石油与天然气地质 ›› 2021, Vol. 42 ›› Issue (6): 1389-1400.doi: 10.11743/ogg20210613
白龙辉1(), 柳波1,*(), 迟亚奥1, 李士超2, 闻迅1
收稿日期:
2021-07-30
出版日期:
2021-12-28
发布日期:
2021-12-16
通讯作者:
柳波
E-mail:bailonghui0302@163.com;liubo@nepu.edu.cn
作者简介:
白龙辉(1994-), 男, 博士研究生, 非常规油气地质。E-mail: 基金资助:
Longhui Bai1(), Bo Liu1,*(), Yaao Chi1, Shichao Li2, Xun Wen1
Received:
2021-07-30
Online:
2021-12-28
Published:
2021-12-16
Contact:
Bo Liu
E-mail:bailonghui0302@163.com;liubo@nepu.edu.cn
摘要:
页岩中已被证明含有大量可供开采的油气资源,厘清页岩中异相流体含量及赋存态对页岩油的开发至关重要。二维核磁共振技术能够对页岩中含氕(1H)化合物进行无损、快速、定量检测。对松辽盆地青山口组一段页岩样品进行抽提前后、自发渗吸以及加热过程中的核磁共振检测,定量评价青一段页岩异相流体含量、赋存状态以及页岩放置时的流体散失。结果表明,在核磁二维谱图上,类固体有机质和轻质烃类主要分布于T1大于10 ms的上方区域,两者间基本以T2=0.1 ms为界,分别与有机碳含量TOC及S1(游离烃)具有良好的线性关系。松辽盆地南部青一段页岩油主要以游离及吸附态赋存,页岩粘土含量越高,吸附态页岩油含量越高,游离态越少。页岩自发渗吸过程中的核磁共振检测结果表明了粘土矿物吸水膨胀作用。在页岩抽真空加热过程中,轻质烃挥发损失的同时水也大量地损失。利用密闭取心样品,结合二维核磁共振技术,可恢复其原始含油饱和度和含水饱和度。
中图分类号:
表1
松辽盆地青山口组一段泥页岩样品有机地化参数以及矿物组分"
样品编号 | 深度/ m | TOC/ % | Tmax/ ℃ | S1/(mg·g-1) | S2/(mg·g-1) | PI | DCM | 矿物组分含量/% | |||||
石英 | 长石 | 方解石 | 白云石 | 黄铁矿+ 菱铁矿 | 粘土 | ||||||||
1 | 1 480.28 | 2.49 | 450 | 1.20 | 21.10 | 0.05 | 0.50 | 31.0 | 18.7 | 0.9 | 3.6 | 8.8 | 37.0 |
2 | 1 486.94 | 2.68 | 449 | 1.50 | 19.20 | 0.07 | 0.72 | 30.2 | 20.2 | 1.5 | 0 | 10.1 | 38.0 |
3 | 1 492.70 | 2.40 | 448 | 1.20 | 17.20 | 0.07 | 0.63 | 31.9 | 16.4 | 0 | 0 | 10.4 | 41.3 |
4 | 1 498.13 | 2.84 | 447 | 2.00 | 20.60 | 0.09 | 0.84 | 33.6 | 23.5 | 1.7 | 0 | 8.0 | 33.2 |
5 | 1 506.95 | 3.49 | 448 | 1.50 | 26.90 | 0.05 | 0.66 | 29.6 | 18.5 | 5.8 | 2.3 | 9.7 | 34.1 |
6 | 1 510.72 | 2.27 | 449 | 1.00 | 22.40 | 0.04 | 0.47 | 32.6 | 17.2 | 0 | 0 | 8.5 | 41.7 |
7 | 1 512.78 | 3.39 | 451 | 1.10 | 30.10 | 0.03 | 0.61 | 63.9 | 10.1 | 0 | 2.1 | 2.9 | 52.6 |
8 | 1 524.64 | 1.81 | 447 | 2.20 | 14.90 | 0.13 | 0.88 | 31.4 | 10.5 | 1.3 | 4.8 | 21.2 | 30.9 |
9 | 1 527.86 | 3.41 | 449 | 1.80 | 25.70 | 0.07 | 0.77 | 39.2 | 10.7 | 0 | 0 | 6.9 | 43.1 |
10 | 2 046.55 | 4.10 | 445 | 4.63 | 25.28 | 0.15 | — | 35.8 | 9.0 | 3.4 | 12.1 | 2.0 | 37.7 |
11 | 2 055.80 | 2.56 | 438 | 2.56 | 16.68 | 0.13 | — | 32.2 | 10.1 | 0 | 2.0 | 9.0 | 46.7 |
表2
2D NMR划分异相1H化合物结果"
样品编号 | 抽提前 | 抽提后 | |||||||||||
样品质量/g | 总化合物量/μL | 类固体有机质含量/(μL·g-1) | 轻质烃含量/(μL·g-1) | 羟基化合物/(μL·g-1) | 水含量/(μL·g-1) | 样品质量/ g | 总化合物量/μL | 类固体含量有机质/(μL·g-1) | 轻质烃含量/(μL·g-1) | 羟基化合物含量/(μL·g-1) | 水含量/(μL·g-1) | ||
1 | 20.62 | 863 | 6.2 | 1.7 | 15.3 | 18.6 | 19.4 | 645 | 4.0 | 1.6 | 20.3 | 7.4 | |
2 | 20.79 | 853 | 5.9 | 2.3 | 15.5 | 17.3 | 19.9 | 653 | 3.3 | 1.3 | 24.5 | 3.7 | |
3 | 20.68 | 987 | 5.0 | 2.2 | 22.4 | 18.1 | 20.0 | 696 | 3.4 | 1.5 | 24.9 | 5.0 | |
4 | 20.98 | 730 | 6.5 | 3.1 | 12.5 | 12.7 | 20.0 | 564 | 1.7 | 1.3 | 20.4 | 4.7 | |
5 | 20.96 | 803 | 7.8 | 2.4 | 13.2 | 14.9 | 20.0 | 602 | 3.1 | 1.3 | 23.7 | 2.2 | |
6 | 20.86 | 871 | 7.4 | 1.9 | 18.5 | 14.1 | 20.0 | 780 | 6.7 | 1.1 | 27.8 | 3.5 | |
7 | 20.50 | 1 006 | 9.1 | 2.2 | 23.1 | 14.7 | 19.7 | 814 | 7.5 | 2.1 | 28.3 | 3.4 | |
8 | 20.41 | 869 | 4.5 | 3.9 | 19.1 | 15.1 | 19.0 | 798 | 1.4 | 2.2 | 33.8 | 4.6 | |
9 | 20.96 | 961 | 7.6 | 3.3 | 17.7 | 17.3 | 19.5 | 723 | 4.3 | 1.4 | 27.9 | 3.4 |
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