Optimum design and field practice of multi-branch horizontal CBM well ZHP01-1

Multi-branch horizontal well drilling is one systematic and high-tech project, which integrates optimum design, remote intersection, accurate geosteering, coal protection, hole stability and other techniques. In order to evaluate the adaptability of this technique in Qinshui Basin, Multi-branch horizontal well ZHP01-1 is performed. This paper discusses some key techniques about optimum multi-branch design, remote intersection, drilling fluid, track control, etc. The principle and method of design for CBM wells are also discussed. It may be useful for high efficiency CBM exploration and development.