Oil mobility is essential for the evaluation of shale oil resources, yet there has been limited research conducted on the oil mobility of low- to medium-maturity lacustrine shale. This study integrates multiple methodologies such as organic geochemistry, mineralogy, oil-kerogen adsorption-swelling experiments, and in-situ conversion process (ICP) models to evaluate the mobility and potential for shale oil in the lacustrine shale of the Yanchang Formation in the Yaoqu 1 (YQ1) well situated in the southeastern region of the Ordos Basin. The Chang 7 shales are categorized as highly favorable source rocks, nonetheless, the oil contained within these layers predominantly exists in an adsorbed-swelling state, resulting in limited mobility as indicated by the oil saturation index, a modified oversaturation index, and production index. Therefore, the utilization of existing conventional techniques for shale oil exploitation is not viable for the Chang 7 shale characterized by low to medium maturity in the study area. Nevertheless, during the ICP, the quantity and mobility of oil within the Chang 7 shales exhibit a substantial increase as temperature rises. Moreover, once the Chang 7 type II shales reach a maturity level of around 0.91%R_o, they demonstrate noteworthy prospects for shale oil production. The findings of this study serve as a valuable reference for guiding the advancement of in-situ conversion process technology in the study area, while also offering substantial evidence for addressing the intricate challenge of crude oil mobility in low- to medium-maturity lacustrine shale reservoirs.

石油流度对于页岩油资源评价至关重要，但目前对中低成熟度湖相页岩石油流度的研究还很有限。这项研究综合了多种方法，例如有机地球化学、矿物学、油干酪根吸附膨胀实验和in-原位ICP模型评价鄂尔多斯盆地东南部窑曲1井延长组湖相页岩中页岩油的流动性和潜力。长7页岩被归类为非常有利的烃源岩，然而，这些层中所含的石油主要以吸附膨胀状态存在，导致含油饱和度指数、修正过饱和度指数和生产指数表明流动性有限。因此，利用现有的常规页岩油开采技术对于研究区中低成熟度的长7页岩来说不可行。然而，在ICP过程中，长7页岩内的石油数量和流动性随着温度的升高而大幅增加。此外，一旦长7二类页岩成熟度达到0.91%R_o左右，页岩油生产前景值得关注。本研究结果为指导研究区原位转化工艺技术的进步提供了有价值的参考，同时也为研究区解决中低成熟度湖相页岩油藏原油流动性的复杂挑战。