西非宽扎盆地盐下构造特征及成藏条件分析

发布时间：2018-03-14 16:01

本文选题：盐下　切入点：构造特征　出处：《断块油气田》2017年01期 　论文类型：期刊论文

【摘要】：为理清宽扎盆地盐下构造格局,进一步指导该盆地盐下勘探,文中通过对不同构造部位地震剖面的解释,总结了宽扎盆地的盐下构造特征,认为宽扎盆地裂陷期存在一中央隆起带,该隆起带将宽扎盆地分隔为内宽扎次盆和外宽扎次盆,大西洋枢纽断裂是中央隆起带和外宽扎次盆的分界线。在外宽扎次盆,发育多个受断裂控制的次级凸起,已有钻井证实这些凸起为有利的油气聚集区。宽扎盆地的成藏研究结果表明:宽扎盆地盐下成藏条件优越,烃源岩发育在深湖￣半深湖相凹陷内,主要为巴列姆阶湖相泥页岩;储层为Cuvo组碳酸盐岩和砂岩,主要发育在次级凸起和斜坡带上;盖层为阿普特阶盐岩。综合分析认为,紧邻大西洋枢纽断裂西侧的凸起带为宽扎盆地盐下最有利的勘探区带。
[Abstract]:In order to clarify the subsalt tectonic pattern of Kuanza Basin and further guide the exploration of the basin, the characteristics of the subsalt structure of the Kwanza basin are summarized through the interpretation of seismic profiles of different structural positions. It is considered that there is a central uplift zone in the rift period of the Kuanza basin, which divides the Kuanza basin into the inner and outer kwanzaa subbasins. The Atlantic hub fault is the dividing line between the central uplift zone and the outer kwanzaa subbasin. Several secondary uplifts controlled by faults have been developed, which have been proved by drilling to be favorable oil and gas accumulation areas. The results of reservoir formation in Kuanza basin show that the conditions for forming reservoirs under salt in Kuanza basin are superior. The source rocks are developed in deep lake sag, mainly lacustrine shale, carbonate rock and sandstone of Cuvo formation, mainly developed in secondary uplift and slope zone, and the cap rock is About stage salt rock. The protruding zone adjacent to the western side of the Atlantic hub fault is the most favorable exploration zone under salt in the Kwanza basin.
【作者单位】：北京博达瑞恒科技有限公司;中国海洋石油国际有限公司;
【分类号】：P618.13

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