琼东南盆地宝岛—长昌凹陷三亚组三角洲—深水扇发育特征与物源分析

发布时间：2018-12-12 23:38

【摘要】：应用新采集的2D/3D地震数据和测录井资料,并结合前人研究成果,分析了宝岛—长昌凹陷三亚组三角洲—深水扇沉积体系的演化特征与分布规律,探讨了其物源特征及发育控制因素。研究表明:宝岛—长昌凹陷三亚组发育2个三角洲—深水扇沉积体系,凹陷中央发育一个大型深水扇。宝岛凹陷北坡三角洲沿北西—南东向展布,形态特征为南西窄、北东宽,面积约6 000km2,长昌凹陷北坡三角洲沿近南北向展布,面积约2 900km2,三角洲沉积物来源主要为海南岛地区。2个三角洲前缘位置均发育深水扇,展布方向与上游三角洲大致相同;宝岛—长昌凹陷中央发育一个呈"纺锤形"东西向展布的大型深水扇,面积约1 760km2,沉积物来源为长昌凹陷东侧隆起区。沉积体系的发育控制因素主要有构造运动、古地貌、物源供给量等。三角洲—深水扇沉积体系的发现,将为宝岛—长昌凹陷深水区中层油气勘探提供科学依据。
[Abstract]:Based on the newly acquired 2D/3D seismic data and logging data and combined with previous research results, the evolution and distribution of deltaic deep-water fan sedimentary system in Sanya formation of Baodao Changchang depression are analyzed. Its provenance characteristics and developmental control factors were discussed. The results show that two delta-deep-water fan sedimentary systems are developed in the Sanya formation of Baodou-Changchang depression and a large deep-water fan is developed in the center of the sag. The north slope delta of Baodao sag distributes along the NW-SE direction, and its morphological characteristics are narrow in the south west, wide in the north and about 6 000 km2 in the north slope of Changchang sag, and the delta in the north slope of Changchang sag distributes along the north-south direction with an area of about 2 900km2. Deepwater fan is developed in the front of the two deltas, and the distribution direction is similar to that of the upper delta. A large deep-water fan with a spindle-shaped east-west distribution is developed in the center of Baodao Changchang Sag, with an area of about 1760 km ~ 2. The sediment originates from the eastern uplift of Changchang Sag. The main factors controlling the development of sedimentary system are tectonic movement, paleogeomorphology, material supply and so on. The discovery of deltaic-deep water fan sedimentary system will provide scientific basis for the exploration of deep water oil and gas in deep water area of Baodao-Changchang depression.
【作者单位】：甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室;中国科学院大学;中海油研究总院;
【基金】：国家科技重大专项(编号:2016ZX05026-007-005)资助
【分类号】：P618.13

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