FIELD TESTING OF FRACTURING TECHNOLOGY IN COAL FORMED GAS WELL

Coal formed gas is a import energy which is a kind of unconventional gas of stored in coal bed and adjacent formation, its principal ingredient is methane. For Coal Bed Methane(CBM) production, the pore passage must be established between natural fracture and well bore. Stimulation is the best method to establish the pore passage. The mechanism of fracture for CBM well has been studied through the stimulation job on well group Jinshi-1. Because Youny’s modulus of coal bed is lower an order than conventional sandstone, the longer support fracture is difficulty created. The parameter of coal bed rock mechanism of Jincheng area was obtained through lab experiment. According to the geological property of coal bed, the coal bed methane well fracture technology was optimized, the fracture treatment was completed and fracture direction was monitored. The efficiency successfully of the technology was evaluated.