A unified contact cementation theory for gas hydrate morphology detection and saturation estimation from elastic-wave velocities

Pan, Haojie; Li, Hongbing; Chen, Jingyi; Zhang, Yan; Cai, Shengjuan; Huang, Yu‐Cheng; Zheng, Ying Ren; Zhao, Yi; Deng, Jiushuai

doi:10.1016/j.marpetgeo.2019.104146

Cited by 17 publications

(2 citation statements)

References 58 publications

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“…The geophysical properties of solid structures are largely controlled by their mechanical properties: fabric, stiffness, volume, permeability, porosity, mineralogy [32][33]. For example, there is a correlation between the elastic compressibility and conductivity of the saturated rocks with porosity [34], gas hydration [35][36][37], or hydrate saturation in the clay-rich marine sediments with compressional wave and shear wave velocity [38]. The geometrical properties of specimen (e.g.…”

Section: Introductionmentioning

confidence: 99%

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Lindh

Lemenkova

2021

Nordic Concrete Research

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Marine sediments can be stabilized by ultra high-strength binders: cement, Cement Kiln Dust (CKD) and slag. The properties of the stabilized soil indicate potential to their reuse. This study investigated the performance of the unconfined compressive strength (UCS) in the marine sediments stabilized by binder (cement, CKD, slag), tested by ultrasonic P-waves. Materials include 194 specimens collected from the port of Gothenborg. The experiment was performed in Swedish Geotechnical Institute (SGI). The UCS of specimens stabilized by different ratio of binders (cement, CKD, slag) was tested by resonance frequencies of the elastic P-waves. The significant increase in the UCS (>1500 kPa) was recorded for the highest values of CKD and cement, and low values of slag. The correlation profiles of low water/high binder (LW/HB) cement/slag (40/60%) were controlled by curing time. The slag–cement–CKD simplex tests demonstrated UCS of samples with low/high water content and various binder ratio of cement (kg/m3). The ratio of cement binder and curing time play a critical role in the increase of UCS followed by mechanical properties of specimens and intensity of stress. The highest values exceed 1000 m/s in P-waves. The results shown high accuracy (97%) and non-contacting approach for testing UCS of sediments. Seismic methods can be applied to test the UCS of the stabilized sediments, and also in-situ via seismic CPT, surface testing or cross hole seismic testing.

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Section: Introductionmentioning

confidence: 99%

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Lindh

Lemenkova

2021

Nordic Concrete Research

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“…The Guangzhou Marine Geological Survey conducted the GMGS5 cruise, drilling multiple times in strata with obvious continuous seabed-like bottom-simulating reflectors (BSRs), finding that hydrate-bearing layer thicknesses in different wells range from 4 to 165 metres, presenting significant differences. Due to ongoing research on saturation calculations based on resistivity or acoustic logging, it is difficult to determine the enrichment of hydrates in geological formations (Pan et al, 2020Li et al, 2022Wan et al, 2022;Zhu et al, 2022b;Zhu et al, 2023a). This study is based on K-means clustering and the Adaboost method and provides reliable reservoir classification results.…”

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confidence: 99%

Reservoir classification and log prediction of gas hydrate occurrence in the Qiongdongnan Basin, South China Sea

et al. 2023

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Classifying natural gas hydrate reservoirs effectively and carrying out reservoir classification modelling is crucial, but to date, research on building artificial intelligence-assisted logging curve reservoir classification models is not abundant. As exploration and development have progressed, an increasing number of fine-grained reservoirs are being discovered, and their strong heterogeneity makes correct reservoir classification even more important. Two wells used for detecting hydrates in the Qiongdongnan (QDN) Basin are used to explore the relationship between logging response parameters and reservoir quality, as well as the method of building a logging-based reservoir classification model. Through K-means clustering and Adaboost methods, the K-means method is considered to be able to correspond to the hydrate enrichment degree, while the random forest method can establish an effective reservoir classification model (the recognition accuracy is 95%). In the different categories of reservoirs, the physical properties of the reservoirs are obviously poor, and the corresponding hydrate saturation is also low, which indicates that heterogeneity has indeed affected the enrichment of hydrates in fine-grained reservoirs. This reservoir classification research method can effectively recognize reservoirs.

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Estimation of Gas Hydrate Saturation Regarding the Hydrate Morphology in Hydrate-Bearing Sands in the Qiongdongnan Basin, South China Sea

Wei,

Jinqiang,

Zenggui

et al. 2023

Pure Appl. Geophys.

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A unified contact cementation theory for gas hydrate morphology detection and saturation estimation from elastic-wave velocities

Cited by 17 publications

References 58 publications

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Reservoir classification and log prediction of gas hydrate occurrence in the Qiongdongnan Basin, South China Sea

Estimation of Gas Hydrate Saturation Regarding the Hydrate Morphology in Hydrate-Bearing Sands in the Qiongdongnan Basin, South China Sea

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