Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, PR China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, PR China.
Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, PR China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; Kazakh-British Technical University, Almaty 050000, Kazakhstan.
Adv Colloid Interface Sci. 2020 Aug;282:102214. doi: 10.1016/j.cis.2020.102214. Epub 2020 Jul 20.
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.
近年来，随着老油田的进一步开发，为了进一步提高采收率，必须进行调驱。在各种调驱方法中，由聚合物和交联剂组成的聚合物凝胶因其效率高、成本低而引起了广泛关注。其中，有机铬凝胶以其良好的地层适应性和高稳定性，在近几十年得到了充分的发展。本综述介绍了制备有机铬凝胶中使用的不同类型的聚合物和交联剂，并分析了影响其性能的机制。在此基础上，介绍了不同地层条件下的有机铬凝胶，包括纳米颗粒增强和复合有机铬凝胶。同时，介绍了有机铬凝胶的评价方法，重点介绍了近几十年来开发的原位测量凝胶形成时间的微流变学方法。基于目前开发的有机铬凝胶和对油田开发现状的分析，提出了使用超分子有机铬凝胶和剪切有机铬凝胶等未来方向。
