油气藏评价与开发 ›› 2024, Vol. 14 ›› Issue (6): 975-980.doi: 10.13809/j.cnki.cn32-1825/te.2024.06.020
朱浩楠1,2(), 曹成1,2(), 张烈辉1,2, 赵玉龙1,2, 彭先3, 赵梓寒3, 陈星宇1,2
收稿日期:
2023-09-05
发布日期:
2024-12-10
出版日期:
2024-12-26
通讯作者:
曹成
E-mail:1025771222@qq.com;caochengcn@163.com
作者简介:
朱浩楠(2001—),男,在读硕士研究生,从事碳捕集、利用与封存(CCUS)等研究。地址:四川省成都市新都区新都大道8号,邮政编码:610500。E-mail: 1025771222@qq.com
基金资助:
ZHU Haonan1,2(), CAO Cheng1,2(), ZHANG Liehui1,2, ZHAO Yulong1,2, PENG Xian3, ZHAO Zihan3, CHEN Xingyu1,2
Received:
2023-09-05
Online:
2024-12-10
Published:
2024-12-26
Contact:
CAO Cheng
E-mail:1025771222@qq.com;caochengcn@163.com
摘要:
向枯竭气藏内注入CO2,能够同时实现提高采收率与CO2地质封存,在“双碳”背景下具有广阔应用前景。目前,CO2-EGR(CO2驱气提高采收率)总体上尚处于理论研究阶段,针对其机理不明晰的问题,综述了不同气藏CO2-EGR机理。对于常规气藏,其作用机理包括压力恢复及驱替作用、重力分异作用、黏度差异辅助驱替作用、溶蚀改造储层作用;对于凝析气藏能够保压开采,还具有降低黏度作用、溶解膨胀作用、萃取解堵作用;对于页岩气藏、煤层气藏、致密气藏,更具备优势吸附置换作用;对于有水气藏,注CO2则能够有效抑制水侵的发生。各提高采收率机理对不同类型气藏的贡献程度也不尽相同。CO2-EGR已在理论层面证明了其可行性,为进一步实现其现场应用,还需在混合气体相态特征、扩散与气体混合机制、提高采收率潜力评价、提高采收率机理表征等方面攻克难关。研究表明:在枯竭气藏中注入CO2,可以恢复地层压力补充地层能量,由于物性差异形成较稳定驱替过程,在多种机理共同作用下实现提高采收率,是一种极具潜力的增产方法。
中图分类号:
ZHU Haonan,CAO Cheng,ZHANG Liehui, et al. Mechanism and development direction of CO2-EGR[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(6): 975-980.
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