Examination of gas hydrate-bearing deep ocean sediments by X-ray Computed Tomography and verification of physical property measurements of sediments

NGHP Expedition 02 JAMSTEC Science Team

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

Physical properties like porosity and density are important parameters for size estimations of fossil fuel reservoir in host sediments and rocks. X-ray CT based imaging and subsequent analysis of the images by using various techniques for estimations of these properties of host rocks and sediments has been attempted. However, most of those techniques tend to be biased and subjective due to complications in image processing. Here we describe a new procedure for estimating porosity and density without processing the XCT images, but using the raw data that are used for producing the images. In this study, large-size cylindrical core samples (up to 150 cm long and 6.6 cm diameter) were imaged in a matter of minutes by using a medical XCT scanner soon after their recovery from seafloor onboard drillship in order to record as realistic as possible condition of hydrate-bearing sediments. Despite some uncertainty in relative volumes of solid, liquid and gas phases at voxel level, the results obtained by this rapid and non-destructive procedure are in good agreement with those obtained by time- and sample-consuming conventional methods of physical property measurements.

原文English
頁(從 - 到)239-248
頁數10
期刊Marine and Petroleum Geology
108
DOIs
出版狀態Published - 2019 十月

All Science Journal Classification (ASJC) codes

  • 海洋學
  • 地球物理
  • 地質學
  • 經濟地質學
  • 地層學

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