高含水油藏CO2和伴生气混合驱可行性研究

doi:10.11885/j.issn.1674-5086.2024.06.23.01

西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (3): 88-100.DOI: 10.11885/j.issn.1674-5086.2024.06.23.01

高含水油藏CO₂和伴生气混合驱可行性研究

张铃丰¹, 廖新维¹, 张琦², 董鹏³, 杨泽鹏¹, 侯善泽¹

1. 中国石油大学(北京)石油工程学院, 北京昌平 102249;
2. 中国石油吐哈油田分公司勘探开发研究院, 新疆哈密 839009;
3. 中国海油集团能源经济研究院, 北京东城 100013

收稿日期:2024-06-23 发布日期:2025-07-11
通讯作者: 廖新维，E-mail： xinwei@cup.edu.cn
作者简介:张铃丰，1996年生，男，汉族，四川成都人，博士研究生，主要从事CO₂提高采收率研究。E-mail：2021310134@student.cup.edu.cn
廖新维，1967年生，男，汉族，福建大田人，教授，博士研究生导师，主要从事油气渗流理论及油气田开发研究。E-mail：xinwei@cup.edu.cn
张琦，1994年生，男，汉族，吉林松原人，工程师，主要从事油气田开发技术方向研究。E-mail：49618173@qq.com
董鹏，1994年生，男，汉族，青海海西州人，工程师，博士，主要从事油气田开发与投资估算研究。E-mail：dongpeng4@cnooc.com.cn
杨泽鹏，1999年生，男，汉族，山西大同人，博士研究生，主要从事CO₂提高采收率与地质埋存研究。E-mail：yzp6085060@163.com
侯善泽，1999年生，男，汉族，河北廊坊人，硕士，主要从事油气田开发等方面研究。E-mail：15076658917@163.com
基金资助:
国家自然科学基金（52341401）；北京市自然科学基金面上基金（3232027）

A Feasibility Study of CO₂ and Associated Gas Mixture Flooding in High Water-cut Reservoirs

ZHANG Lingfeng¹, LIAO Xinwei¹, ZHANG Qi², DONG Peng³, YANG Zepeng¹, HOU Shanze¹

1. College of Petroleum Engineering, China University of Petroleum, Changping, Beijing 102249, China;
2. Research Institute of Exploration and Development, Tuha Oilfield Company, PetroChina, Hami, Xinjiang 839009, China;
3. Energy Economics Institute, China National Offshore Oil Corporation, Dongcheng, Beijing 100013, China

Received:2024-06-23 Published:2025-07-11

摘要/Abstract

摘要： 吐哈油田鄯善区块已进入高含水开发后期，水驱进一步提高采收率潜力有限，需探索新的提高采收率技术。CO₂驱油提高采收率的有效性已被国内外研究广泛证实，但鄯善区块缺乏CO₂气源，外购和运输成本高昂。为降低CO₂注气成本，探索将丰富的烃类伴生气与CO₂混合驱油的可行性。利用鄯善区块原油、岩芯和伴生气，测定不同CO₂含量混合气与原油的最小混相压力；开展高温高压条件下岩芯驱油实验，先水驱以模拟高含水开发后期状态，随后注入不同CO₂含量混合气进行气驱，并结合核磁共振和CT扫描进行监测。结果表明，混合气中CO₂含量超过43%即可实现与原油的混相；当CO₂含量约50%时，驱油效果接近纯CO₂驱油，显著优于纯伴生气驱油；CO₂和伴生气混合驱油能够在微观孔隙尺度上有效动用剩余油。由此可见，CO₂和伴生气混合驱油是一种经济可行的替代方案，可为鄯善区块开发后期提供理论支持。

关键词: 高含水, 伴生气, CO₂驱油, 核磁共振, CT扫描

Abstract: The Shanshan Block in the Tuha Oilfield has entered a high-water-cut development stage, limiting additional oil recovery by waterflooding, it is imperative to explore novel EOR technologies. Although CO₂ flooding is proven effective by reseaches home and abord, but it is highly costly for Shanshan Block due to the lack of CO₂ resources. This study examines mixing hydrocarbon-associated gas with CO₂ to reduce injection expenses. Minimum miscibility pressures were tested using crude oil, cores, and associated gas in Shanshan Block. Under high temperature and pressure, cores were waterflooded and then displaced with gas mixtures at varying CO₂ concentrations, tracked by nuclear magnetic resonance and computed tomography. Results show that miscibility occurs above 43% CO₂ content. At approximately 50% CO₂, displacement performance is comparable to pure CO₂ flooding and surpasses pure associated gas, Microscopic analysis reveals that the hybrid CO₂-associated gas flooding effectively mobilizes remaining oil at the pore scale, demonstrating economic feasibility and technical efficacy. Hence, it offers a promising method for Shanshan Block.

Key words: high water-cut, associated gas, CO₂ flooding, NMR, CT scanning

中图分类号:

TE357.7

张铃丰, 廖新维, 张琦, 董鹏, 杨泽鹏, 侯善泽. 高含水油藏CO₂和伴生气混合驱可行性研究[J]. 西南石油大学学报(自然科学版), 2025, 47(3): 88-100.

ZHANG Lingfeng, LIAO Xinwei, ZHANG Qi, DONG Peng, YANG Zepeng, HOU Shanze. A Feasibility Study of CO₂ and Associated Gas Mixture Flooding in High Water-cut Reservoirs[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(3): 88-100.

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高含水油藏CO₂和伴生气混合驱可行性研究

A Feasibility Study of CO₂ and Associated Gas Mixture Flooding in High Water-cut Reservoirs

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