天然气地质学

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

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  • 1.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,甘肃 兰州 730000;
    2.中国科学院大学,北京 100049;3.中海油研究总院,北京 100028
晏英凯(1992-),男,吉林长春人,硕士研究生,主要从事储层沉积学研究.E-mail:yan19920628@sina.cn.

收稿日期: 2017-04-19

  修回日期: 2017-08-11

  网络出版日期: 2017-10-10

基金资助

国家科技重大专项(编号:2016ZX05026-007-005)资助.
 

Study on delta-deepwater fan sedimentary system of Sanya Formationin the Baodao-Changchang Depression,Qiongdongnan Basin

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  • 1.Key Laboratory of Petroleum Resources,Gansu Province/ Key Laboratory of Petroleum Resources Research,
    Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China;
    2.University of Chinese Academy of Sciences,Beijing 100049,China;
    3.CNOOC Research Institute,Beijing 100028,China

Received date: 2017-04-19

  Revised date: 2017-08-11

  Online published: 2017-10-10

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 000km 2,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 760km 2,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。
 

本文引用格式

晏英凯,韩银学,马明,陈国俊,吕成福,杨海长,陈莹 . 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[J]. 天然气地球科学, 2017 , 28(10) : 1565 -1573 . DOI: 10.11764/j.issn.1672-1926.2017.08.004

Abstract

Based on the 2D/3D seismic data,logging data and previous achievements,this paper identifies the evolutions and distributions of the Lower Miocene delta and deepwater-fan depositional system of Sanya Formation in Baodao-Changchang Depression,and analyzes the provenance characteristics and controlling factors of the sedimentary system development.The results show that there are two delta-deepwater-fan sedimentary systems of Sanya Formation in Baodao-Changchang Depression,and a large deepwater-fan developed in the center of the depression;the north slope delta of Baodao Depression,which is narrow in southwest and wide in northeast,is about 6 000km,with a distribution direction of nearly NW-SE.The north slope delta of Changchang Depression is 2 900km2 with a distribution direction of nearly N-S,the sediments of the delta are mainly derived from Hainan Island.The deepwater-fan developed both in the two delta fronts,and the distribution directions are similar to that of the upstream delta.In the center of the Baodao-Changchang Depression,large deepwater-fan with a shape of "spindle" developed,with a distribution direction of E-W and an area of 1 760km2.The main controlling factors affecting the sedimentary evolution of the delta-deepwater-fan sedimentary system are the tectonic movement,the paleo geomorphology,the source supply and so on.The discovery of the delta-deepwater-fan depositional system could provide a basis for deepwater oil-gas exploration in the Baodao-Changchang Depression.
 
 

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