Shale oil reservoirs are more complex and difficult to exploit than conventional and tight oil reservoirs because of low porosity, permeability, and rich organic matter. The presence of organic matter has great influence on the flow behaviors of oil in shale and the development methods for shale oil. In this work, the saturation and movability behaviors of oil in organic and inorganic matter of shale were investigated by experimental methods. First, vacuum-imbibition tests were carried out to evaluate the saturated oil amount at different states (in inorganic pores, organic pores, and adsorbed/dissolved in organic matter) in shale cores and to calculate the inorganic/organic saturation and inorganic/organic porosity. The results show that the imbibition volume of oil is 2.4–5.7 times as much as those of KCl solutions for the several shale cores. The excess of imbibition oil is adsorbed or dissolved into the organic matter and dispersed in the organic pores. The organic saturation of oil in the shale samples is from 58.9 to 82.6%, which is 1.4–4.7 times as much as that in inorganic matter. The inorganic porosity is from 1.9 to 4.4%, while the organic porosity is from 0.3 to 1.3%. Moreover, the oil movability under centrifugation in the organic and inorganic matter of shale was measured by nuclear magnetic resonance. The results show that the content of movable oil in inorganic pores is 20–80%, which is higher than that of organic matter with a value of lower than 10%. The total movable content of oil in shale is influenced greatly by the content of movable oil in organic matter. Therefore, how to displace the oil in organic matter is the main problem to be solved in developing shale oil.

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页岩有机和无机质中油饱和度和运动性的实验评价

与传统的致密油储层相比，页岩储层由于孔隙率低，渗透率低，有机物含量高，因此较复杂且难以开采。有机质的存在对页岩油的流动行为及页岩油的开发方法有很大的影响。在这项工作中，通过实验方法研究了油在页岩有机和无机质中的饱和度和运动性。首先，进行真空吸力试验，以评估页岩岩心中不同状态（无机孔隙，有机孔隙以及吸附/溶解在有机质中）的饱和油量，并计算出无机/有机饱和度和无机/有机孔隙度。结果表明，几个页岩岩心的吸油量是KCl溶液的吸水量的2.4-5.7倍。过量的吸油被吸收或溶解到有机物中并分散在有机孔中。页岩样品中石油的有机饱和度为58.9％至82.6％，是无机物的1.4-4.7倍。无机孔隙率为1.9至4.4％，而有机孔隙率为0.3至1.3％。此外，通过核磁共振测量了页岩的有机物和无机物中在离心作用下的油移动性。结果表明，无机孔隙中动油的含量为20-80％，高于有机质含量的有机油，其含量低于10％。页岩中总的可动油含量受有机质中可动油含量的很大影响。因此，如何驱替有机物中的油是开发页岩油要解决的主要问题。