长期以来页岩气储层微孔隙中气-水分布问题一直是学术界争议的基础问题。而由于页岩的非均值性与复杂的微孔隙结构，常规实验手段难以对页岩内流体流动路径和气-水分布状态进行有效评价，因此对页岩内气-水分布研究较少，且停留在理论假设阶段。为此，本项目将采用新型的纳米示踪剂技术，结合微观运移机理，完善页岩微孔隙内气-水分布模式，并首次提出其量化评价方法。具体包括：首先，通过微孔隙定量表征技术分析不同类型微孔隙特征；通过纳米示踪剂实验实现连通性分析与示踪剂微观运移路径的定量评价。其次，改进页岩生烃增压动力学模型，计算生烃增压动力与毛细管阻力，明确有机孔内天然气向外流动机理。在实验和理论计算基础上，提出页岩孔隙内微观气-水分布模式。最后，通过不同含流体类型孔隙的定量分析与生产井资料实现气-水分布模式的评价与验证。本项目气-水分布研究可促进页岩气赋存状态、富集规律以及储层产水情况的研究，具有重要科学价值。

The gas & water distribution problem in the micropores of shale gas reservoir has been a basic issue disputed by academic circles for a long time. Due to the strong heterogeneity and complex pore structure of shale, it is difficult to use conventional methods to evaluate how the fluid flow and gas & water distribute in shale. So there are few researches on the gas & water distribution in shale. And most of them are still in the stage of theoretical hypothesis. Therefore, this project will combine the new nano-tracer experiments and calculation of fluid migration to try to build the gas & water distribution model and quantitatively evaluation methods. The main research contents include: Firstly, we plan to analyze the characteristics of different kinds of micro-pores in shale based on the quantitative characterization technology of micro-pores. And we plan to analyze the connectivity of shale and build the quantitative characterization method of microscopic migration paths through the experiment of nano-tracer in shale. Then, we plan to modify the concept model of hydrocarbon-generating pressurization and calculate the overpressure caused by hydrocarbon generating and the capillary pressure. Then the mechanism of natural gas flowing outwards in organic pores was clarified. Based on the experimental results and theoretical calculations, the microscopic gas-water distribution in shale pores is proposed. Then the microscopic gas-water distribution model will be evaluated and verified by quantitative evaluation of different types of fluid-bearing pores and production data. The study of gas-water distribution in this project can promote the study of shale gas state, enrichment rule and water production shale gas reservoir, which has important scientific value.