页岩油储层微纳米孔隙小角中子散射实验研究
Experimental study on small angle neutron scattering of Micronano pores in shale oil reservoir
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- 引用格式:
-
王国栋,沈,瑞,柯于斌,郭和坤,余,昊.页岩油储层微纳米孔隙小角中子散射实验研究[J].天然气与石油,2023,41(1):59-67.doi:10.3969/j.issn.1006-5539.2023.01.008
WANG Guodong, SHEN Rui, KE Yubin, GUO Hekun, YU Hao.Experimental study on small angle neutron scattering of Micronano pores in shale oil reservoir[J].Natural Gas and Oil,2023,41(1):59-67.doi:10.3969/j.issn.1006-5539.2023.01.008
- DOI:
- 10.3969/j.issn.1006-5539.2023.01.008
- 作者:
- 王国栋1,2,3 沈 瑞2,3 柯于斌4 郭和坤2,3 余 昊1,2,3
WANG Guodong1,2,3, SHEN Rui2,3, KE Yubin4, GUO Hekun2,3, YU Hao1,2,3
- 作者单位:
- 1. 中国科学院大学工程科学学院, 北京 100049; 2. 中国科学院渗流流体力学研究所, 河北 廊坊 065007; 3. 中国石油勘探开发研究院, 北京 100083; 4. 中国散裂中子源, 广东 东莞 523803
1. School of Engineer Science, University of Chinese Academy of Sciences, Beijing, 100049, China; 2. Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang, Hebei, 065007, China; 3. Research Institute of Petroleum Exploration & Development, PetroChina Company Limited, Beijing, 100083, China; 4. China Spallation Neutron Source, Dongguan, Guangdong, 523803, China
- 关键词:
- 小角中子散射;高压压汞;闭孔:孔径分布;孔隙度
Small angle neutron scattering; High pressure mercury injection; Closed pore; Pore size distribution; Porosity
- 摘要:
- 随着页岩孔隙结构测量技术的发展,页岩孔喉结构测量也更加准确以及定量化。为明确中国不同类型页岩油储层纳米级孔隙分布特征,确定了不同层理方向取样对小角散射结果的影响,并提出结合小角中子散射技术及高压压汞法进行全尺度孔径表征方法,进一步研究不同地区闭孔率及孔径分布特征。结果表明,垂直于样品层理取样切片所测的页岩孔隙度一般大于平行于页岩样品层理取样所测的页岩孔隙度;小角中子散射能测量孔径在1~100 nm左右的孔径分布特征,且结合压汞法能很好地进行全尺度孔径表征。所研究三个地区按样品闭孔率大小排序依次为:鄂尔多斯盆地长7段(L组及C67)、大港岐口凹陷沙三段(F390)、松辽盆地青山口组(Q1);三个地区孔径分布特征差异明显,以下降型和波浪形为主。小角中子散射技术结合高压压汞法进行全尺度孔径表征方法对研究孔隙结构具有借鉴意义。
With the development of shale pore structure measurement technology, the measurement of shale pore throat structure is more accurate and quantitative. In order to clarify the nano scale pore distribution characteristics of different types of shale oil reservoirs in China, the influence of sampling in different bedding directions on small angle scattering results is determined, and a full-scale pore size characterization method based on small angle neutron scattering method and high-pressure mercury injection method is proposed to further study the closed porosity and pore size distribution characteristics in different areas. The results show that the porosity measured by the sampling section perpendicular to the sample bedding is generally greater than that measured by the sampling section parallel to the sample bedding; Small angle neutron scattering can measure the aperture distribution characteristics of the aperture around 1-100 nm, and it can well characterize the full-scale aperture with mercury injection method. The pore closure rates of the samples from the three regions studied are: chang7 formation in Ordos Basin (L section and C67), Dagang Qikou depressed sand section (F39-0) and Qingshankou Formation in Songliao Basin (Q1). There are obvious differences in pore size distribution characteristics in three regions, mainly in descending and wavy shapes. The small angle neutron scattering method combined with high pressure mercury injection method is of great significance to the study of pore structure.
