Oil sources and accumulation processes of the Neoproterozoic Luotuoling Formation (∼930 Ma) in the Liaoxi Depression are investigated using integrated fluid inclusion, basin modelling and oil-source rock correlation analyses. In the upper Luotuoling Formation sandstone reservoir in Han-1 well, abundant bitumen inclusions and white fluorescent bitumen-bearing oil inclusions were observed. Combined with microthermometry of aqueous inclusions and burial history analysis, the oil charge time of the upper Luotuoling Formation sandstone reservoir took place at approximately 465–455 Ma. This oil was derived from the Gaoyuzhuang Formation source rock according to biomarkers and isotope compositions. However, oil generation of the Gaoyuzhuang Formation had already ended before 455 Ma, so the oils cannot be generated directly from the Gaoyuzhuang Formation source rocks, but definitely migrated from the destroyed paleo-oil accumulations in the Wumishan or Tieling formations. In addition, the lower Luotuoling Formation sandstone reservoir contains mainly yellowish orange fluorescent oil inclusions. The oil in the lower Luotuoling Formation sandstone reservoir was directly generated from the Hongshuizhuang source rock at 240–230 Ma. The study on oil accumulation history of the Neoproterozoic Luotuoling Formation reservoir is significant for further exploration of Proterozoic petroleum resources in the Liaoxi Depression, North China Craton.

通过流体包裹体、盆地模拟和油源岩对比分析，研究了辽西坳陷新元古代洛托岭组（～930 Ma）的油源及成藏过程。在汉1井洛陀岭组上砂岩储层中，观察到丰富的沥青包裹体和白色荧光含沥青油包裹体。结合水包裹体显微测温和埋藏史分析，洛陀岭组上砂岩储层的充油时间约为465～455 Ma。根据生物标志物和同位素组成，该油来源于高峪庄组烃源岩。但高峪庄组的生油在 455 Ma 之前就已经结束，因此石油不能直接从高峪庄组烃源岩中生成，而肯定是从乌米山组或铁岭组被破坏的古油藏运移而来。此外，下罗陀岭组砂岩储层主要含有黄橙色荧光油包裹体。下罗陀岭组砂岩油藏的石油直接来源于240~230 Ma的红水庄烃源岩。研究新元古代罗陀岭组油藏成藏历史，对进一步勘探华北克拉通辽西坳陷元古代油气资源具有重要意义。下罗陀岭组砂岩储层以黄橙色荧光油包裹体为主。下罗陀岭组砂岩油藏的石油直接来源于240~230 Ma的红水庄烃源岩。研究新元古代罗陀岭组油藏成藏历史，对进一步勘探华北克拉通辽西坳陷元古代油气资源具有重要意义。下罗陀岭组砂岩储层以黄橙色荧光油包裹体为主。下罗陀岭组砂岩油藏的石油直接来源于240~230 Ma的红水庄烃源岩。研究新元古代罗陀岭组油藏成藏历史，对进一步勘探华北克拉通辽西坳陷元古代油气资源具有重要意义。