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:
Oct. 18, 2022
Filed:
Jul. 30, 2019
Southwest Petroleum University, Sichuan, CN;
Wanfen Pu, Sichuan, CN;
Rui Liu, Sichuan, CN;
Shishi Pang, Sichuan, CN;
Lin Sun, Sichuan, CN;
Daijun Du, Sichuan, CN;
SOUTHWEST PETROLEUM UNIVERSITY, Sichuan, CN;
Abstract
The present invention discloses an in-situ emulsification and viscosity increase system with a high phase change point. The system consists of the following components in percentage by weight: 0.2˜0.5% of water-soluble surfactant, 0.2˜1.5% of oil-soluble surfactant, 0.02˜0.5% of lipophilic colloidal particles, 0.02˜0.2% of carrying agent and the balance of mineralized water. The water-soluble surfactant is one of or a combination of petroleum sulfonate, cocamidopropyl betaine, fatty alcohol ether sulfonate, alkanolamide and alkyl glycoside; the oil-soluble surfactant is one of or a combination of propylene glycol monostearate, fatty glyceride, polyoxyethylene sorbitan monostearate, polyoxyethylene fatty alcohol ether, oleic diethanolamide, dodecylamine, octadecyl primary amine, sodium oleate and petroleum acid; the lipophilic colloidal particles are one of liquid paraffin, graphite powder and polyhedral oligomeric silsesquioxane; the carrying agent is one of carboxymethyl-β-cyclodextrin, chitosan quaternary ammonium salt, chitosan hydrochloride, xanthan gum and guar gum. The system is used for water-flooding oil reservoirs and can significantly improve the development effect of water-flooding heavy oil reservoirs.