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:
Mar. 02, 2021
Filed:
Jan. 06, 2020
China University of Petroleum—beijing, Beijing, CN;
Qichao Lv, Beijing, CN;
Tongke Zhou, Beijing, CN;
Rong Zheng, Beijing, CN;
Zhaoxia Dong, Beijing, CN;
Haimin Zheng, Beijing, CN;
Juan Zhang, Beijing, CN;
Meiqin Lin, Beijing, CN;
Zihao Yang, Beijing, CN;
Jingxue Wang, Beijing, CN;
CHINA UNIVERSITY OF PETROLEUM-BEIJING, Beijing, CN;
Abstract
The disclosure discloses a foam fracturing fluid with double interface layers of a phlogisticated air-liquid COfor shale gas development, and a preparation method thereof. The foam fracturing fluid is prepared from a liquid COphase, a gas phase and a nano-enhancer; the liquid COphase is formed by dissolving a mixture of gas-soluble foaming agents in liquid CO; the gas phase is a gas mixture of phlogisticated air and saturated vapor of the liquid CO; the nano-enhancer is an aqueous solution of a mixture of hydrophobic silica nanoparticles, a cosolvent and a water-soluble surfactant. In the fracturing fluid prepared by the present disclosure, the phlogisticated air was encapsulated by the liquid COto form an interface layer, the liquid COwas further encapsulated by the nano-enhancer to form the other interface layer, which enhanced the structural stability of the fracturing fluid while achieving high viscosity and thermal stability.