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- Title
新型凝胶颗粒与聚驱后非均质油层的配伍性.
- Authors
高 倩
- Abstract
In view of the problems of traditional gel-particle profile-controlling and plugging agent characterized by weak elasticity, ease to break and poor long-term stability, a new type of gel particles with flexibility and not easily be broken has been developed in Daqing oilfield. In order to improve deep plugging effect of new gel particles on heterogeneous reservoir after polymer flooded, physical simulation experiments are carried out to determine deep migration and plugging performance of gel particles with different sizes in oil layer. Gel particle sizes with the best profile improving performance to heterogeneous reservoir after polymer flooded are optimized, and the percolation law and oil displacement effect of composite system consisting of gel particles and polymer are studied. The results show that gel particles with particle sizes of[0.15, 0.30]mm have better compatibility with polymer flooded reservoirs. After swelling, the particles migrate to deep part of reservoir through pore throats in the way of“accumulation plugging-pressure rise-deformation migration”, plug high permeability layer and make polymer solution flow into medium and low permeability layers, realize alternate plugging-flooding and dynamic profile control and flooding, thus can greatly reduce average oil saturations of medium and low permeability layers, and further enhance oil recovery by 13.51% after polymer flooded. The research results provide theoretical support for the application of new profile-controlling and plugging agent after polymer flooding.
- Publication
Petroleum Geology & Oilfield Development in Daqing, 2022, Vol 41, Issue 5, p112
- ISSN
1000-3754
- Publication type
Article
- DOI
10.19597/J.ISSN.1000-3754.202106012