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微地震监测是定量评估水力压裂改造效果的主要方法,对于高效开发非常规油气储层具有重要意义。然而,微地震监测技术在微地震事件产生机理、微地震弱事件检测和定位、综合解释等方面仍然面临诸多挑战。本文以四川盆地某页岩气井综合微地震监测实验为例,从监测台阵、微地震参数获取和资料解释三方面,总结了微地震监测技术的研究现状和发展趋势。结合课题组的研究特色,重点讨论了地面微地震监测台阵、样本事件扫描检测弱地震事件、震源机制反演等技术在水力压裂改造效果中的应用,展望了我国微地震监测技术未来发展方向。
Micro-seismic monitoring is the main method to quantitatively evaluate the effect of hydraulic fracturing retrofit, which is of great significance for the efficient development of unconventional oil and gas reservoirs. However, microseismic monitoring technology still faces many challenges in the mechanism of microseismic events, detection and location of microseismic weak events, comprehensive interpretation and so on. In this paper, taking a microgrid monitoring experiment of gas and gas well in a certain shale of Sichuan Basin as an example, the status quo and development trend of microseismic monitoring technology are summarized from three aspects: monitoring array, acquisition of microseismic parameters and data interpretation. Combined with the research features of the research group, the paper mainly discusses the application of ground microseismic monitoring array, weak event of sample event scanning and detection, the inversion of focal mechanism and so on in the effect of hydraulic fracturing transformation. The future development of microseismic monitoring technology in China is prospected direction.