李熹微,陈柯童,张海鑫,赵懿,李雅雯,焦亚先,温馨,李依航,陈昉,刘宗堡
Li Xiwei,Chen Ketong,Zhang Haixin,Zhao Yi,Li Yawen,Jiao Yaxian,Wen Xin,Li Yihang,Chen Fang,Liu Zongbao

• 1:中国石油华北油田公司勘探事业部
• 2:中国石油华北油田公司勘探开发研究院
• 3:东北石油大学地球科学学院

摘要(Abstract)：

为明确新生界构造活动在渤海湾盆地饶阳凹陷浅层油气成藏中的改造作用，进行了流体包裹体分析测试，同时结合埋藏史和断-盖封闭性评价，从浅层储层流体包裹体特征差异分析入手，揭示浅层油气成藏及改造过程。结果表明：虽然新生界晚期2次重要的构造变动使得研究区流体包裹体存在局部异常值，但浅层储层仍可识别出3期油气充注，分别对应黄色（80～90℃）、黄白色-黄绿色（90～120℃）和蓝绿色（120～140℃）的流体包裹体荧光色；东营组显示连续的Ⅰ、Ⅱ、Ⅲ期油气充注过程，而馆陶组油藏主要以Ⅱ期充注为主，缺乏低熟（Ⅰ期）和成熟（Ⅲ期）油气的充注；东营组油气主要通过古近纪―新近纪持续活动的油源断裂沟通下部沙河街组烃源岩聚集成藏，并存在明显的二次改造作用，而馆陶组油藏则为下部东营组在12 Ma左右发生的油气逸散再聚集成藏，油藏分布主要受控于东营组顶部断-盖厚度阈值低于62 m的断接带位置。研究成果为冀中坳陷全层系油气勘探突破提供了理论支撑。
To investigate the influence of Cenozoic tectonic activity on shallow hydrocarbon accumulation and transformation in Raoyang Sag of Bohai Bay Basin, fluid-inclusion analysis and test are conducted. Combined with burial history and fault-caprock sealing evaluation, hydrocarbon accumulation and tectonic transformation processes are revealed by analyzing the differences in fluid-inclusion characteristics in shallow reservoirs. The results show that, although 2 major late-Cenozoic tectonic events caused local anomalies in fluid-inclusion signatures, 3 stages of hydrocarbon charging were still identified in shallow reservoirs, corresponding to fluid-inclusion fluorescence colours of yellow(80～90 ℃), yellow-white to yellow-green(90～120 ℃) and blue-green(120～140 ℃). Dongying Formation exhibits continuous charging during stages Ⅰ, Ⅱ and Ⅲ, while Guantao Formation reservoirs are mainly charged during stage Ⅱ, lacking low-maturity(stage I) and mature(stage Ⅲ) hydrocarbon charging. Hydrocarbon in Dongying Formation accumulated mainly via Paleogene-Neogene active oil-source faults that connected the underlying Shahejie Formation source rocks, undergoing 2 significant transformation events. Guantao Formation reservoirs originated from leakage and re-accumulation of Dongying Formation hydrocarbons at 12 Ma. Reservoir distribution is mainly controlled by fault-sealing zones where top fault-caprock thickness of Dongying Formation is less than 62 m. The research provides theoretical support for achieving breakthroughs in full-sequence hydrocarbon exploration throughout Jizhong Depression.

关键词(KeyWords)： 流体包裹体;油气成藏;构造活动;东营组―馆陶组;饶阳凹陷
fluid inclusion;hydrocarbon accumulation;tectonic activities;Dongying-Guantao Formations;Raoyang Sag

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“低勘探程度凹陷油气成藏条件与突破方向”（2024ZD1400106）

作者(Author): 李熹微,陈柯童,张海鑫,赵懿,李雅雯,焦亚先,温馨,李依航,陈昉,刘宗堡
Li Xiwei,Chen Ketong,Zhang Haixin,Zhao Yi,Li Yawen,Jiao Yaxian,Wen Xin,Li Yihang,Chen Fang,Liu Zongbao

DOI: 10.19597/J.ISSN.1000-3754.202503018

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