A coupled study of fluid inclusions and one-dimensional basin modeling allowed the reconstruction of the early hydrocarbon filling history of the main petroleum systems of the Potiguar Basin, Brazil. Confocal laser scanning microscopy, microthermometry and fluorescence spectra measurements were used to model PVTx properties of petroleum inclusions in samples from the onshore Lorena and the offshore Ubarana oilfields. The fluid inclusion data and basin modeling suggest that the initial filling of the Lorena reservoir (Pendência Formation) occurred during the rift stage in two scenarios at 62.7–80.6 °C (11–16.8 MPa): (i) the late rift phase in the Barremian–Early Aptian (ca. 129–124 Ma) or during the beginning of the uplifting phase in the Aptian (ca. 118–117 Ma). In the Ubarana Oilfield, hydrothermal fluids migrated alongside petroleum during the reservoir initial filling. Fluid inclusion homogenization temperatures for both the Açu (mode interval of homogenization temperatures, T_{h(LV→L) mode interval} = 124–128 °C) and Ponta do Mel (T_{h(LV→L) mode interval} = 115–130 °C) formations are higher than the present-day reservoir temperature (110 °C). Isochoric modeling of saddle dolomite-hosted fluid inclusions from the Ponta do Mel Formation indicates trapping temperatures between 128.9 and 133.1 °C and pressures between 10.6 and 12.9 MPa. Temperatures and salinities (16 and 20 mass % equivalent in NaCl + CaCl₂) of aqueous inclusions hosted in saddle dolomite are similar to those of the fluid inclusions trapped in hydrothermal minerals in Mississippi Valley-Type Pb–Zn deposits. No specific timing can be suggested for the hydrothermal event in Ubarana Oilfield. However, this atypical (hydrothermal) petroleum system could be linked to two possible scenarios: (i) the onset of petroleum migration of the Alagamar Formation during the Cenozoic Macau (ca. 48–8.8 Ma) magmatic event; or (ii) an earlier activity of the petroleum system, prior to the peak oil generation (50–10 Ma).

流体包裹体和一维盆地建模的耦合研究允许重建巴西 Potiguar 盆地主要石油系统的早期油气充注历史。共聚焦激光扫描显微镜、显微温度测量法和荧光光谱测量用于模拟来自陆上 Lorena 和海上 Ubarana 油田样品中石油包裹体的 PVTx 特性。流体包裹体数据和盆地模型表明 Lorena 储层（Pendência 组）的初始充填发生在裂谷阶段，温度为 62.7-80.6 °C（11-16.8 MPa）：（i）裂谷晚期Barremian-Aptian 早期（约 129-124 Ma）或在 Aptian 抬升阶段的开始（约 118-117 Ma）。在乌巴拉纳油田，在储层初始充填期间，热液流体与石油一起运移。Acu 的流体夹杂物均质温度（均质温度的模式区间，T_{h (LV→L) 模式区间} = 124–128 °C) 和 Ponta do Mel (T _{h (LV→L) 模式区间} = 115–130 °C) 地层高于当前储层温度 (110 °C) ）。来自 Ponta do Mel 地层的鞍状白云岩包裹体流体包裹体的等容模型表明，圈闭温度在 128.9 到 133.1 °C 之间，压力在 10.6 到 12.9 MPa 之间。温度和盐度（16 和 20 质量 % 在 NaCl + CaCl _{2 中的}当量) 存在于鞍状白云岩中的含水包裹体与密西西比河谷型铅锌矿床中热液矿物中的流体包裹体相似。对于 Ubarana 油田的热液事件，没有具体的时间建议。然而，这种非典型（热液）石油系统可能与两种可能的情况有关：（i）在新生代澳门（约 48-8.8 Ma）岩浆事件期间阿拉加玛组的石油运移开始；或 (ii) 石油系统的早期活动，在产油峰值（50-10 Ma）之前。