State Key Lab of Power Equipment and Electrical Insulation, Xi'an Jiaotong University State Key Lab of Intense
Pulse Radiation Environment simulation and Effect, Northwest Institute of Nuclear Technology MOE Key Lab of
CBM Resources and Reservoir Formation Process, China University of Mining and Technology

为解决煤层气高效开发和煤矿瓦斯治理面临的煤储层增透改造技术难题,研发成功了强度、作用区域、作用次数可控的电脉冲可控冲击波增透煤层新技术,并已开展了多种现场应用探索。冲击波通过破裂、撕裂、弹性声波扰动等方式改造煤储层,具有分段、分频带的基本特征,这种基本特征与重复加载的疲劳效应结合,使得可控冲击波技术具有其他储层改造技术不可比拟的优势。改造效果取决于冲击波幅值、加载次数与煤储层物性的耦合特性,冲击波幅值与煤层物性的耦合作用决定着冲击波在煤层中的传播特性,加载次数与煤储层物性的耦合则与煤储层疲劳效应有关。发明了电脉冲可控冲击波井下作业装置,初步形成了完整的现场作业工艺流程。现场试验证实了该项技术在顺层钻孔煤层改造及瓦斯抽采中的效益和有效性,并显示出地面煤层气井煤储层改造的可观前景。

In order to solve the permeability improved and reconstruction technology of the coal reservoir faced to the coal bed methane high efficient development and the mine gas control, a new technology of the intensity, regional function and multi function controlled electric pulse controllable shock waves was successfully rese arched and developed and several site application discoveries were conducted. The coal reservoir was reconstructed by the shock waves with the breaking, tearing, ela stic sonic wave turbulence and other method. The shock waves would have the sectional and frequency band basic features, the basic features combined with the repe ated loading fatigue effect could make the controllable shock waves with the incomparable advantages than other reservoir reconstruction technologies. The reconstruct ion effect would depend on the coupling features of the shock amplitude value, loading frequency and coal reservoir physical properties, the coupling role of the shock a mplitude value and seam physical properties would decide the propagation features of the shock waves in the seam and the coupling of the loading frequency and coal reservoir physical properties would be related to the fatigue effect of the coal reservoir. An underground mine operation device of the electric pulse controllable shock W aves was innovated and a completed site operation technical process was preliminarily formed. The site experiments showed the benefit and efficiency of the technolog y in the reconstruction of the borehole along the seam and the gas drainage and the conceivable prospects of the coal reservoir reconstruction for the coal bed methan e well at the surface ground.