吉木萨尔凹陷芦草沟组致密油分子尺寸及结构特征

唐红娇; 杨立辉; 朱峰; 安科; 龙新满; 张自新

doi:10.3799/dqkx.2017.560

Volume 43 Issue 5

May 2018

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Article Navigation > Earth Science > 2018 > 43(5): 1587-1593

Tang Hongjiao, Yang Lihui, Zhu Feng, An Ke, Long Xinman, Zhang Zixin, 2018. Molecular Size and Structure Characteristics of Tight Oil of Lucaogou Formation in Jimusar Depression. Earth Science, 43(5): 1587-1593. doi: 10.3799/dqkx.2017.560

Citation:

Tang Hongjiao, Yang Lihui, Zhu Feng, An Ke, Long Xinman, Zhang Zixin, 2018. Molecular Size and Structure Characteristics of Tight Oil of Lucaogou Formation in Jimusar Depression. Earth Science, 43(5): 1587-1593. doi: 10.3799/dqkx.2017.560

Citation:

Tang Hongjiao, Yang Lihui, Zhu Feng, An Ke, Long Xinman, Zhang Zixin, 2018. Molecular Size and Structure Characteristics of Tight Oil of Lucaogou Formation in Jimusar Depression. Earth Science, 43(5): 1587-1593. doi: 10.3799/dqkx.2017.560

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Molecular Size and Structure Characteristics of Tight Oil of Lucaogou Formation in Jimusar Depression

doi: 10.3799/dqkx.2017.560

Tang Hongjiao^{1,2
,},
Yang Lihui³,
Zhu Feng⁴,
An Ke^1,2,
Long Xinman^1,2,
Zhang Zixin^1,2

1.
Research Institute of Exploration and Development, Xinjiang Oilfield Company, CNPC, Karamay 834000, China
2.
Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, China
3.
Xinjiang Petroleum Engineering Co. Ltd., Karamay 834000, China
4.
Downhole Operation Company, Xibu Drilling Engineering Company Limited, CNPC, Karamay 834000, China

Received Date: 2017-09-20
Publish Date: 2018-05-15

Abstract

Abstract

The study of the size and fluidity of tight oil is of great significance for the evaluation and development of tight reservoirs. In order to determine the molecular size and its influence on mobility of tight oil of Lucaogou Formation in Jimusar depression, the average structure parameters of different fractions of Ji 174 tight oil were calculated on the basis of ¹H-NMR, IR, elemental analysis and molecular weight measurement. According to the parameters, the molecular structures of several fractions from Ji 174 tight oil were simulated by using the Chemoffice software. The results show that the components of the tight oil are mainly concentrated in the fraction from 350 to 500℃, and there are polycyclic naphthene and polycyclic aromatic structures in the average molecules with the sizes of 1.232-4.026 nm. It is the large molecular scale that leads to high shares of oil molecules in nano-pore-throat and affects the pore throat flow limit of the reservoir.
- Jimusar depression,
- Lucaogou Formation,
- tight oil,
- molecular dimension,
- molecular structure,
- petroleum geology

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References(21)

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