Depositional environments and characteristics of grain size and pore-throat size distributions of CO<sub>2</sub> storage aquifer as a controlling factor of injectivity: a case study of the Nagaoka site, Japan

DOI Web Site Web Site 25 References Open Access
  • Ito Takuma
    Research Institute of Innovative Technology for the Earth
  • Nakajima Takahiro
    Research Institute of Innovative Technology for the Earth
  • Xue Ziqiu
    Research Institute of Innovative Technology for the Earth

Bibliographic Information

Other Title
  • CO<sub>2</sub> 地中貯留層の堆積環境と圧入性支配要因としての粒度組成·間隙径分布の特徴:長岡サイトの例
  • CO₂地中貯留層の堆積環境と圧入性支配要因としての粒度組成・間隙径分布の特徴 : 長岡サイトの例
  • CO ₂ チチュウ チョリュウソウ ノ タイセキ カンキョウ ト アツニュウセイ シハイ ヨウイン ト シテ ノ リュウド ソセイ ・ カンゲキケイ ブンプ ノ トクチョウ : ナガオカ サイト ノ レイ

Search this article

Description

<p>We revealed detailed depositional environments and a controlling factor of CO2 injectivitiy in terms of grain-size and pore-throat size distributions of the CO2 storage aquifer of the Nagaoka CO2 storage site, Japan. The target reservoir rock consists of six sedimentary facies, which is interpreted as prodelta to deltafront deposits. The high injectivity zones correspond to the distributary mouth bar deposits in a deltafront (Facies 3), whereas the low injectivitiy zones correspond to the distributary mouth channel deposits in a deltafront (Facies 2) and prodelta deposits (Facies 5). On the basis of scatter plots of median size versus sorting value of grain-size distributions, Facies 3 is characterized by well-sorted coarser grains. Moreover, pore-throat size distribution of Facies 3 shows larger pore than about 10 phi, indicating a high-permeability networks, whereas those of Facies 2 and 5 show dominant smaller pore-throat sizes. These grain-size and pore-throat features associated with depositional environments appear to be a controlling factor of CO2 injectivity.</p>

Journal

References(25)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top