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世界地质 2023, 42(4) 676-690 DOI: ISSN: 1004-5589 CN: 22-1111/P

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	锆石 U--Pb 年龄
	油源对比
	油气勘探方向
	侏罗系塔木兰沟组
	红旗凹陷
	海拉尔盆地
	本文作者相关文章
	吴海波
	侯艳平
	王璞珺
	陈鸿平
	申文静
	彭威
	陈崇阳
	PubMed
	Article by Wu H
	Article by Hou Y
	Article by Wang P
	Article by Chen H
	Article by Shen W
	Article by Peng W
	Article by Chen C

海拉尔盆地红旗凹陷侏罗系油气来源及其勘探意义

吴海波1 , 侯艳平1 , 王璞珺2 , 陈鸿平1 , 申文静1 , 彭威1 , 陈崇阳3

1. 大庆油田有限责任公司勘探开发研究院, 黑龙江大庆 163712;

2. 吉林大学地球科学学院, 长春 130061;

3. 吉林师范大学地理科学与旅游学院, 吉林四平 136000

摘要：为明确海拉尔盆地侏罗系油气来源, 通过岩心和薄片鉴定? 地球化学和锆石 U??Pb 测年分析, 对红旗凹陷侏罗系进行了岩性和时代校正, 明确地层年代和归属; 通过饱和烃气相色谱和色谱质谱分析, 开展油源对比, 明确油气来源? 结果表明: 红旗凹陷钻遇的一套原为下白垩统铜钵庙组的饱含油砂砾岩层, 其岩性应为粗面质火山角砾岩, 年龄为 (146. 90 ± 0. 93) Ma, 应归属于晚侏罗世? 侏罗系油气来源有两种: ①油气层下部的侏罗系源岩, 与油气层构成下生上储成藏模式; ②油气层侧向的白垩系源岩, 构成上生下储? 侧向运移模式? 其上生下储模式说明上覆白垩系源岩具有向下伏侏罗系储层供烃成藏的可能性和普遍性? 在以往侏罗系油气勘探以寻找自生自储和下伏源岩为主要方向的基础上, 兼顾上覆白垩系源岩与下伏侏罗系储层的成藏匹配关系, 可为侏罗系油气勘探提供新思路?

关键词：锆石 U--Pb 年龄油源对比油气勘探方向侏罗系塔木兰沟组红旗凹陷海拉尔盆地

Hydrocarbon source in Jurassic and its exploration significance in Hongqi Sag, Hailar Basin

WU Haibo 1 , HOU Yanping 1 , WANG Pujun 2 , CHEN Hongping 1 , SHEN Wenjing 1 , PENG Wei 1 , CHEN Chongyang 3

1. Exploration and Development Research Institute of Daqing Oilfield Company Ltd., Daqing 163712, Heilongjiang, China;

2. College of Earth Sciences, Jilin University, Changchun 130061, China;

3. College of Geographical Science and Tourism, Jilin Normal University, Siping 136000, Jilin, China

Abstract: To clarify the hydrocarbon source in the Jurassic deposits of the Hailar Basin, the authors have conducted lithological and chronological corrections through borehole core and thin section identification, geochemi? cal analysis, and zircon U??Pb isotopic dating, to determine the stratigraphic age and attribution. Furthermore, an oil?source correlation was carried out using saturated hydrocarbon gas chromatography and gas chromatography?mass spectrometry to identify the hydrocarbon source. The results indicate that the oil?bearing sandy conglomerate layer encountered in the drill holes in Hongqi Sag, formerly attributed to the Lower Cretaceous Tongbomiao Formation is acturally trachytic breccia with an age of (146. 90 ± 0. 93) Ma, belonging to the Late Jurassic. There are two sources for the hydrocarbons in the Jurassic layer. The first is the Jurassic source rock located in the lower part of the hydrocarbon layer, forming a model of lower generation and upper storage. The second is the Cretaceous source rock in a lateral direction migrated to the Jurassic conglomerate layer, forming a model of upper generation, lower storage, and lateral migration. The upper generation with lower storage model indicates that the Cretaceous source rock has the potential to supply hydrocarbons and accumulate them in the underlying Jurassic reservoirs. In addition to the previous exploration focus on Jurassic intra?group and underlying source rocks, new insights for Jurassic hy? drocarbon exploration have been provided on the basis of the matching between overlying Cretaceous source rocks and underlying Jurassic reservoirs.

Keywords: zircon U--Pb age oil?source correlation hydrocarbon exploration direction Jurassic Tamulangou Formation Hongqi Sag Hailar Basin

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