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大型走滑转换带对油气分布差异性控制作用: 以西非科特迪瓦盆地为例

饶勇 程涛 赵红岩 李全 吕彩丽 刘正

饶勇, 程涛, 赵红岩, 李全, 吕彩丽, 刘正. 大型走滑转换带对油气分布差异性控制作用: 以西非科特迪瓦盆地为例[J]. 地质科技通报, 2024, 43(3): 108-119. doi: 10.19509/j.cnki.dzkq.tb20230119
引用本文: 饶勇, 程涛, 赵红岩, 李全, 吕彩丽, 刘正. 大型走滑转换带对油气分布差异性控制作用: 以西非科特迪瓦盆地为例[J]. 地质科技通报, 2024, 43(3): 108-119. doi: 10.19509/j.cnki.dzkq.tb20230119
RAO Yong, CHENG Tao, ZHAO Hongyan, LI Quan, LÜ Caili, LIU Zheng. Role of the large-scale strike-slip transform zone in controlling the differential hydrocarbon distribution: A case of the Côte d'Ivoire Basin in West Africa[J]. Bulletin of Geological Science and Technology, 2024, 43(3): 108-119. doi: 10.19509/j.cnki.dzkq.tb20230119
Citation: RAO Yong, CHENG Tao, ZHAO Hongyan, LI Quan, LÜ Caili, LIU Zheng. Role of the large-scale strike-slip transform zone in controlling the differential hydrocarbon distribution: A case of the Côte d'Ivoire Basin in West Africa[J]. Bulletin of Geological Science and Technology, 2024, 43(3): 108-119. doi: 10.19509/j.cnki.dzkq.tb20230119

大型走滑转换带对油气分布差异性控制作用: 以西非科特迪瓦盆地为例

doi: 10.19509/j.cnki.dzkq.tb20230119
基金项目: 

中国海洋石油有限公司“十四五”重大科技项目“两岸一带”重点盆地油气富集规律和成藏差异性研究 KJGG2022-0901

详细信息
    通讯作者:

    饶勇, E-mail: raoyong@cnooc.com.cn

  • 中图分类号: P618.13

Role of the large-scale strike-slip transform zone in controlling the differential hydrocarbon distribution: A case of the Côte d'Ivoire Basin in West Africa

More Information
  • 摘要:

    科特迪瓦盆地位于西非赤道段, 发育大型走滑转换带, 为典型的转换型被动陆缘盆地, 是当前油气勘探热点区域, 勘探潜力巨大, 但油气平面分布、纵向富集均存在较大的差异性。基于前人研究, 利用井、震资料并结合近年来新发现油气藏数据, 重点从构造和沉积2个方面阐述了走滑转换带对油气分布差异性的控制作用。研究表明, 盆地经历了陆内裂谷、洋陆转换和被动陆缘3个主要的构造-沉积演化阶段, 形成了总体上"西窄东宽"的斧型构造格局特征, 西部为陡窄转换边缘, 东部为宽缓离散边缘, 中部为过渡边缘, 宏观上控制了油气"西少东多"的分布规律。走滑转换作用应力主要响应区为中部过渡边缘, 中部隆起马尾带发育大量的构造圈闭, 具有南北双向供烃特征, 控制了北部凸起阿尔比构造油气藏的形成与分布。走滑转换作用形成的古地貌对转换早期上阿尔比-森诺曼和转换晚期土伦阶储层的空间展布特征均有重要的控制作用, 内斜坡洼陷(盆地)往往是最为有利的富砂处, 同时也是最有利的地层-岩性圈闭发育区, 油气分布与沉积体系展布具有较好的一致性, 即转换控储, 分布控藏。

     

  • 图 1  科特迪瓦盆地构造位置图(a)和布格重力异常图(b)

    Figure 1.  Tectonic location (a) and bouguer gravity anomaly map (b) of the Côte d′Ivoire Basin

    图 2  科特迪瓦盆地综合柱状图

    Figure 2.  Comprehensive stratigraphic column of the Côte d′Ivoire Basin

    图 3  科特迪瓦盆地裂谷期构造单元划分平面图

    Figure 3.  Tectonic units division in rifting section of the Côte d′ Ivoire Basin

    图 4  科特迪瓦盆地边缘演化地质剖面示意图(左.转换边缘; 右.离散边缘,据文献[25]修改)

    Figure 4.  Evolution profile at margin of the Côte d′ Ivoire Basin

    图 5  科特迪瓦盆地中部过渡边缘典型地质剖面(a)(剖面A-A′位置见图 3)和WA油藏成藏模式图(b)(油藏位置见图 3)

    Figure 5.  Typical geological profile of the transitional margin in the central Côte d′Ivoire Basin (a) and hydrocarbon accumulation model of the WA oil reservoir (b)

    图 6  科特迪瓦盆地中部过渡边缘油气成藏模式图

    Figure 6.  Hydrocarbon accumulation model of the transitional margin in the central Côte d′ Ivoire Basin

    图 7  科特迪瓦盆地走滑转换带对沉积控制作用模式图

    Figure 7.  Sedimentary model controlled by strike-slip transform zone of the in the central Côte d′ Ivoire Basin

    图 8  科特迪瓦盆地中-东部地区沉积相图

    Figure 8.  Sedimentary facies map in the central-eastern Côte d′ Ivoire Basin

    图 9  科特迪瓦盆地转换晚期土伦时期沉积模式图

    Figure 9.  Turonian sedimentary model in the late transform stage of the Côte d′Ivoire Basin

    图 10  2种类型斜坡剖面及对应模式(a~d)和过Jubilee油藏典型地震剖面(e)(a~d图据文献[40-41]修改;e图中剖面B-B′位置见图 3,拉平土伦阶顶面)

    Figure 10.  Two types of slope profile and corresponding model (a-d) and typical reservoir seismic profile of the Jubilee reservoir (e)

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出版历程
  • 收稿日期:  2023-03-07
  • 录用日期:  2023-10-16
  • 修回日期:  2023-10-12

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