Fracturing and Permeability Increasing Technology for Radial Well in Rapid Unconvering Coal of Shaft
CHEN Bin
ZHAN Qinjian
Abstract：Referencing the controllable technical characteristics of guiding ability of radial well,we creativly applied radial well fracturing technology to shaft uncovering coal at home and abroad.Based on the propagation law analysis of the first fracturing main fracture,we predict extension range of the secondary fracturing main crack.Through the measurement of surface tension and expansive force of fracturing fluid,we determine that 2％ KCL solution is as the preferred fracturing fluid.Then,the direction and the construction design of radial well are carried out,and the industrial test is carried out.The test shows that the new technology greatly increases the gas permeability of pre-uncovering coal seam through technological transformation,and the radial well fracturing and permeability increasing effect is remarkable.
Keywords：low permeabilitycrack propagationnumerical modelingradial wellcoal uncoveringhydrofracture
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 76-79 )