Performance evaluation and applicability study of gas-phase tracers for CO<sub>2</sub> flooding in low-permeability oil reservoirs

LI YING; WANG LIFEI; ZHANG NAN; LI HAITAO; LUO HONGWEN; WEI CAO; JIANG BEIBEI; MA QIRUI; GUO XIAOQIANG; ZHANG JIANFENG

doi:10.13809/j.cnki.cn32-1825/te.20260072

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Performance evaluation and applicability study of gas-phase tracers for CO₂ flooding in low-permeability oil reservoirs

更新时间：2026-07-23

- Performance evaluation and applicability study of gas-phase tracers for CO₂ flooding in low-permeability oil reservoirs
- Petroleum Reservoir Evaluation and Development Pages: 1-9(2026)
- 作者机构：
  
  1.西南石油大学油气藏地质及开发工程全国重点实验室，四川成都 610500
  2.河北工业大学，天津 300401
  3.中国石化西南油气分公司，四川成都 610000
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.20260072
  CLC： TE357
- Received：12 March 2026，
  
  Online First：23 July 2026，
- 稿件说明：
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李颖, 王利妃, 张楠, 等. 低渗油藏CO₂驱气相示踪剂性能评价与适用性研究[J]. 油气藏评价与开发, XXXX, XX(XX): 1-9. DOI: 10.13809/j.cnki.cn32-1825/te.20260072.

Li Ying, Wang Lifei, Zhang Nan, et al. Performance evaluation and applicability study of gas-phase tracers for CO₂ flooding in low-permeability oil reservoirs[J]. Petroleum Reservoir Evaluation and Development, XXXX, XX(XX): 1-9. DOI: 10.13809/j.cnki.cn32-1825/te.20260072.
李颖, 王利妃, 张楠, 等. 低渗油藏CO₂驱气相示踪剂性能评价与适用性研究[J]. 油气藏评价与开发, XXXX, XX(XX): 1-9. DOI: 10.13809/j.cnki.cn32-1825/te.20260072. DOI：

Li Ying, Wang Lifei, Zhang Nan, et al. Performance evaluation and applicability study of gas-phase tracers for CO₂ flooding in low-permeability oil reservoirs[J]. Petroleum Reservoir Evaluation and Development, XXXX, XX(XX): 1-9. DOI: 10.13809/j.cnki.cn32-1825/te.20260072. DOI：

摘要

针对低渗透油藏CO

驱过程中气窜识别困难、传统气体示踪剂全球增温潜势高、环境负荷大的问题，本文开展气相示踪剂性能评价与适用性研究，旨在为矿场气窜动态监测提供低碳、绿色的替代示踪介质，以满足大区块多井组联合监测的现场需求。选取SF

、C

及C

四种气相示踪剂，开展静态留存实验与动态驱替实验。研究表明：①四种气相示踪剂在实验温压范围内均具有良好的稳定性，非极性示踪剂C

、C

在全区间留存率稳定在90%以上，极性示踪剂C

的留存率亦保持在87%以上。②四种示踪剂的动态产出特征在不同类型岩心中呈现出明确的运移等效性与功能差异性。在高渗岩心中，各示踪剂响应曲线高度趋同，突破时间相对差异小于5%，均对优势渗流通道响应灵敏，表现出宽平顶段塞特征；而在低渗岩心与裂缝性岩心中，示踪剂因分子极性不同而表现出差异化运移规律，非极性C

、C

随气体推进较快、突破时间较早，极性C

则由于存在相间分配与吸附作用，导致其在低渗基质中的产出前缘明显滞后，并在裂缝性岩心次峰中表现出峰值摩尔分数较低的特征。四种示踪剂均具备良好的矿场监测可行性，可为现场示踪剂优选提供更丰富的选择。其中，C

与C

可作为传统SF

的环保替代方案，适用于优势渗流通道的稳定表征；对流体环境具有灵敏迟滞响应的极性C

更适用于基质波及特征的差异化评价。

Abstract

To address the difficulties in identifying gas channeling during CO

flooding in low-permeability oil reservoirs and the high global warming potential and environmental burden of conventional gas tracers

this study evaluates the performance and applicability of gas-phase tracers. The objective is to provide low-carbon and environmentally friendly alternative tracer media for dynamic field monitoring of gas channeling and to meet the field requirements of coordinated monitoring across large reservoir blocks and multiple well groups. Four gas-phase tracers

namely SF

and C

were selected for static retention experiments and dynamic displacement experiments. The results show that: ①All four gas-phase tracers exhibit good stability within the experimental temperature and pressure ranges. The retention rates of the non-polar tracers C

and C

remain above 90% throughout the tested range

while the retention rate of the polar tracer C

remains above 87%. ②The dynamic production characteristics of the four tracers exhibit clear transport equivalence and functional differentiation in different types of cores. In high-permeability cores

the tracer response curves are highly consistent

with relative differences in breakthrough time of less than 5%. All tracers respond sensitively to preferential flow channels and exhibit broad

flat-topped slug characteristics. In contrast

in low-permeability and fractured cores

the tracers show differentiated

transport behaviors due to differences in molecular polarity. The non-polar tracers C

and C

migrate more rapidly with the gas phase and break through earlier

whereas the polar tracer C

shows a significantly delayed production front in the low-permeability matrix because of interphase partitioning and adsorption

and exhibits a lower secondary-peak mole fraction in fractured cores. All four tracers demonstrate good feasibility for field monitoring and can provide a wider range of options for field tracer selection. Among them

and C

can serve as environmentally friendly alternatives to conventional SF

and are suitable for reliable characterization of preferential flow channels

whereas the polar tracer C

which exhibits a sensitive transport-retardation response to the fluid environment

is more suitable for differential evaluation of matrix sweep characteristics.

关键词

Keywords

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Performance evaluation and applicability study of gas-phase tracers for CO2 flooding in low-permeability oil reservoirs

DOI：10.13809/j.cnki.cn32-1825/te.20260072

摘要

Abstract

关键词

Keywords

references

Performance evaluation and applicability study of gas-phase tracers for CO₂ flooding in low-permeability oil reservoirs