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- Title
乳化沥青提高原油采收率研究进展.
- Authors
张贵才; 王 磊; 胡俊杰; 王 翔; 蒋 平; 裴海华
- Abstract
Emulsified asphalt has the advantages of good injection performance and high blocking strength, which has more potential for application than other chemical agent systems as a selective plugging agent in the field of oilfield recovery enhancement. In this paper, the development history as well as the application results of the domestic emulsified asphalt water plugging system were summarized. The action mechanism of emulsified asphalt plugging was overviewed by researching domestic and international literature in recent years. First, the emulsion particles in the emulsified asphalt system are captured at the pore throats through deformation, and thus the jamin effect occurred to at the pore throats, increasing the resistance to water flow. In addition, after the emulsified asphalt is broken, the asphalt undergoes agglomeration and adheres to the rock wall to play the role of water plugging. At the same time, the main factors affecting the stability of emulsified asphalt were summarized, including temperature, electrolyte concentration in the aqueous phase, pH value and asphaltene in the dispersed phase, then the mechanism of each factor affecting the stability of emulsified asphalt was discussed. Finally, the latest research progress of emulsified asphalt applied in oilfield profile control and water plugging was described in detail. The analysis showed that emulsified asphalt not only has excellent plugging effect, but also has unique plugging selectivity. In addition, emulsified asphalt can be used in field application by combining with CO2 huff and puff or foam modulation drive. The problems and prospects of emulsified asphalt application in the field of anatomical water plugging were pointed out.
- Publication
Oilfield Chemistry, 2024, Vol 41, Issue 1, p160
- ISSN
1000-4092
- Publication type
Article
- DOI
10.19346/j.cnki.1000-4092.2024.01.022