沾化凹陷沙三下亚段成熟泥页岩纳米孔隙体积影响因素分析及意义

发布时间：2018-04-14 18:22

本文选题：纳米孔隙 + 孔隙体积　；参考：《高校地质学报》2017年04期

【摘要】：选取沾化凹陷始新世沙三下亚段(Es_3~下)不同埋深的成熟泥页岩(0.70%~0.93%Ro),并进行去有机质处理,通过对原样和处理样进行热解、XRD和低温氮气吸附法检测分析,以探讨成熟泥页岩纳米孔隙体积的影响因素。结果表明,成熟泥页岩纳米孔隙体积与TOC显示正相关性;去有机质后,有机质变化率和孔隙体积变化率呈正相关性,且去除的有机质含量亦与孔隙体积变化值呈现对应性;孔隙体积与伊/蒙间层、伊利石和石英呈正相关,与方解石负相关。结合已有研究成果,文章认为,成熟泥页岩的纳米孔隙主要为矿物基质孔和有机质-矿物边缘孔,矿物孔主要由伊/蒙间层、伊利石和石英贡献,方解石阻滞矿物孔隙的发育。泥页岩纳米孔隙是页岩油气赋存的主要储集空间,孔隙体积是泥页岩孔隙空间的一个量化参数,其对页岩油气含量的计算以及储量评估意义重大,弄清沾化凹陷沙三下亚段成熟泥页岩纳米孔隙体积的影响因素,可进一步认识处于生油窗的页岩油气的储集空间,为页岩油气的勘探和开发提供依据。
[Abstract]:In Zhanhua sag, Eocene es _ 3s) mature shale with different buried depths, 0.70 and 0.93RoA, were selected and treated with organic matter removal. The samples were tested by pyrolysis XRD and nitrogen adsorption at low temperature, respectively, in Zhanhua Sag.In order to study the influence factors of nanometer pore volume of mature shale.The results show that the nano-pore volume of mature shale has a positive correlation with TOC, the change rate of organic matter and the rate of change of pore volume are positively correlated with the removal of organic matter, and the content of organic matter removed is corresponding to the change value of pore volume.The pore volume is positively correlated with the interlayer, Illite and quartz, and negatively correlated with calcite.Combined with the existing research results, it is considered that the nano-pore of mature shale is mainly composed of mineral matrix pore and organic-mineral marginal pore, and the mineral pore is mainly contributed by the interlayer of Iraq / Mongolia, Illite and quartz, and calcite blocks the development of mineral pore.Shale nano-pore is the main reservoir space for shale oil and gas occurrence, and pore volume is a quantitative parameter of shale pore space, which is of great significance to the calculation of shale oil and gas content and the evaluation of reserves.Understanding the influencing factors of the nanometer pore volume of mature shale shale in the lower member of Sha3 member in Zhanhua depression can further understand the reservoir space of shale oil and gas in the oil generation window and provide the basis for the exploration and development of shale oil and gas.
【作者单位】：同济大学海洋地质国家重点实验室;中国石化胜利油田分公司勘探开发研究院;
【基金】：国家自然科学基金(41372130) 中国博士后科学基金(2016M601650) 国家油气重大专项(2016ZX05006001-003)联合资助
【分类号】：P618.13

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