How to Strengthen CBM Extraction: A Case Study for Hydraulic Technology of Ultra-high Pressure with Low Flow

Author(s): Chaojie Wang (presenter)

In order to improve CBM production in coal seams with high in-situ stress and low permeability, hydraulic technology is one of the most commonly used ways to increase coal permeability. However, in traditional water jet cutting, there are a series of problems in a coal seam with high gas content, such as large jet flow resulting in serious borehole blockage and poor working environment. The traditional slotting pressure is mostly concentrated in 30 ~ 60MPa, and little attention is paid to the ultra-high pressure and low flow water jet cutting when the cutting pressure reaches 100MPa. This presentation proposes a technology of ultra-high pressure with low flow water jet slotting. The research results have shown that CBM production can be greatly increased, which can also eliminate the hidden danger of gas disaster in coal seams.

Bios:

Chaojie Wang Assistant Professor, China University of Petroleum (East China)

Dr. Chaojie Wang graduated from China University of Mining and Technology, and now works at China University of Petroleum (East China) as an Assistant Professor. His research interests mainly involve the field of unconventional oil and gas energy exploitation and disaster prevention and control such as coalbed methane. He has completed more than 20 research projects for various governments and enterprises in China. He has published more than 20 high-level papers in Fuel, Rock Mechanics and Rock Engineering, Process Safety and Environmental Protection, etc., authorized three invention patents, and won two provincial and municipal awards. He has been invited to be the reviewer of more than 10 international journals, including Fuel, Scientific Reports, Energy Science & Engineering, Natural Resources Research, Energy Exploration, and Exploitation.