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页岩油微纳尺度储集空间特征-以东营凹陷利页1井为例 |
Micro- and nanoscale reservoir space of shale from the Es3x to Es4s in Well Liye 1, Dongying Depression |
投稿时间:2018-04-28 修订日期:2018-04-28 |
DOI: |
中文关键词: 页岩油 利页1井 孔隙类型 孔径分布 |
英文关键词: Shale oil Well Liye 1 Pore types Pore radius distribution |
基金项目:国家油气重大专项(2017ZX05013-001);国家自然科学基金(51604053);重庆市基础与前沿研究计划项目(cstc2016jcyjA0126);重庆市教委科学技术研究项目(KJ1601313)。第一 |
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中文摘要: |
非常规油气微-纳米级储集空间研究是一种未来的趋势,加强对非常规油气微观储集空间研究具有重要意义。为了分析页岩油的微观储集空间特征,本文选取利页1井页岩油层段Es3x和Es4s两个层段的样品,综合利用场发射扫描电镜与低温氮气等温吸附脱附技术,从定性和定量两个角度系统分析页岩油样品的微观孔隙类型、孔径分布特征及其主控因素。研究表明Es3x和Es4s孔隙类型主要包括粒间孔、粒间微缝、溶蚀孔、晶间孔、晶内孔;储层孔隙主要为纳米级孔隙,孔径分布区间为1.6~46.0nm,峰值集中在3.0~6.0nm。比表面积与深度总体呈正相关性;目标层段3600~3800m处粘土矿物演化为纳米级孔隙的保存提供了有利条件。 |
英文摘要: |
The study of micro- and nanoscale pore-throat structure of unconventional reservoirs is a trend in the future, and it is of great significance to strengthen this study. This paper selects samples from Es3x and Es4s of the Liye 1 well for analyzing micro- and nanoscale pore-throat structure characteristics. The types, radius and influencing factor of pores are studied through SEM and Low-temperature Nitrogen Adsorption. The results show that the pore types of Es3x and Es4s mainly include intergranular pores, intergranular microfractures, dissolution pores, intergranular pores, and intracrystalline pores. The pores are mainly nanoscale pores, and the pore diameter distribution range is 1.6-46.0 nm, and the peak concentration is 3.0 ~ 6.0nm. The specific surface area and depth are positively correlated. The evolution of clay minerals at the target level 3600 ~ 3800m provides favorable conditions for the preservation of nanoscale pores. |
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