Research on enhancing condensate oil production by CO<sub>2</sub> huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield

HE Anle; ZOU Chunmei; CUI Yinan; YAN Jun; ZHANG Hewen; TANG Yong

doi:10.13809/j.cnki.cn32-1825/te.2020.03.004

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Research on enhancing condensate oil production by CO₂ huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield

更新时间：2025-12-11

- Research on enhancing condensate oil production by CO₂ huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield
- Petroleum Reservoir Evaluation and Development Vol. 10, Issue 3, Pages: 28-32(2020)
- 作者机构：
  
  1. 中国石油勘探开发研究院廊坊分院,河北,廊坊,065007
  2. 西南石油大学油气藏地质及开发工程国家重点实验室,四川,成都,610500
  3. 西南石油大学油气藏地质及开发工程国家重点实验室,四川,成都,610500
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2020.03.004
  CLC： TE372
- Published：2020
- 稿件说明：
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HE Anle, ZOU Chunmei, CUI Yinan, et al. Research on enhancing condensate oil production by CO₂ huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2020, 10(3): 28-32.
DOI：

HE Anle, ZOU Chunmei, CUI Yinan, et al. Research on enhancing condensate oil production by CO₂ huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2020, 10(3): 28-32. DOI： 10.13809/j.cnki.cn32-1825/te.2020.03.004.

摘要

让纳若尔A南凝析气藏在正式开发前已发生严重的反凝析

造成凝析油损失严重。探索提高凝析油产量方法对油田下一步开发显得尤为重要。为此

以A南某典型井为例

应用相平衡理论和油藏数值模拟技术

分析了地层流体反凝析规律和凝析油分布特征

研究了CO

吞吐提高气井凝析油产量机理及效果。结果表明

气藏反凝析分为恒质膨胀和定容衰竭2个阶段

凝析油主要聚集在井筒周围30 m内

凝析油饱和度范围22.44 %~29.51 %。CO

提高凝析油产量的机理主要是改变地层流体反凝析规律、降低反凝析界限和蒸发凝析油。但当CO

注入量较少时

蒸发凝析油能力有限。为确保CO

吞吐增油效果

的周期注入量应该超过500×10

。该研究对类似凝析气藏开发中后期提高凝析油产能及解堵具有指导意义。

Abstract

Serious retrograde condensation has occurred before the development of gas cap in South A condensate gas reservoir of Zanarol Oilfield

resulting in serious loss of condensate oil. It is particularly important to explore the method of improving the production of condensate oil for the further development of oilfield. Therefore

taking a typical well in South A gas reservoir as a example

the phase equilibrium theory and numerical simulation are applied to study the retrograde condensation rule of formation fluid and the distribution of condensate oil in formation. On this basis

the mecha

nism and effect of condensate oil enhancement by CO

huff-n-puff are researched. The results show that retrograde condensation in South A gas reservoir has two stages: constant composition expansion（CCE） and constant volume depletion（CVD）. Condensate oil distributes mainly within 30 m of wellbore

and its saturation ranges from 22.44 % to 29.51 %. The mechanism of CO

increasing condensate production is to change the retrograde condensation rule

reduce pressure condition of retrograde condensation

and evaporate condensate oil. However

if the injection volume of CO

is low

the volume of vaporized condensate oil will be small

which limits the effect of EOR. Therefore

the cumulative injection of CO

should be more than 500×10

at a cycle to ensure the effect of CO

huff-n-puff. This study has guiding significance for condensate oil enhancement and plug removal in the middle and later stages of similar condensate gas reservoir development.

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Research on enhancing condensate oil production by CO2 huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield

DOI：10.13809/j.cnki.cn32-1825/te.2020.03.004

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Abstract

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references

Research on enhancing condensate oil production by CO₂ huff-n-puff in South A condensate gas reservoir of Zanarol Oilfield