Due to the well-developed end cleat and surface cleat

the complicated fracture morphology forms easily in the coal-bed fracturing

and the conventional double-wing fracture model is not suitable for the optimization of the coal-bed methane fracturing design. In order to improve the production of the coal-bed methane

we proposed a characterization method for the equivalent seepage of the complex fracture

in which the complex network fracture was equivalent to the high permeability zone. By optimizing the size and permeability of the high permeability zone

we got the best overall fracturing fracture length and fracture conductivity. Meanwhile

we also optimized the pumping parameters by using 3D fracturing simulation software

and carried out the fracturing operation and down-hole micro-seismic moni

tor tests of 3 wells. The results showed that the fracture length covers a wide field and the complexity after fracturing is high

and the average post-fracturing daily production is 1 376.7 m

3

/d. It provides a technical support to the integral fracturing development of coal-bed methane.