Underground drilling track measuring method and coal seam fracturing permeability increasing method

Abstract

The invention discloses an underground drilling track measuring method and a coal seam fracturing permeability increasing method. The underground drilling track measuring method comprises the steps that drilling track monitoring data are processed; and track monitoring is carried out through a micro-seismic tester in the drilling process, and data processing is carried out through three-dimensional software to construct a drill hole trend three-dimensional model. The coal seam fracturing permeability increasing comprises the steps of drilling construction and fracturing permeability increasing construction, and fracturing permeability increasing is implemented on the basis of fracturing drilling holes obtained through drilling. The drilling construction is carried out according to the method, before drilling, a drilling design trend three-dimensional model is constructed, after drilling, the actual trend is compared with the design trend, and the scheme is adjusted according to the difference. The underground drilling track measuring method has the beneficial effects that the drilling direction and the distribution condition of a plurality of drilled holes can be accurately judged. According to the coal seam fracturing permeability increasing method, the actual trend of a fracturing drill hole is compared with the design trend, so that a design scheme is adjusted in real time according to the difference, the construction efficiency is improved, the mining progress is accelerated, and the mining efficiency is improved.

Description

technical field [0001] The invention relates to underground construction technology, in particular to a coal seam fracturing anti-permeability method for measuring underground drilling trajectories. Background technique [0002] In the process of geological exploration and coal seam permeability enhancement fracturing, multiple boreholes need to be drilled, and the distribution of boreholes has a decisive impact on the geological exploration results and the effect of permeability enhancement fracturing. Especially in coal seam enhancement fracturing, the arrangement, quantity and depth of fracturing holes are all important contents of fracturing scheme design. Due to the large number of fracturing holes and the large distribution range, it not only affects the fracturing effect, but also has a direct impact on the construction progress of coal seam mining. Reasonable layout and quantity can effectively shorten the drilling construction time and speed up the construction pro...

AI Technical Summary

Problems solved by technology

However, for deep hole drilling, along with the deepening of the borehole and the change of the geological conditions of the rock formation and coal seam, the direction of the borehole will usually change, or even turn at a larger angle. There is a big difference between the actual distribution in the coal seam and the design scheme that only controls the distribution of orifices, and there may even be a few false holes that do not play a practical role in geological exploration or fracturing, which will affect the effect of fracturing and increase permeability accordingly.