高フュージナイト質亜炭における浸透特性と制御要因
Fujing Wang1, Geng Li1,2,3, Wentian Mi1
1School of Resources and Environmental Engineering, Inner Mongolia University of Technology, Hohhot 010051, China.
ACS omega
|December 22, 2025
まとめ
この研究は、亜炭中の不活性inite含有量が貯留層の浸透性に正の影響を与えるのに対し、フュミニット含有量は負の相関があることを明らかにしている。フュージナイトとセミフュージナイトが浸透性の鍵であるが、複雑な細孔構造はフュージナイトリッチ亜炭において高多孔度、低浸透性を引き起こす可能性がある。
科学分野:
- 地質学 石油工学 石炭科学
背景:
- フュージナイトとセミフュージナイトが優勢な不活性initeリッチ石炭は広く分布している。 フュージナイトリッチ亜炭の細孔特性の理解は、石炭貯留層の特性と浸透性の評価に不可欠である。
研究 の 目的:
- Yimin層、ハイラル盆地のフュージナイトリッチ亜炭の細孔構造を調査する。 石炭貯留層の細孔構造と浸透性に対するマセラルの組成の影響を分析する。 これらの特性に影響を与える地質学的制御メカニズムを解明する。
主な方法:
- 核磁気共鳴(NMR)実験 浸透性試験 電子顕微鏡 マセラルの定量
主要な成果:
- Yimin層の亜炭は不活性initeに富む。 多孔度はフュミニット含有量に反比例し、不活性inite含有量に比例する。 フュミニット含有量は移動性水飽和度と浸透性に負の相関があり、不活性inite含有量は正の相関を示す。 フュージナイトとセミフュージナイトが浸透性の変動の主な要因である。 フュージナイトリッチ亜炭は非線形の多孔度-浸透性の関係を示し、一部のサンプルでは複雑な細胞状細孔ネットワークにより高多孔度、低浸透性を示す。
結論:
- マセラルの組成は亜炭の細孔構造と浸透性を著しく制御する。 フュージナイトリッチ亜炭の細孔構造、特にその細胞状の性質は、異常な多孔度-浸透性の挙動を引き起こす可能性がある。 貯留層評価には、効果的な最適化のために高多孔度ゾーンと高浸透性ゾーンを区別する必要がある。
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