A pressure core based characterization of hydrate-bearing sediments in the Ulleung Basin, Sea of Japan (East Sea)

Tae Sup Yun, Changho Lee, Jong-Sub Lee, Jang Jun Bahk, J. Carlos Santamarina

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The physical characteristics of hydrate-bearing sediments sampled by pressure coring from the Ulleung Basin in the Sea of Japan (East Sea) were investigated using an instrumented chamber capable of testing recovered natural sediments that have never left the methane hydrate stability field. The heterogeneous distribution of segregated hydrate veins and lens structures in sediments results in highly variable geophysical and geomechanical properties. The scaled production test was conducted by controlled depressurization of pressure cores while dissociation and gas production were concurrently monitored using various sensors in the instrumented chamber. The hydrate saturation was estimated to be ∼19.5% in the pore space. Data show a sharp reduction in sediment shear and bulk stiffnesses during hydrate dissociation. Relatively fast gas migration was observed, probably along high-conduction planes left behind as hydrate veins dissociated. The spatial distribution of hydrates in sediment was analyzed based on 3-D image processing. The phenomena relevant to the production test and sampling effects during pressure coring are discussed.

Original languageEnglish
Article numberB02204
JournalJournal of Geophysical Research B: Solid Earth
Volume116
Issue number2
DOIs
Publication statusPublished - 2011 Feb 24

Fingerprint

Bearings (structural)
Sea of Japan
Hydrates
hydrates
Sediments
sediments
basin
sediment
veins
pressure effect
chambers
Gases
pore space
dissociation
gas production
image processing
stiffness
Pressure effects
pressure reduction
Methane

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

A pressure core based characterization of hydrate-bearing sediments in the Ulleung Basin, Sea of Japan (East Sea). / Yun, Tae Sup; Lee, Changho; Lee, Jong-Sub; Bahk, Jang Jun; Santamarina, J. Carlos.

In: Journal of Geophysical Research B: Solid Earth, Vol. 116, No. 2, B02204, 24.02.2011.

Research output: Contribution to journalArticle

@article{cdc6460c49f247bd8bb78cee9d9fac94,
title = "A pressure core based characterization of hydrate-bearing sediments in the Ulleung Basin, Sea of Japan (East Sea)",
abstract = "The physical characteristics of hydrate-bearing sediments sampled by pressure coring from the Ulleung Basin in the Sea of Japan (East Sea) were investigated using an instrumented chamber capable of testing recovered natural sediments that have never left the methane hydrate stability field. The heterogeneous distribution of segregated hydrate veins and lens structures in sediments results in highly variable geophysical and geomechanical properties. The scaled production test was conducted by controlled depressurization of pressure cores while dissociation and gas production were concurrently monitored using various sensors in the instrumented chamber. The hydrate saturation was estimated to be ∼19.5{\%} in the pore space. Data show a sharp reduction in sediment shear and bulk stiffnesses during hydrate dissociation. Relatively fast gas migration was observed, probably along high-conduction planes left behind as hydrate veins dissociated. The spatial distribution of hydrates in sediment was analyzed based on 3-D image processing. The phenomena relevant to the production test and sampling effects during pressure coring are discussed.",
author = "Yun, {Tae Sup} and Changho Lee and Jong-Sub Lee and Bahk, {Jang Jun} and Santamarina, {J. Carlos}",
year = "2011",
month = "2",
day = "24",
doi = "10.1029/2010JB007468",
language = "English",
volume = "116",
journal = "Journal of Geophysical Research G: Biogeosciences",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "2",

}

TY - JOUR

T1 - A pressure core based characterization of hydrate-bearing sediments in the Ulleung Basin, Sea of Japan (East Sea)

AU - Yun, Tae Sup

AU - Lee, Changho

AU - Lee, Jong-Sub

AU - Bahk, Jang Jun

AU - Santamarina, J. Carlos

PY - 2011/2/24

Y1 - 2011/2/24

N2 - The physical characteristics of hydrate-bearing sediments sampled by pressure coring from the Ulleung Basin in the Sea of Japan (East Sea) were investigated using an instrumented chamber capable of testing recovered natural sediments that have never left the methane hydrate stability field. The heterogeneous distribution of segregated hydrate veins and lens structures in sediments results in highly variable geophysical and geomechanical properties. The scaled production test was conducted by controlled depressurization of pressure cores while dissociation and gas production were concurrently monitored using various sensors in the instrumented chamber. The hydrate saturation was estimated to be ∼19.5% in the pore space. Data show a sharp reduction in sediment shear and bulk stiffnesses during hydrate dissociation. Relatively fast gas migration was observed, probably along high-conduction planes left behind as hydrate veins dissociated. The spatial distribution of hydrates in sediment was analyzed based on 3-D image processing. The phenomena relevant to the production test and sampling effects during pressure coring are discussed.

AB - The physical characteristics of hydrate-bearing sediments sampled by pressure coring from the Ulleung Basin in the Sea of Japan (East Sea) were investigated using an instrumented chamber capable of testing recovered natural sediments that have never left the methane hydrate stability field. The heterogeneous distribution of segregated hydrate veins and lens structures in sediments results in highly variable geophysical and geomechanical properties. The scaled production test was conducted by controlled depressurization of pressure cores while dissociation and gas production were concurrently monitored using various sensors in the instrumented chamber. The hydrate saturation was estimated to be ∼19.5% in the pore space. Data show a sharp reduction in sediment shear and bulk stiffnesses during hydrate dissociation. Relatively fast gas migration was observed, probably along high-conduction planes left behind as hydrate veins dissociated. The spatial distribution of hydrates in sediment was analyzed based on 3-D image processing. The phenomena relevant to the production test and sampling effects during pressure coring are discussed.

UR - http://www.scopus.com/inward/record.url?scp=79951798739&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79951798739&partnerID=8YFLogxK

U2 - 10.1029/2010JB007468

DO - 10.1029/2010JB007468

M3 - Article

AN - SCOPUS:79951798739

VL - 116

JO - Journal of Geophysical Research G: Biogeosciences

JF - Journal of Geophysical Research G: Biogeosciences

SN - 0148-0227

IS - 2

M1 - B02204

ER -