苏北盆地江苏油田CO2驱油技术进展及应用

doi:10.13809/j.cnki.cn32-1825/te.2024.01.003

Abstract

Abstract:

CCUS（Carbon capture, Utilization and Storage） technology is of great significance to the green and low-carbon transformation and the realization of the “dual carbon” goal, It includes important strategies like CO₂ enhanced oil recovery（EOR） and sequestration. Jiangsu Oilfield has been focusing on CO₂ EOR to improve recovery rates in the challenging fault block reservoirs of the Subei Basin. The company has developed four unique CO₂ EOR models suitable for these complex reservoirs, featuring techniques like gravity-stable displacement. A notable achievement is the successful pilot of the methods such as “simulated horizontal well” GAGD technology in Hua-26 fault block, which led to the one hundred thousand CCUS project tailored for such reservoirs. According to statistics, Jiangsu Oilfield has injected a total of 30.34×10⁴ t of liquid CO₂, with a cumulative oil increase of 9.83×10⁴ t, realizing a better production increase and economic benefits. These technical researches and tests can provide valuable insights for applying CO₂ EOR in similar complex reservoirs.

Key words: complex fault block, CO₂ displacement mode, gas-assisted gravity drainage（GAGD）, enhanced oil recovery, CO₂ storage

CLC Number:

TE357

Jiandong TANG,Zhilin WANG,Zhengjun GE. CO₂ flooding technology and its application in Jiangsu Oilfield in Subei Basin[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(1): 18-25.

Figures/Tables 10

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序号	类型	吞吐井	措施类型	注入量/t	增产原油/t
1	低产液	桥7平1	CO₂吞吐	3 364	4 307
2	高含水	沙49平1	CO₂吞吐	705	473
3	稠油	周43平11	复合吞吐	气95 t+降黏剂3 t	536
总计				4 167	5 316

CO₂ flooding technology and its application in Jiangsu Oilfield in Subei Basin

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CO2 flooding technology and its application in Jiangsu Oilfield in Subei Basin

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CO₂ flooding technology and its application in Jiangsu Oilfield in Subei Basin