The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2019
Filed:
Dec. 27, 2018
China University of Petroleum (East China), Qingdao, CN;
China University of Geosciences (Beijing), Beijing, CN;
Oil and Gas Technology Research Institute, Petrochina Changqing Oilfield Company, Xi'an, CN;
Guang Zhao, Qingdao, CN;
Caili Dai, Qingdao, CN;
Qing You, Beijing, CN;
Sen Wang, Qingdao, CN;
Hai'en Yang, Xi'an, CN;
Ping Yi, Xi'an, CN;
Lin Li, Qingdao, CN;
China University of Petroleum (East China), Qingdao, CN;
China University of Geosciences (Beijing), Beijing, CN;
Oil and Gas Technology Research Institute, PetroChina Changqing Oilfield Company, Xi'an, CN;
Abstract
The present invention relates to the field of profile control and flooding in oil fields, particularly to a colloidal nano-graphite-strengthened bulk gel system for dispersed particle gel, and composition thereof. The composition for bulk gel system, containing a polymeric matrix, a resin cross-linking agent, a coagulant, and colloidal nano-graphite, wherein, with respect to 100 parts by weight of the polymeric matrix, a content of the resin cross-linking agent is 30-150 parts by weight, a content of the coagulant is 5-100 parts by weight, and a content of the colloidal nano-graphite is 3-30 parts by weight; wherein, the polymeric matrix is partially hydrolyzed polyacrylamide with weight-average molecular weight within a range of 5,000,000-8,000,000 g/mol; the coagulant is one or more of chloride salt coagulant and alcohol amine coagulant. The specific components in the composition for dispersed particle gel in the present invention have excellent compatibility with each other, and can form a high-strength bulk gel system within 3-6h at 85-95° C., and the obtained dispersed particle gel has relatively high temperature-resistance and salinity-resistance properties.