西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (2): 31-35.DOI: 10.3863/j.issn.1674-5086.2009.02.008

• 地质勘探 • 上一篇    下一篇

陈家洼陷沙三下亚段层序地层和沉积相分析

范春花1,2 王英民1,2 陈振岩3 张文明1,2   

  1. 1.中国石油大学资源与信息学院,北京 昌平 102249; 2.中国石油天然气集团公司物探重点实验室,北京 102249;3.中国石油辽河油田分公司勘探开发研究院,辽宁 盘锦 124010
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-04-20 发布日期:2009-04-20

SEQUENCE STRATIGRAPHY AND SEDIMENTARY FACIES OF THE SHA 3 LOWER SUBINTERVAL IN CHENJIA DEPRESSION

FAN Chun-hua1,2 WANG Ying-min1,2 CHEN Zhen-yan3 ZHANG Wen-ming1,2   

  1. 1.Faculty of Natural Resource & Information Technology,China University of Petroleum,Changping Beijing 102249,China;2.Key Laboratory for Geophysical Prospecting,CNPC,Beijing 102249,China;3.Exploration and Development Research Institution of Liaohe Oilfield,Panjin Liaoning 124010,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-04-20 Published:2009-04-20

摘要:

辽河西部凹陷陈家洼陷具备形成良好隐蔽圈闭的石油地质条件。在综合分析地震、钻井、测井和岩芯等各种资料的基础上,对陈家洼陷沙三下亚段进行了高精度层序地层和沉积相研究,并结合区域构造和成藏地质条件分析,进行隐蔽圈闭预测。结果表明,陈家洼陷沙三下亚段可划分为3个四级层序,并在四级层序内部以最大水进面为界,识别出水进体系域和高位体系域;陈家洼陷沙三下亚段发育4种主要的沉积相类型:扇三角洲、近岸水下扇、湖泊及深水重力流沉积;受断裂体系和古地貌的控制,该区北部发育扇三角洲—浅湖—深湖(半深湖)沉积体系,南部主要发育近岸水下扇—深湖(半深湖)沉积体系;根据沉积相的平面展布及演化特征,结合隐蔽圈闭成藏地质条件分析,提出了1个发育扇三角洲前缘砂体上倾尖灭型隐蔽圈闭的有利勘探靶区。

关键词: 陈家洼陷, 层序地层, 沉积相, 辽河西部凹陷, 隐蔽圈闭

Abstract:

There is a good oil geological condition in the Sha 3 lower subinterval in Chenjia Depression,western Liaohe Sag.Based on seismic,drilling,logging and core data,combined with the distribution of depositional systems and oil geological condition analysis,the sequence stratigraphy and sedimentology characteristics of the Sha 3 lower subinterval are researched to predict favorable subtle traps.The conclusions are as the following,the Sha 3 lower subinterval can be divided into three four-order sequence,and fourth-order sequences are further divided into transgressive and highstand system tracts,there are four kinds of sedimentary systems identified in thtarget layers,including fan delta,nearshore subaqueous fan,lacustrine and deep lacustrine turbidity sedimentary systems,controlled by fault systems and palaeogeomorphy,there are two depositional systems,i.e.,fan delta-shallow lacustrine-deep(hemideep) lacustrine in northern area and nearshore subaqueous fan- deep(hemideep) lacustrine in Southern area,finally,according to the plane distribution,evolvolution features of sedimentary systems and the subtle pool-forming condition,a potential exploration prospect is proposed,which is formed by fan delta front updip pinchot.

Key words: Chenjia Depression, sequence stratigraphy, sedimentary facies, West Liaohe Sag, subtle trap

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