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PCCT measurements of the consolidation characteristics, constrained modulus and compressional wave velocity for fine-grained sediment collected from Area C, Krishna-Godavari Basin during India's National Gas Hydrate Program, NGHP-02

Dates

Publication Date
Time Period
2015-07-03

Citation

Jang, J., Dai, S., Yoneda, J., Waite, W.F., Collett T.S., and Kumar, P., 2018, Pressure core characterization tool measurements of compressibility, permeability, and shear strength of fine-grained sediment collected from Area C, Krishna-Godavari Basin, during India's National Gas Hydrate Program Expedition NGHP-02: U.S. Geological Survey data release, https://doi.org/10.5066/P91XJ7DP.

Summary

Understanding how effectively methane can be extracted from a gas hydrate reservoir requires knowing how compressible, permeable, and strong the overlying seal sediment is. This data release provides results for flow-through permeability, consolidation, and direct shear measurements made on fine-grained seal sediment from Site NGHP-02-08 offshore eastern India. The sediment was collected in a pressure core from the Krishna-Godavari Basin during the 2015 Indian National Gas Hydrate Program Expedition 2 (NGHP-02). Gas hydrate is a crystalline solid that forms naturally in the sediment of certain marine and permafrost environments where pressure is relatively high (equivalent to the pressure measured ~300 meters water depth or more) and [...]

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Attached Files

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NGHP02_AreaC_Stress_Strain_Modulus_BrowseGraphic.png
“PCCT test showing permeability and shear strength during consolidation testing.”
thumbnail 156.29 KB
NGHP02_AreaC_Stress_Strain_Modulus_Data.csv
“Data in CSV format.”
4.86 KB
NGHP02_AreaC_Stress_Strain_Modulus_Data.xlsx
“Data in XLSX format.”
52.86 KB

Purpose

The purpose of this dataset is to report several different measures of the stiffness of the fine-grained seal sediment collected in pressure core NGHP-02-08-30P. Stiffness information is given in terms of the stress-strain curves measured during consolidation, with the compressional wave velocity (Vp) and with the constrained modulus. In this work, the constrained modulus (M) is calculated from the consolidation data, and from the wave velocity (Mvp).

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