In order to address the issue of accuracy deficiencies in uncontrollable borehole trajectories,including those used for gas extraction,water exploration,geological exploration,and more,calculations of the corresponding trajectory parameters were performed,followed by field application.The average angle method was implanted into Visual C++6.0 software based on a comparative analysis of five calculation methods for near-horizontal drilling trajectory.This helped develop software capable of processing trajectory measurement data and displaying trajectory diagrams during drilling,as well as an invention that resists geomagnetic interference during drilling.Through the calculation of borehole da-ta,the software displayed the two-dimensional and three-dimensional morphologic trajectory diagram of the borehole.By integrating borehole trajectory with mine production diagram,it formed a track-tracking bottom map that can be used for management,and it divided the blank strip area or exploration blind ar-ea of gas extraction according to the deviation amount.During the industrial trial conducted in Hexi Coal Mine,11 drilling trajectories were exhibited,and analysis and recognition of blank strips of gas extrac-tion were also achieved by referring to the gas extraction drawing of the working face.Field application effects were achieved by mapping drilling trajectories and distributing the blank area of gas extraction.
关键词
近水平钻孔/随钻测量/偏差量/钻孔轨迹/瓦斯抽采空白带
Key words
near-horizontal drilling/measurement while drilling/amount of deviation/drilling track/gas extraction blank zone
维普
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