准噶尔盆地南缘井筒堵塞物中沥青质分子组成研究

李二庭; 靳军; 陈亮; 鲁锋; 史权; 吴建勋; 迪丽达尔·肉孜; 张宇

doi:10.11781/sysydz202202306

准噶尔盆地南缘井筒堵塞物中沥青质分子组成研究

doi: 10.11781/sysydz202202306

李二庭^{1, 2,},
靳军^{1, 2},
陈亮³,
鲁锋^{1, 2},
史权⁴,
吴建勋⁴,
迪丽达尔·肉孜^{1, 2},
张宇^{1, 2}

1.
新疆砾岩油藏实验室, 新疆克拉玛依 834000
2.
中国石油新疆油田分公司实验检测研究院, 新疆克拉玛依 834000
3.
中国石油新疆油田分公司, 新疆克拉玛依 834000
4.
中国石油大学(北京), 北京 102249

基金项目:

中国石油重大工程技术现场试验项目“准噶尔南缘和玛湖等重点地区优快钻完井技术集成与试验” 2019F-33

详细信息

作者简介:
李二庭(1988—)，男，博士，高级工程师，从事油气地球化学研究工作。E-mail: lierting@petrochina.com.cn

中图分类号: TE135
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- 文章访问数: 304
- HTML全文浏览量: 93
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- 被引次数: 0
出版历程
- 收稿日期: 2021-01-25
- 修回日期: 2022-02-08
- 刊出日期: 2022-03-28

Molecular composition of asphaltene in wellbore blockage on the southern margin of Junggar Basin

LI Erting^{1, 2
,},
JIN Jun^{1, 2},
CHEN Liang³,
LU Feng^{1, 2},
SHI Quan⁴,
WU Jianxun⁴,
ROUZI Dilidaer^{1, 2},
ZHANG Yu^{1, 2}

1.
Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
2.
Research Institute of Experiment and Testing, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
3.
Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
4.
China University of Petroleum(Beijing), Beijing 102249, China

摘要

摘要: 采用傅里叶变换离子回旋共振质谱分析技术，分析了准噶尔盆地南缘高探1井原油及井筒堵塞物抽提物中沥青质化学组成及差异，探讨了沥青质的组成及结构与沥青质沉积关系，对于沥青质聚集理论研究具有重要意义。研究结果显示，高探1井原油及井筒堵塞物抽提物中沥青质分子主要为N₁、N₁O₁、O₁、O₂、O₃和O₄类化合物，但堵塞物抽提物中沥青质缩合度(DBE)明显高于原油中沥青质，具有更多的环烷和芳环结构，且富集O₂、O₃和O₄类化合物，表明地层原油在井筒流动过程中不同组成的沥青质具有一定的选择性。高缩合度沥青质组分优先析出，形成固体母核，其中多氧杂原子具有极强的极性，加速原油中其他沥青质组分的沉淀，从而形成堵塞物。另外，堵塞物抽提物中沥青质分子结构复杂，具有较宽的缩合度分布范围，DBE主要分布在9~30，其分子极性力参数较大，且分布范围宽，因此选取分子极性力参数相近的混合溶剂去除堵塞物较为理想。
- 傅里叶变换离子回旋共振质谱 /
- 沥青质 /
- 井筒堵塞物 /
- 准噶尔盆地
Abstract: Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) was employed to analyze the compositional differences of asphaltene of oil and blockage extracts of well Gaotan 1 on the southern margin of Junggar Basin. The correlation between asphaltene composition and structure and precipitation was discussed, which is important for the research of asphaltene precipitation and accumulation. Results showed that the asphaltene molecules of oil and blockage extracts of well Gaotan 1 are mainly composed of N₁, N₁O₁, O₁, O₂, O₃ and O₄ class species. However, the degree of asphaltene condensation in blockage extract is significantly higher than that in oil, and it is enriched with O₂, O₃ and O₄ class species. It indicates that during the flow of formation crude oil in wellbore, the precipitation of asphaltenes with different compositions has a certain selectivity. Asphaltene components with high condensation degree preferentially precipitate and deposit, forming a solid core. Among them, polyoxo-heteroatom compounds have relative strong polarity, which accelerates the precipitation of other asphaltene components in crude oil to form blockage. Asphaltene in blockage extract has a complex molecular structure and a wide range of condensation degree. The DBE values distribute between 9 and 30. Its molecular polar force parameter is larger and the distribution range is wider. Therefore, it is ideal to select a mixed solvent similar to the polar force parameter of blockage asphaltene to remove blockage.
- Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) /
- asphaltene /
- wellbore blockage /
- Junggar Basin

HTML全文

图 1 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质负离子ESI FT-ICR MS质谱图

Figure 1. Negative-ion ESI FT-ICR MS of asphaltene in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 2 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质负离子ESI FT-ICR MS质谱在m/z 374处局部放大图

Figure 2. Partially enlarged view at m/z 374 of negative-ion ESI FT-ICR MS of asphaltene in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 3 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质化合物类型分布

不同颜色表示不同的分子缩合度(DBE)

Figure 3. Distribution of asphaltene compounds in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 4 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质的N₁类化合物的DBE—碳数分布

点的大小代表化合物相对含量，点越大代表含量越高。

Figure 4. Carbon numbers vs. DBE plots of N₁ class species in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 5 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质N₁O₁类化合物的DBE—碳数分布

点的大小代表化合物相对含量，点越大代表含量越高。

Figure 5. Carbon numbers vs. DBE plots of N₁O₁ class species in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 6 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质O₁类化合物的DBE—碳数分布

点的大小代表化合物相对含量，点越大代表含量越高。

Figure 6. Carbon numbers vs. DBE plots of O₁ class species in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 7 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质O₂类化合物的DBE—碳数分布

点的大小代表化合物相对含量，点越大代表含量越高。

Figure 7. Carbon numbers vs. DBE plots of O₂ class species in crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

图 8 准噶尔盆地高探1井原油及堵塞物抽提物中沥青质不同缩合度N₁、N₁O₁、O₁和O₂类化合物相对丰度

Figure 8. Relative abundance of N₁, N₁O₁, O₁ and O₂ class species with different condensation degrees in asphaltene of crude oil and blockage extracts from well Gaotan 1, Junggar Basin

下载: 全尺寸图片幻灯片

表 1 准噶尔盆地高探1井原油及堵塞物抽提物族组分和有机元素特征

Table 1. Composition and organic element of crude oil and blockage extracts in well Gaotan 1, Junggar Basin

样品	族组分/%				有机元素含量/%
样品	饱和烃	芳烃	非烃	沥青质	C	H	N	O
原油	70.28	14.15	8.02	7.55	86.39	13.89	0.06	0.69
堵塞物抽提物	20.48	5.11	2.36	72.05	87.84	7.65	0.70	3.23

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