茂名盆地油柑窝组褐煤微观孔隙结构特征与分形特征
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摘要
以广东茂名盆地油柑窝组褐煤为研究对象,利用高压压汞、扫描电镜等实验技术手段,探究褐煤微观储集空间的发育特征。结果表明:茂名盆地油柑窝组褐煤TOC(%)介于40.8%~67.4%之间,Ro介于0.37%~0.43%之间,成熟度较低;孔隙度介于12%~24%之间,孔隙以中孔、过渡孔为主;样品表面特征复杂,微米级孔隙、微裂隙较为发育;分形维数介于2.80~2.91之间,样品微观储集空间发育结构复杂,非均质性极强。
Using the lignite samples of Youganwo Formation in Maoming Basin,Guangdong,the developmental characteristics of the micro reservoir space were explored using methods including Mercury intrusion porosimetry and Scanning Electronic Microscopy. Experimental results show that the lignite TOC( %) is between 40. 8% ~ 67. 4%,Ro is between 0. 37% ~ 0. 43%. The porosity is between12% ~ 24%. The mesopores and transition pores is the major type of pores in reservoir. The surface features of the samples are complex,and the micro pores and micro fractures are developed well. The fractal dimension is between 2. 80 ~ 2. 91. The spatial structure of samples is complex and show strong heterogeneity characteristics.
Using the lignite samples of Youganwo Formation in Maoming Basin,Guangdong,the developmental characteristics of the micro reservoir space were explored using methods including Mercury intrusion porosimetry and Scanning Electronic Microscopy. Experimental results show that the lignite TOC( %) is between 40. 8% ~ 67. 4%,Ro is between 0. 37% ~ 0. 43%. The porosity is between12% ~ 24%. The mesopores and transition pores is the major type of pores in reservoir. The surface features of the samples are complex,and the micro pores and micro fractures are developed well. The fractal dimension is between 2. 80 ~ 2. 91. The spatial structure of samples is complex and show strong heterogeneity characteristics.
引文
[1]郭敏.茂名盆地油页岩特征及控矿因素[D].长春:吉林大学,2007.
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[3]陈会军,刘招君,朱建伟,等.相似类比面积丰度法估算油页岩资源潜力——以茂名盆地为例[J].中国地质,2012(5):1 427-1 435.
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[5]杨继涛,陈延蕤,秦匡宗.茂名油页岩中有机质与矿物质热分解过程的研究[J].燃料化学学报,1984(4):332-339.
[6]赵迪斐,郭英海,解徳录,等.基于低温氮吸附实验的页岩储层孔隙分形特征[J].东北石油大学学报,2014(6):100-108.
[7]安士凯,桑树勋,李仰民,等.沁水盆地南部高煤级煤储层孔隙分形特征[J].中国煤炭地质,2011(2):17-21.
[8]傅雪海,秦勇,薛秀谦,等.煤储层孔、裂隙系统分形研究[J].中国矿业大学学报,2001(3):11-14.
[9]姜文,唐书恒,张静平,等.基于压汞分形的高变质石煤孔渗特征分析[J].煤田地质与勘探,2013(4):9-13.
[2]郭敏,周明文,李瑞,等.广东茂名盆地油页岩成矿因素分析[J].华南地质与矿产,2009(2):47-51.
[3]陈会军,刘招君,朱建伟,等.相似类比面积丰度法估算油页岩资源潜力——以茂名盆地为例[J].中国地质,2012(5):1 427-1 435.
[4]李殿超,朱建伟,严焕榕,等.广东省茂名盆地油页岩的沉积特征及分布规律[J].吉林大学学报:地球科学版,2006(6):938-943.
[5]杨继涛,陈延蕤,秦匡宗.茂名油页岩中有机质与矿物质热分解过程的研究[J].燃料化学学报,1984(4):332-339.
[6]赵迪斐,郭英海,解徳录,等.基于低温氮吸附实验的页岩储层孔隙分形特征[J].东北石油大学学报,2014(6):100-108.
[7]安士凯,桑树勋,李仰民,等.沁水盆地南部高煤级煤储层孔隙分形特征[J].中国煤炭地质,2011(2):17-21.
[8]傅雪海,秦勇,薛秀谦,等.煤储层孔、裂隙系统分形研究[J].中国矿业大学学报,2001(3):11-14.
[9]姜文,唐书恒,张静平,等.基于压汞分形的高变质石煤孔渗特征分析[J].煤田地质与勘探,2013(4):9-13.