In unconventional resource exploitation, an accurate evaluation of the oil content in shale is essential for locating favorable exploration zones. However, the substantial heterogeneity in shales has caused significant uncertainty in exploration. The commonly applied oil content evaluation model uses a single oil movable threshold (OMT) as a constraint. However, the OMT value is not unique in shale evolution. In this research, the parameter T_max representing the thermal maturity of the source rock is introduced as a variable to construct an innovative three-dimensional model for oil content evaluation. The source rock of the Paleogene Shahejie Formation in the Bohai Bay Basin was selected as an example to demonstrate the application. With an initial value of 84.1 mg HC/g TOC, the OMT decreased with increasing T_max, eventually reaching 51.2 mg HC/g TOC. The proportions of enriched, moderately enriched, less efficient, and invalid resources were 31.6%, 6.6%, 47.4%, and 14.5%, respectively. Our new model is advantageous because it evaluates the shale oil quality in terms of geochemistry and oil movability within the context of thermal maturity. Our research can offer a more accurate model and workflow for shale oil evaluation to can reduce the potential exploration risk.

在非常规资源开发中，准确评价页岩含油量对于定位有利勘探区至关重要。然而，页岩的巨大异质性给勘探带来了很大的不确定性。常用的含油量评价模型使用单一的石油可动阈值（OMT）作为约束。然而，OMT 值在页岩演化中并不是唯一的。在这项研究中，参数T_最大引入代表烃源岩热成熟度的变量作为含油量评价的创新三维模型。以渤海湾盆地古近系沙河街组烃源岩为例进行应用论证。初始值为 84.1 mg HC/g TOC，OMT 随 T _{max 的}增加而降低，最终达到 51.2 mg HC/g TOC。富集、中富集、低效资源和无效资源的比例分别为31.6%、6.6%、47.4%和14.5%。我们的新模型是有利的，因为它在热成熟度的背景下根据地球化学和石油可移动性评估页岩油质量。我们的研究可以为页岩油评估提供更准确的模型和工作流程，以降低潜在的勘探风险。