Technology and application of directional hydraulic penetration permeability improvement by guided groove
Abstract：In view of the problem of gas drainage from holes through coal in the low permeability coal seam, a new per- meability improvement technology of directional hydraulic penetration by guided groove was put forward. The direction- al hydraulic fracturing of guided groove hole directed by guided groove and control hole, the coal between guided groove hole and control hole was penetrated, and took coal out by high pressure water, made the hole controlled coal loose stress, and improved the coal permeability effectively. The directional hydraulic mechanism was put forward and analyzed. Permeability improvement technology of directional hydraulic penetration by guided groove was described and studied in detail. The in-situ experimental results show that gas drainage scope rise more than 1 time, the hole flow increases by an average of 3.87 times ,boreholes engineering reduce 65%.
Keywords：guided groovedirectional hydraulic penetrationpermeability improvementgas drainage
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1326-1331 )