低渗煤层多脉冲压裂激励作用的裂缝模型研究

Incentive Fracture Physical Model Study on Multiple Pulse Fracturing of Low Permeability Coal

为了提高适用于低渗煤层气高能气体压裂开发的技术水平,结合全封闭多脉冲压裂工艺特点,分析了多脉冲加载激励煤层产生多裂缝松弛地应力的作用机理及p-T作用过程,研究建立其多裂缝物理模型。该模型为低渗煤层全封闭多脉冲压裂瞬间破岩成缝机理研究及优化工艺设计提供了理论参考。

In order to improve the technology level of high energy gas fracturing development that applied to low permeability coalbed metha, combined with the characteristics of complete closed multi- pulse fracturing technics, the multiple pulse load that drives coal to produce cracks relaxation function mechanism of in-situ stress of coal seam and p-T process has been analysed. Research has established the multiple pulse fracturing low permeability coal fracture physical model of incentive. And combined with the model length calculation, the technological design method has been analysed. And a theoretical guidance for CBM multi-pulse fracturing breaking rock into the seam mechanism research and technics design optimization method can be provided.