湖相、海相泥页岩孔隙分形特征对比

发布时间：2017-12-26 17:18

本文关键词：湖相、海相泥页岩孔隙分形特征对比　出处：《岩性油气藏》2016年01期 　论文类型：期刊论文

【摘要】：在松辽盆地湖相泥页岩低温氮气吸附实验的基础上,利用FHH模型探讨了湖相泥页岩纳米级孔隙结构分形维数与比表面积、平均孔径及TOC含量的关系,进一步对比了湖相与海相泥页岩孔隙分形维数特征。结果表明:1湖相、海相泥页岩纳米级孔隙均具有明显的分形特征,且大孔隙(孔径为5~100 nm)结构复杂,其分形维数高于小孔隙(孔径小于5 nm)。2湖相泥页岩纳米级孔隙结构相对简单,分形维数小于海相泥页岩。3分形维数与TOC含量呈正相关关系,湖相泥页岩有机质丰度对分形维数影响较小。4湖相泥页岩分形维数D_1与平均孔径具有明显的线性关系,表明D_1可以反映湖相泥页岩孔隙结构特征;海相泥页岩分形维数D_2与孔隙比表面积具有明显的指数关系,表明D_2可以反映海相泥页岩孔隙比表面积特征。
[Abstract]:On the basis of Songliao Basin lacustrine shale low temperature nitrogen adsorption experiments, discusses the lacustrine shale nanoscale fractal dimension of pore structure and specific surface area, average pore diameter and TOC content using the FHH model, further comparison of lacustrine and marine shale pore fractal dimension. The results show that: 1, the nanoscale pores of lacustrine and marine shale have obvious fractal characteristics, and the macropores (Kong Jing 5~100 nm) have complex structures, and their fractal dimension is higher than that of small pores (Kong Jing is less than 5 nm). The pore structure of the 2 Lake shale shales is relatively simple, and the fractal dimension is less than the marine shale. There is a positive correlation between the 3 fractal dimension and the content of TOC, and the abundance of organic matter in the shale of lake facies shale has little influence on the fractal dimension. 4 lacustrine shale fractal dimension D_1 and the average pore size has a significant linear relationship, show that D_1 can reflect the lacustrine shale pore structure; marine shale pore fractal dimension D_2 and the index has obvious relationship between specific surface area, show that D_2 can reflect the marine shale pore surface area characteristics.
【作者单位】：中国石油大学(华东)非常规油气与新能源研究院;中国石油大学(华东)地球科学与技术学院;
【基金】：国家自然科学基金项目“页岩的成储机理及页岩油的可流动性研究——以松辽盆地、济阳坳陷为例”(编号:41330313) 青年科学基金项目“生油阶段湖相泥页岩孔隙演化特征及其与页岩油富集关系”(编号:41402110) 国家重大科技专项“高过成熟烃源岩成烃潜力定量评价”(编号:2011ZX05004) 中央高校基本科研业务费专项资金项目“湖相泥页岩孔隙特征及其与页岩油富集关系”(编号:14CX05017A)联合资助
【分类号】：P618.13
【正文快照】： 湖相泥页岩低温氮气吸附实验在北京市理化分析测试中心进行,执行国家标准GB/T 19587—2004,采用的仪器为美国康塔仪器公司的QuantachromeNova 4200e,相关测试数据如表1所列。具体的操作步骤如下:(1)取泥页岩样品(粉碎粒径小于3 mm)10 g装入与吸附仪相连的样品管中,并加热至110

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