Abstract
The paper introduced a new technique named underground hydraulic fracture stimulation to improve gas drainage efficiency. And the technique was successfully applied in a steep gassy coal seam in Huainan of China. Application results showed that water injection changed water/gas content distribution greatly and gas drainage efficiency was improved greatly. After the stimulation, central part of coal seam around fracturing borehole showed lower water content and much higher gas content than other parts. Average pure gas flow rate for single borehole of central part is 3~8 times higher than that of original part. The upper and below part showed higher water content and lower gas content than central part. The phenomenon is closely related to the steep structure of coal seam. In consideration of the wide distribution of steep gassy coal seam in China, the results have great significance for popularisation and application of the technique in Chinese coal mines. [Received: December 11, 2014; Accepted: July 4, 2015]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Oil, Gas and Coal Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
