鄂尔多斯盆地西北部长8 油层组为典型的特低渗透、超低渗透油藏，储层参数的控制因素与平面分 布规律复杂，已成为油藏评价和开发建产中急需解决的问题。在单井精细解释基础上，通过对含油饱和度 分布规律和控制因素的分析，应用测井多井评价技术对特低渗透油藏开展多学科结合研究，建立了特低 渗透储层含油富集程度和烃源岩有机质丰度测井表征方法，提出烃源岩生烃能力与储层含油富集程度的 有效配置控制了有利富集区的分布。基于源储配置思路，研究了特低渗透油藏的富集规律，并优选出了富 集区。该研究对特低渗透油藏规避快速建产风险，加快勘探开发进程，提高整体效益具有重要意义和推广 价值，对致密油气等非常规领域的研究具有参考价值。

Chang 8 oil reservoir set in northwestern Ordos Basin is characterized by low permeability，complex controlling factors and distribution rule of reservoir parameters. So it has become an urgent problem for reservoir evaluation and production. On the basis of fine logging interpretation for wells，oil saturation distribution rule and its controlling factors were analyzed, and well loggingmulti-well evaluation technique based on multi-subject combination was applied to low permeability reservoirs. Thus the method for characterizing the degree of oil concentration and hydrocarbon abundance by using logging data was established, and the idea that the collocation relationship between hydrocarbon generating ability of source rocks and oil concentration degree of reservoir controls the distribution of rich oil gathered blocks was put forward. Based on the clue of source rock-reservoir collocation, the oil enrichment rule of low permeability reservoirs was studied and the oil enrichment areas were chosen. The study is important to evade the risks of quick productivity construction of low permeability reservoirs, and it can also accelerate the process of exploration and development and enhance the whole benefit.