Effect of CO<sub>2</sub> flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield

Liu Xiaochun; Li Xiaorong; Yang Feitao; Ma Guowei; Liang Xiaojing

doi:10.13809/j.cnki.cn32-1825/te.2019.03.007

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Effect of CO₂ flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield

更新时间：2025-12-05

- Effect of CO₂ flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield
- Petroleum Reservoir Evaluation and Development Vol. 9, Issue 3, Pages: 36-40(2019)
- 作者机构：
  
  1. 中国石油长庆油田分公司油气工艺研究院,陕西,西安,710018
  2. 中国石油低渗透油气田勘探开发国家工程实验室,陕西,西安,710018
  3. 中国石油长庆油田分公司第五采油厂,陕西,西安,710200
  4. 中国科学院兰州化学物理研究所,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2019.03.007
  CLC： TE357
- Published：2019
- 稿件说明：
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Liu Xiaochun, Li Xiaorong, Yang Feitao, et al. Effect of CO₂ flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(3): 36-40.
DOI：

Liu Xiaochun, Li Xiaorong, Yang Feitao, et al. Effect of CO₂ flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(3): 36-40. DOI： 10.13809/j.cnki.cn32-1825/te.2019.03.007.

摘要

为深入研究CO

驱提高原油采收率方法对原油物性的影响

加深了解CO

驱油机理

为CO

驱现场试验效果分析提供理论依据

针对在长庆姬塬油田黄3区进行的CO

驱提高原油采收率现场试验

采用柱色谱法、气相色谱—质谱联用法等方法对长庆姬塬油田黄3区CO

驱油前后采出原油的物性变化进行了详细研究

重点考察了原油族组分含量、不同碳链烷烃含量、凝点、黏温曲线的变化情况。试验结果表明：注入CO

后

原油烷烃组分先减小后增加

非烃和沥青质组分先增加后减小;原油烷烃组分中轻质烷烃（C

—C

）先减小后增加

重质烷烃（C

—C

）含量先增加后减小;原油凝点先升高后降低

原油黏度低温（35 ℃）略有升高

高温下无明显变化。上述结果符合CO

混相驱油机理

原油物性的变化是由CO

抽提机理和CO

萃取机理共同作用的结果。通过上述研究

为CO

驱油机理的认识提供了数据支撑

为进一步制定提高CO

驱油效率方案提供了一定依据。

Abstract

In order to study the effect of CO

flooding on the physical properties of crude oil

understand the mechanism of CO

flooding

and provide theoretical basis for the analysis of field test results of CO

flooding

the field test of CO

flooding in Huang 3 block of Jiyuan oilfield in Changqing was carried out by column chromatography and gas chromatography-mass spectrometry. The physical properties of crude oil produced before

and after CO

flooding in Huang 3 block of Jiyuan oilfield

Changqing

were studied in detail by means of column chromatography

gas chromatography and mass spectrometry method and other methods. The changes of crude oil group content

different carbon chain alkanes content

solidification point and viscosity-temperature curve were mainly investigated. The experimental results show that after CO

injection

the alkane fraction of crude oil first decreases and then increases

while the non-hydrocarbon and asphaltene fraction first increases and then decreases; the light alkane（C

—C

） in the alkane fraction of crude oil first decreases and then increases

the heavy alkane（C

—C

） content first increases and then decreases; the pour point of crude oil first increases and then decreases

and the viscosity of crude oil at low temperature（35 ℃） increased slightly

but there was no obvious change at high temperature. The above results accord with the mechanism of CO

miscible flooding. The change of crude oil physical properties is the result of the interaction of CO

extraction mechanism. Through the above research

it provides data support for understanding the mechanism of CO

flooding

and provides a certain basis for further formulating plans to improve the efficiency of CO

flooding.

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AI问答

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Effect of CO2 flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield

DOI：10.13809/j.cnki.cn32-1825/te.2019.03.007

摘要

Abstract

关键词

Keywords

references

Effect of CO₂ flooding on physical properties of produced crude oil in Huang 3 block of Changqing Oilfield