页岩气数值模拟技术进展及展望

页岩气是重要的非常规资源,数值模拟技术对于页岩气藏的开发具有重要的意义。综述了页岩气数值模拟技术的进展,论述了页岩气的储集和运移方式,讨论了在页岩孔隙中运移的表征方法;目前页岩气数值模拟分为双重介质、多重介质及等效介质3种模型;在分析了目前页岩气数值模拟技术研究中存在问题的基础上,对其未来发展方向进行了展望。未来页岩气数值模拟技术的发展方向为:研究页岩气气水两相运移机制,开展气水两相页岩气数值模拟;研究页岩中有机质分布规律及有机质孔隙气水运移规律,建立考虑有机质影响的页岩气数值模拟模型;研究页岩气吸附气运移机制,建立准确描述页岩气解吸机制的页岩气数值模拟模型。

Recent development and prospect on numerical simulation of shale gas reservoirs

Shale gas reservoirs are important unconventional reservoirs.Numerical simulation has played important role on the development of shale gas.In this paper,the recent development of numerical simulation of shale gas is reviewed and the future trends are given.The gas storage and transport mechanisms in shale gas reservoirs and the methods describing the gas flow in shale pores are discussed.The current numerical simulation models such as dual continuum model,multi-continuum model and effective continuum model are summarized.In addition,the shortcomings of the existing numerical simulation methods are pointed out and the prospect of numerical simulation methods of shale gas is explored.The future shale gas numerical simulation should be developed in the following three aspects;firstly,the shale gas numerical simulation models should take into account of gas-water two phase transport mechanisms;secondly,the distribution of organic matter in shale and the gas-water transport mechanisms in organic mat-ter should be studied and considered in the numerical models;thirdly,the adsorbed gas transport mechanism in shale should be studied and numerical models should consider the transport mechanism.