Prediction method of migration law and gas channeling time of CO<sub>2</sub> flooding front: A case study of G89-1 Block in Shengli Oilfield

CUI Chuanzhi; YAN Dawei; YAO Tongyu; WANG Jian; ZHANG Chuanbao; WU Zhongwei

doi:10.13809/j.cnki.cn32-1825/te.2022.05.005

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Prediction method of migration law and gas channeling time of CO₂ flooding front: A case study of G89-1 Block in Shengli Oilfield

更新时间：2025-12-05

- Prediction method of migration law and gas channeling time of CO₂ flooding front: A case study of G89-1 Block in Shengli Oilfield
- Petroleum Reservoir Evaluation and Development Issue 5, Pages: 741-747+763(2022)
- 作者机构：
  
  1. 中国石油大学（华东）石油工程学院,山东青岛 266580中国石化胜利油田分公司勘探开发研究院,山东,东营,257015
  2. 中国石化胜利油田分公司勘探开发研究院,山东,东营,257015
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2022.05.005
  CLC： E357.7
- Published：2022
- 稿件说明：
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CUI Chuanzhi, YAN Dawei, YAO Tongyu, et al. Prediction method of migration law and gas channeling time of CO₂ flooding front: A case study of G89-1 Block in Shengli Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2022, (5): 741-747+763.
DOI：

CUI Chuanzhi, YAN Dawei, YAO Tongyu, et al. Prediction method of migration law and gas channeling time of CO₂ flooding front: A case study of G89-1 Block in Shengli Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2022, (5): 741-747+763. DOI： 10.13809/j.cnki.cn32-1825/te.2022.05.005.

摘要

气窜时机预测对CO

气窜预防与提高采收率具有重要意义

目前的研究很少涉及气窜时机的定量表征。根据目标区块油藏参数

应用数值模拟手段分析了原油黏度、储层渗透率、注气速度、注采井距等因素对CO

驱前缘移动规律的影响

建立了考虑多因素影响的气窜时间及气窜时波及系数表征公式

并通过与矿场实际对比

验证了公式的准确性。研究表明:在定压生产条件下

原油黏度越大

波及系数减小。当原油黏度大于3 mPa·s

见气时间增加幅度减缓;储层渗透率变大时

渗流阻力变小

驱替前缘移动速度加快

油井突破时间越早;当注气速度增加

前缘移动速度加快

见气时间提前

当注气速度为2 500 m~3/d时

波及系数最小;当注采井距增大时

气体前缘移动速度减慢

油井见气时间延长

当注采井距大于240 m时

继续增大井距

波及系数提高幅度较小。

Abstract

gas channeling time prediction is of great significance for CO

gas channeling prevention and enhanced oil recovery. Current studies rarely involve quantitative characterization of the gas channeling time. According to the parameters of the target block reservoir

the crude oil viscosity

reservoir permeability

gas injection rate and injection-production well spacing and other factors impact on the moving rule of the CO

drive front is analyzed by the numerical simulation method

then t

he characterization formula of gas flow time and gas flow influence coefficient considering multiple factors is established

and the accuracy of the formula is verified by comparing with the field practice. The results show that under the condition of constant pressure production

the sweep efficiency decreases with the increase of crude oil viscosity. When the crude oil viscosity is greater than 3 mPa·s

the increase of gas emergence time slows down. When the reservoir permeability increases

the seepage resistance decreases

the displacement front moves faster

and the oil well breaks out earlier. When the gas injection velocity increases

the leading edge movement speed increases and the gas appearance time advances. When the gas injection velocity is 2 500 m

the sweep efficiency is the minimum. When the injection-production well spacing increases

the moving speed of gas front slows down

and the gas emergence time of oil well prolongs. When the injection-production well spacing is larger than 250 m

the well spacing continues to increase

and the sweep efficiency increases slightly.

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Keywords

references

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Prediction method of migration law and gas channeling time of CO2 flooding front: A case study of G89-1 Block in Shengli Oilfield

DOI：10.13809/j.cnki.cn32-1825/te.2022.05.005

摘要

Abstract

关键词

Keywords

references

Prediction method of migration law and gas channeling time of CO₂ flooding front: A case study of G89-1 Block in Shengli Oilfield