特种油气藏 ›› 2023, Vol. 30 ›› Issue (3): 97-105.DOI: 10.3969/j.issn.1006-6535.2023.03.012

• 油藏工程 • 上一篇    下一篇

二甲醚水驱提高稠油油藏采收率实验

张亮1,2, 魏虎超3, 张向峰4, 史振鹏5, 赵泽宗6, 王晓燕7, 章杨7, 杨红斌1,2   

  1. 1.中国石油大学(华东),山东 青岛 266580;
    2.非常规油气开发教育部重点实验室,山东 青岛 266580;
    3.中国石化西北油田分公司,新疆 乌鲁木齐 830011;
    4.中国石化胜利油田分公司,山东 东营 257000;
    5.中国石化炼化工程(集团)股份有限公司,北京 100029;
    6.中国石化中原油田分公司,河南 濮阳 457001;
    7.中国石油大港油田分公司,天津 300270
  • 收稿日期:2022-07-23 修回日期:2023-04-25 出版日期:2023-06-25 发布日期:2023-07-13
  • 作者简介:张亮(1983—),男,副教授、硕士生导师,2006年毕业于中国石油大学(华东)船舶与海洋工程专业,2011年毕业于该校石油工程专业,获博士学位,现主要从事提高采收率与非常规油气开采、新能源开发与CO2资源化利用、井筒流动安全及地面配套工艺研究。
  • 基金资助:
    大港油田科技攻关项目“CO2对原油高压物性影响测试及物模驱油试验分析”(DGYT-2019-CL-515)

Experiment of DME Water Flooding Enhanced Recovery of Heavy Oil Reservoirs

Zhang Liang1,2, Wei Huchao3, Zhang Xiangfeng4, Shi Zhenpeng5, Zhao Zezong6, Wang Xiaoyan7, Zhang Yang7, Yang Hongbin1,2   

  1. 1. China University of Petroleum (East China), Qingdao, Shandong 266580, China;
    2. Key Laboratory of Unconventional Oil and Gas Development, Ministry of Education, Qingdao, Shandong 266580, China;
    3. Sinopec Northwest Oilfield Company, Urumqi, Xinjiang 830011, China;
    4. Sinopec Shengli Oilfield Company, Dongying, Shandong 257000, China;
    5. Sinopec Engineering (Group) Co., Ltd., Beijing 100029, China;
    6. Sinopec Zhongyuan Oilfield Company, Puyang, Henan 457001, China;
    7. PetroChina Dagang Oilfield Company, Tianjin 300270, China
  • Received:2022-07-23 Revised:2023-04-25 Online:2023-06-25 Published:2023-07-13

摘要: 为研究二甲醚(DME)在稠油油藏开发中的增产机理,揭示其在油水两相中的传质规律及对稠油的溶胀降黏效果,选取大港油田某区块稠油油样,开展高温高压条件下PVT和填砂管驱替实验。结果表明:DME是一种良好的稠油降黏剂,易溶解于水,更易溶解于原油,在油水两相中具有较强的扩散作用;水可作为载体将DME注入地下,并可通过添加乙醇或乙二醇来提高DME的携带量;对于黏度较低的稠油,可在水驱基础上开展DME水驱,增油效果显著,对于黏度较高无法形成有效驱替的稠油,可考虑采用水或CO2作为载体进行DME吞吐。研究结果对DME在稠油开采中的应用具有重要指导意义。

关键词: 二甲醚, 稠油, 溶胀降黏, 溶解扩散, 分配系数, 开采机理, 提高采收率

Abstract: In order to study the stimulation mechanism of dimethyl ether (DME) in the development of heavy oil reservoir, reveal its mass transfer law in both oil and water phases and its swelling and viscosity reduction effect on heavy oil, a heavy oil sample from a certain block in Dagang Oilfield was selected to carry out PVT and sand-packed tube displacement experiments under high temperature and high pressure conditions. The results show that DME is a good viscosity reducer for heavy oil, easily dissolved in water and more easily dissolved in crude oil, and has strong diffusion effect in both oil and water phases; the water can be used as a carrier to inject DME into the subsurface, and the carrying capacity of DME can be increased by adding ethanol or ethylene glycol; for heavy oil with low viscosity, the DME water flooding can be carried out on the basis of water flooding, with significant oil increase effect, while for heavy oil with high viscosity that cannot form effective drive For heavy oil with high viscosity that cannot form effective displacement, the water or CO2 can be considered as a carrier for DME huff-n-puff. The study results are of great significance for the application of DME in the production of heavy oil.

Key words: DME, heavy oil, swelling and viscosity reduction, dissolution and diffusion, distribution coefficient, production mechanism, enhanced recovery

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