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:
Apr. 23, 2019
Filed:
Jul. 19, 2018
China University of Petroleum (East China), Shandong, CN;
Guang Zhao, Qingdao Shandong, CN;
Caili Dai, Qingdao Shandong, CN;
Chenglin Gu, Qingdao Shandong, CN;
Yuyang Li, Qingdao Shandong, CN;
Yahui Lv, Qingdao Shandong, CN;
Qing You, Qingdao Shandong, CN;
Yongpeng Sun, Qingdao Shandong, CN;
Mingwei Zhao, Qingdao Shandong, CN;
Yining Wu, Qingdao Shandong, CN;
Abstract
The present invention provides a modified nano-graphite particle three-phase foam profile control and flooding system, which comprises a liquid phase and a gas phase, wherein the liquid phase comprises 0.15%-0.35% foaming agent, 0.04-0.1% foam stabilizer, and water that accounts for the remaining content, the sum of weight percentages of above components is 100%; a gas-liquid ratio of the gas phase to the liquid phase is (1-3):1. The foaming agent is selected from one of alkylsulfopropyl betaine and alkylamidopropyl betaine or a combination of them. The foam stabilizer is modified nano-graphite particles in 80-150 nm particle diameter. The present invention further provides a preparation method of the modified nano-graphite particle and a preparation method of the three-phase foam profile control and flooding system. The nano-graphite particle three-phase foam profile control and flooding system provided in the present invention can greatly improve the stability of generated foams, has excellent fluidity control capability, is low in cost, simple to prepare, and convenient for large-scale field construction.