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:
Nov. 26, 2024
Filed:
May. 14, 2024
Tianfu Yongxing Laboratory, Chengdu, CN;
Qingyuan Chen, Chengdu, CN;
Jinzhou Zhao, Chengdu, CN;
Wanfen Pu, Chengdu, CN;
Xiaodong Tang, Chengdu, CN;
Chao Shen, Chengdu, CN;
Shuai Zhao, Chengdu, CN;
Su Liu, Chengdu, CN;
Ziyuan Yi, Chengdu, CN;
Zijia Liao, Chengdu, CN;
TIANFU YONGXING LABORATORY, , CN;
Abstract
A displacement system designed for robust heterogeneous oil reservoirs and its application within the oil exploitation field. System comprises a polymer-enhanced foam plugging agent and an active polymer flooding agent. Plugging agent consists of 0.12% bio-polysaccharide polymer diutan gum foam stabilizer and 0.4% α-olefin sulfonate foaming agent by mass. The active polymer flooding agent is formulated through free radical polymerization, with components comprising a total monomer concentration of 27.5%, wherein monomer A to monomer B ratio is 7.5:2.5, monomer C constitutes 5.5% of the total monomer concentration, and water comprises the remaining. Monomer A is acrylamide, monomer B is 2-acrylamide-2-methyl propane sulfonic acid, and monomer C is a quaternary ammonium salt type active monomer. Demonstrated through parallel core displacement experiments, this displacement system exhibits effective displacement in heterogeneous oil reservoirs with a permeability gradation of 30 at 65° C., significantly enhancing oil recovery rates in robust heterogeneous oil reservoirs.