The advances of organic chromium based polymer gels and their application in improved oil recovery

In recent years, with the further development of old oilfields, in order to further improve the oil recovery, they must be conformance controlled. Among various types of conformance control methods, polymer gels composed of polymers and crosslinkers have attracted widespread attention because of the...

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Bibliographic Details
Published in:Advances in colloid and interface science 2020-08, Vol.282, p.102214-102214, Article 102214
Main Authors: Zhang, Hongwen, Yang, Hongbin, Sarsenbekuly, Bauyrzhan, Zhang, Min, Jiang, Haizhuang, Kang, Wanli, Aidarova, Saule
Format: Article
Language:English
Subjects:
Conformance control
Enhanced oil recovery (EOR)
Organic chromium
Polymer gel
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Summary:In recent years, with the further development of old oilfields, in order to further improve the oil recovery, they must be conformance controlled. Among various types of conformance control methods, polymer gels composed of polymers and crosslinkers have attracted widespread attention because of their efficiency and low costs. Among them, organic chromium gels with their good formation adaptability and high stability have been fully developed in recent decades. This review introduces the different types of polymers and crosslinkers used in the preparation of organic chromium gels, and the mechanisms of affecting their performance are analyzed. On this basis, the organic chromium gels for different formation conditions are introduced, including nanoparticle-reinforced and compound organic chromium gels. At the same time, evaluation methods of organic chromium gels are introduced, while the focus is on the in-situ measurement method (mirco-rheology) of gel formation time developed in recent decades. Based on the currently developed organic chromium gel and the analysis of the development status in oilfields, future directions like the use of supramolecular organic chromium gel and shear organic chromium gel are suggested. [Display omitted] •Mechanisms, methods and influenced parameters for organic chromium based polymer gels are summarized•Organic chromium based polymer gels suitable for different reservoir types are introduced in detail.•Insightful next research direction of organic chromium based polymer gels for EOR process are proposed
ISSN:0001-8686
1873-3727
DOI:10.1016/j.cis.2020.102214