中国南方海相页岩气与华北煤系页岩气储层特征差异分析

发布时间：2018-06-06 15:24

  本文选题：凤冈区 + 沁水盆地　； 参考：《中国矿业》2017年03期

【摘要】：我国海相页岩气的勘探开发已经取得了一定的进展,相比之下,煤系页岩气研究成果较少。本文以贵州凤冈区的海相页岩和沁水盆地的煤系页岩为例,通过干酪根类型、总有机碳含量、矿物组成和孔隙结构等四方面进行储层特性对比,分析海相页岩气储层和煤系页岩气储层差异,查明不同沉积环境下页岩气储层特点,为煤系页岩气的进一步勘探开发奠定基础。研究结果表明两者既有相似又有所区别:海相页岩和煤系页岩干酪根类型存在明显差异,前者以Ⅰ型、Ⅱ型干酪根为主,后者主要为Ⅲ型干酪根;海相页岩总有机碳含量和脆性矿物含量较煤系页岩高;两者均发育有机质孔,且以中孔(2~50nm)为主,低温氮气吸附曲线都为Ⅳ型,但海相页岩孔隙比表面积较高。加之煤系页岩单层厚度薄,连续性差,对煤系页岩气的勘探开发不能完全照搬海相页岩气的开发模式,可以考虑与煤层气、致密砂岩气一起勘探开发,提高资源利用率,实现经济开采。
[Abstract]:The exploration and development of marine shale gas in China has made some progress, but the research results of coal shale gas are less. In this paper, the marine shale in Fenggang area, Guizhou Province, and the coal shale in Qinshui basin are taken as examples. The reservoir characteristics are compared in four aspects: kerogen type, total organic carbon content, mineral composition and pore structure. The difference between marine shale gas reservoir and coal measure shale gas reservoir is analyzed, and the characteristics of shale gas reservoir under different sedimentary environment are identified, which lays a foundation for further exploration and development of coal measure shale gas. The results show that there are similarities and differences between the two types: there are obvious differences between marine shale and coal-measure shale kerogen types, the former is mainly type 鈪，

本文编号：1987149