渤海湾盆地冀中坳陷深层古潜山油气成藏模式及其主控因素

发布时间：2018-03-23 06:08

本文选题：渤海湾盆地　切入点：冀中坳陷　出处：《天然气工业》2017年04期 　论文类型：期刊论文

【摘要】：渤海湾盆地冀中坳陷深层古潜山油气资源勘探程度较低,但仍具有良好的资源潜力和勘探前景。为此,通过综合分析成藏地质要素,结合有机地球化学分析及流体包裹体等测试结果,研究了深层古潜山油气成藏的主控因素,揭示其油气成藏过程并建立了油气成藏模式。结果表明:①该区深层古潜山油气成藏主要受烃源岩的演化特征、储集体的储集性能以及异常高压等因素的共同控制;②深层古潜山主要存在2种油气成藏模式,一种是早期成藏模式,即古近系沙河街组一段末期—新近系馆陶组末期生成的低熟—成熟油气在浮力和水动力驱动下,向上倾方向充注至古潜山储集体而聚集成藏,具有"侧向油源—缝洞储集—常压充注—早期成藏"的特征,而另一种则是晚期成藏模式,即新近系明化镇组以来生成的轻质油和天然气在异常高压驱动下,向下或侧向充注至古潜山储集体而聚集成藏,具有"顶侧油源—缝洞储集—高压倒灌—晚期成藏"的特征。结论认为:寻找与高成熟烃源岩接触的深层古潜山圈闭应成为该区富油气凹陷重要的勘探策略。
[Abstract]:The exploration degree of deep buried hill oil and gas resources in Jizhong depression of Bohai Bay basin is relatively low, but it still has good resource potential and exploration prospect. Combined with the results of organic geochemical analysis and fluid inclusion test, the main controlling factors of oil and gas accumulation in deep buried hill are studied. The results show that the deep buried hill in this area mainly receives the evolution characteristics of hydrocarbon source rocks. The common control of reservoir performance and abnormal high pressure is that there are two types of oil and gas accumulation models in the deep buried hill, one is the early accumulation model, the other is the early oil and gas accumulation model. That is, the low-mature and mature oil and gas formed at the end of the first member of the Shahejie formation of the Paleogene and the last stage of the Guantao formation of the Neogene system are pumped upward into the buried hill reservoir to form a reservoir driven by buoyancy and hydrodynamic forces. It has the characteristics of "lateral oil source-fracture cavity reservoir, normal pressure filling and early reservoir formation", while the other is the late accumulation model, that is, light oil and natural gas generated since the Minghuazhen formation of the Neogene are driven by abnormal high pressure. Pour downward or laterally into the buried hill reservoir and gather to form a reservoir, It is concluded that the search for deep buried hill traps in contact with highly mature source rocks should be an important exploration strategy for oil-gas rich sag in this area.
【作者单位】：中国石油大学(华东);青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;中国石油大港油田公司;中国石油华北油田公司;
【基金】：国家科技重大专项“渤海湾盆地深层油气地质与增储方向”(编号:2016ZX05006)、“大型地层油气藏油气源分析与输导体系研究”(编号:2017ZX05001) 山东省自然科学基金项目“基于大中型不整合结构体的油气分布规律研究”(编号:ZR2013DM016)
【分类号】：P618.13

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