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:
May. 28, 2019
Filed:
Sep. 20, 2016
Southwest Petroleum University, Sichuan, CN;
Petrochina Huabei Oilfield Company, Hebei, CN;
Liqiang Zhao, Chengdu, CN;
Yong Yang, Cangzhou, CN;
Zhifeng Luo, Chengdu, CN;
Donghe Yu, Cangzhou, CN;
Juan Du, Chengdu, CN;
Guohua Liu, Cangzhou, CN;
Hang Che, Cangzhou, CN;
Guangyan Du, Chengdu, CN;
Yuxin Pei, Chengdu, CN;
Nianyin Li, Chengdu, CN;
Pingli Liu, Chengdu, CN;
Kun Xu, Chengdu, CN;
Bingxiao Liu, Cangzhou, CN;
SOUTHWEST PETROLEUM UNIVERSITY, Chengdu, CN;
Abstract
A phase-change hydraulic fracturing process, including the following steps: (1) injecting clean water or conventional fracturing fluid to a formation, so that the formation fractures; (2) placing non-phase-change liquid and phase-change liquid in different liquid mixing tanks and injecting into a shaft at the same time, an injection volume ratio of the non-phase-change liquid to the phase-change liquid is (0-0.7):(0.3-1); (3) injecting a displacement fluid into the shaft, so that the non-phase-change liquid and the phase-change liquid in the shaft completely enter a reservoir; (4) performing well shut-in and pressure-out for 30-200 min, so that solid-phase matters generated by the phase-change liquid are laid in the fracture; and (5) relieving pressure to finish the construction.