Special Oil & Gas Reservoirs >

2023 , Vol. 30 >Issue 3: 97 - 105

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.03.012

Reservoir Engineering

Experiment of DME Water Flooding Enhanced Recovery of Heavy Oil Reservoirs

  • Zhang Liang ,
  • Wei Huchao ,
  • Zhang Xiangfeng ,
  • Shi Zhenpeng ,
  • Zhao Zezong ,
  • Wang Xiaoyan ,
  • Zhang Yang ,
  • Yang Hongbin
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  • 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 date: 2022-07-23

  Revised date: 2023-04-25

  Online published: 2023-07-13

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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

Cite this article

Zhang Liang , Wei Huchao , Zhang Xiangfeng , Shi Zhenpeng , Zhao Zezong , Wang Xiaoyan , Zhang Yang , Yang Hongbin . Experiment of DME Water Flooding Enhanced Recovery of Heavy Oil Reservoirs[J]. Special Oil & Gas Reservoirs, 2023 , 30(3) : 97 -105 . DOI: 10.3969/j.issn.1006-6535.2023.03.012

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