been identified in the lobe complexes. The evolution and depositional processes in the study area were most likely controlled by the negative relief induced by the palaeo‐seafloor morphology, as well as the structural inversions of the Red River Fault and the basement faults. Additionally, the sediment supply, sea‐level fluctuations, and tectonic activities also controlled and influenced the depositional processes, along with the internal architecture of the canyon. The results of this study have potentially important implications for the improved understanding the vertical evolution of submarine canyons and also shed a new light on the reservoir potential of the Lingshui section of the Central Canyon.

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Submarine‐channel meandering reset by landslide filling, Taranaki Basin, New Zealand

Covault,

Sylvester,

Dunlap

2024

The Depositional Record

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Landslides are among the largest mass movements on Earth. As such, the deposits of landslides, also known as mass‐transport deposits, are significant architectural elements of continental margins, especially those receiving sediment from large deltas. Landslide dams have been shown to alter the courses of rivers and submarine channels. However, there are fewer examples of landslides completely filling submarine channels and examples of the subsequent stratigraphic evolution. A three‐dimensional seismic‐reflection dataset (<90 Hz) from the deep‐water (>1500 m) Taranaki Basin, offshore the North Island of New Zealand, was used to explore the response of a sequence of channel deposits to landslide filling. The basal channel system initially meandered like a river, with successive channel positions in close proximity, as it aggraded >250 ms two‐way travel time. This systematic, organised evolution is governed by the memory of early channel evolution, which sets the sea floor geomorphology that guides channel‐forming turbidity currents. Later, a channel approximately twice as wide as underlying channels cut off a number of channel bends, probably as a result of an increase in the discharge of channel‐forming turbidity currents. This last channel was filled with submarine landslides, which transported and deposited sediment as debris flows based on the presence of blocks within a matrix comprising chaotic, lower amplitude seismic facies. These debris‐flow deposits smoothed over the sea floor, effectively wiping the memory of channel evolution. As a result, the subsequent channel pattern bears no resemblance to the basal system. Submarine‐channel resetting by landslide filling is common in settings with frequent catastrophic basin‐margin collapses, like offshore New Zealand.

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Detection of a deep-water channel in 3D seismic data using the sweetness attribute and seismic geomorphology: a case study from the Taranaki Basin, New Zealand

Cited by 29 publications

References 22 publications

Seismic Attribute Analyses and Attenuation Applications for Detecting Gas Hydrate Presence

Seismic Attribute Analyses and Attenuation Applications for Detecting Gas Hydrate Presence

The Central Canyon depositional patterns and filling process in east of Lingshui Depression, Qiongdongnan Basin, northern South China Sea

Submarine‐channel meandering reset by landslide filling, Taranaki Basin, New Zealand

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