Study on factors affecting minimum miscibility pressure of CO<sub>2</sub> flooding by tie-line analysis

Yang Guangyu; Tang Yong; Li Zhaoguo; Zhang Yongqiang; Yu Guangming

doi:10.13809/j.cnki.cn32-1825/te.2019.03.006

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Study on factors affecting minimum miscibility pressure of CO₂ flooding by tie-line analysis
Vol. 9, Issue 3, Pages: 32-35(2019)
Published：2019
DOI： 10.13809/j.cnki.cn32-1825/te.2019.03.006
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DOI：

Yang Guangyu, Tang Yong, Li Zhaoguo, et al. Study on factors affecting minimum miscibility pressure of CO₂ flooding by tie-line analysis[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(3): 32-35. DOI： 10.13809/j.cnki.cn32-1825/te.2019.03.006.

摘要

原油组分和油藏温度对CO

驱最小混相压力影响规律对于注气油藏筛选和评价具有重要意义。系线法是一种使用解析方式计算最小混相压力的方法

速度快

精确度高

操作方便。建立了系线法模拟油藏CO

驱最小混相压力计算流程

研究了原油中C

、C

和C

组分及温度对最小混相压力的影响规律。结果显示：系线分析法与细管数值模拟结果相近。随温度升高混相压力增加

高温时组分含量对最小混相压力敏感性更强;最小混相压力随着原油中C

、C

组分含量增加而减小

随C

含量的增加而增大。该研究为注气最小混相压力计算及影响因素评价提供了一种流程简单、计算准确的新方法。

Abstract

The minimum miscibility pressure（MMP） of CO

flooding is affected by crude oil components and reservoir temperature. And its influence rule has great significance to screen and evaluate gas injection reservoirs. The tie-line analysis is a method to calculate MMP analytical approach which is faster

more accurate

and easier to operate. In this paper

a calculation process of simulating CO

flooding by tie-line analysis was proposed

and the influence law of components（C

） and temperature on MMP was studied. The results showed that the simulation results of the tie-line analysis

were similar to those of the slim tube numerical simulation. The MMP increased with the increase of temperature

and the sensitivity of MMP for each component was more obvious in higher temperature. The MMP decreased with the increase of C

and C

components

but increased with the increase of C

component. The study proposed a new method with simple process and accurate calculation for calculating MMP and evaluating influencing factors.

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Study on factors affecting minimum miscibility pressure of CO2 flooding by tie-line analysis

DOI： 10.13809/j.cnki.cn32-1825/te.2019.03.006

摘要

Abstract

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Keywords

references

Study on factors affecting minimum miscibility pressure of CO₂ flooding by tie-line analysis