页岩气藏数值模拟研究现状

A review of numerical simulation of shale gas reservoirs

从页岩气藏气体赋存方式和流动机理、气藏建模方法及数值模拟理论研究和实际应用3个方面阐述了国内外页岩气藏数值模拟技术的研究进展,为该技术的深入研究提供参考。最后,对页岩气藏数值模拟研究进展进行总结,认为存在4个有待于改进和研究的问题:①完善储层模型以考虑有机质的影响;②需要阐明单相气体解吸附、扩散和渗流过程的运移规律和主控因素,并建立气、水两相流动数学模型和数值模型;③天然裂缝和压裂诱导裂缝的准确建模是页岩气藏数值模拟的关键,实际应用中应综合考虑其他监测技术的结果;④针对页岩气藏数值模拟,还需要形成相应的标准和规范,以便更好地指导该类气藏开发。

This article expounds on the recent advancement of the technology all around the world through the following three aspects：shale gas occurrence and flow mechanism ,gas reservoir modeling ,as well as theoretical study and applica-tion of numerical simulation .It suggests that four issues remain to be improved and further probed：①Improving reservoir modeling to take the effect of organic matte into consideration;②Expounding more on flow mechanism and main control-ling factors of single-phase gas desorption ,diffusion and percolation ,and establishing mathematical model and numerical model for two-phase （ gas/water ） flow;③Understanding the importance of accurate modeling of natural and induced frac-tures to shale gas reservoir numerical simulation ,and combining related results of other detecting techniques in practical application;④Establishing corresponding standards and norms for shale gas reservoir numerical simulation .