Title:
METHOD FOR GAS EXTRACTION ALTERNATING OSCILLATING PULSE HIGH ENERGY GAS EXTRACTION WITH THERMAL INJECTION
Document Type and Number:
WIPO Patent Application WO/2016/110185
Kind Code:
A1
Abstract:
Disclosed is a method for gas extraction involving alternation of oscillating pulse high energy gas extraction with thermal injection. First, high energy gas fracturing technology is used to form a fracture network in a thermal injection borehole (3), then a steam generator (12) is used to force high-pressure, cyclically temperature-changing steam into said borehole (3); the steam passing through a spinning oscillating-pulse jet nozzle (6) forms an oscillating superheated steam, alternatingly impacting and heating the coal body. The present method is applicable to managing gas extraction from microporous, low-permeability, high-adsorption coal seam areas, overcoming the limitations of simple permeability-increasing techniques; using high energy gas fracturing of the coal body increases the disturbance range around a single well, forming a fracture network that provides channels for passage of the superheated steam, while oscillating changes in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of alternation of the two enhances gas desorption and extraction efficiency.
Inventors:
LIN BAIQUAN (CN)
ZOU QUANLE (CN)
LIU TING (CN)
GUO CHANG (CN)
ZHU CHUANJIE (CN)
KONG JIA (CN)
YAN FAZHI (CN)
YAO HAO (CN)
HONG YIDOU (CN)
ZOU QUANLE (CN)
LIU TING (CN)
GUO CHANG (CN)
ZHU CHUANJIE (CN)
KONG JIA (CN)
YAN FAZHI (CN)
YAO HAO (CN)
HONG YIDOU (CN)
Application Number:
PCT/CN2015/098153
Publication Date:
July 14, 2016
Filing Date:
December 22, 2015
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21B43/26; E21F7/00
Foreign References:
| CN104632270A | 2015-05-20 | |||
| CN101832149A | 2010-09-15 | |||
| CN1676870A | 2005-10-05 | |||
| CN103206199A | 2013-07-17 | |||
| EP2527586A1 | 2012-11-28 | |||
| US7445045B2 | 2008-11-04 |
Attorney, Agent or Firm:
JW IP LAW FIRM (CN)
北京德崇智捷知识产权代理有限公司 (CN)
北京德崇智捷知识产权代理有限公司 (CN)
Download PDF: