Title:
SHALE GAS LAYER OXIDATIVE BURST TRANSFORMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/035416
Kind Code:
A1
Abstract:
A shale gas layer oxidative burst transformation method, comprising: performing hydraulic fracturing transformation on a shale gas well to be fractured; and in the hydraulic fracturing process, pumping slickwater A (f), oxidation liquid (e), slickwater containing glue liquid (d), catalytic decomposition liquid (c), and slickwater B (b) in a slug mode in sequence, and integrating shale physical characteristics and chemical thermodynamic properties to provide a fracturing fluid usage and oxidation burst sweep radius calculation formula. According to the method, the methane gas released by the shale gas layer after fracturing by the slick water A (f) is mixed with oxygen generated by the decomposition of hydrogen peroxide in the oxidation solution (e), and the shale gas layer is burst, such that the safe, efficient and damage-free multi-scale yield increasing transformation of hydraulic fractures, explosion fractures and corrosion apertures is achieved.
Inventors:
YOU LIJUN (CN)
CHENG QIUYANG (CN)
QIAN RUI (CN)
KANG YILI (CN)
ZHANG NAN (CN)
ZHOU YANG (CN)
CHEN YANG (CN)
WANG FURONG (CN)
CHENG QIUYANG (CN)
QIAN RUI (CN)
KANG YILI (CN)
ZHANG NAN (CN)
ZHOU YANG (CN)
CHEN YANG (CN)
WANG FURONG (CN)
Application Number:
PCT/CN2021/132628
Publication Date:
March 16, 2023
Filing Date:
November 24, 2021
Export Citation:
Assignee:
SOUTHWESTERN PETROLEUM UNIV (CN)
International Classes:
E21B43/263; E21B43/247
Foreign References:
| US20190010384A1 | 2019-01-10 | |||
| CN106437649A | 2017-02-22 | |||
| CN108252700A | 2018-07-06 | |||
| CN105626028A | 2016-06-01 | |||
| CN104564007A | 2015-04-29 | |||
| US9664023B1 | 2017-05-30 | |||
| CN101078343A | 2007-11-28 | |||
| CN109751031A | 2019-05-14 | |||
| CN103421484A | 2013-12-04 | |||
| CN109370557A | 2019-02-22 | |||
| US3896879A | 1975-07-29 | |||
| US4548252A | 1985-10-22 |
Other References:
YOU LIJUN, YILI KANG, QIANG CHEN, CHAOHE FANG, PENGFEI YANG: "Prospect of shale gas recovery enhancement by oxidation-induced rock burst", NATURAL GAS INDUSTRY - TIANRANQI GONGYE, TIANRANQI GONGYE ZAZHISHE, CN, vol. 37, no. 5, 26 May 2017 (2017-05-26), CN , pages 53 - 61, XP093045683, ISSN: 1000-0976, DOI: 10.3787/j.issn.1000-0976.2017.05.007
Attorney, Agent or Firm:
BEIJING YUANBEN INTELLECTUAL PROPERTY LAW OFFICE (GENERAL PARTNERSHIP) (CN)
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