大民屯凹陷沙四段层序地层与沉积体系研究

基金项目:

国际科技合作重点项目(2002CB713906)

重大基础研究前期研究专项(2002CCA00700)

Sequence stratigraphy and depositional systems in the fourth member of the Shahejie Formation in the Damintun depression

1. Faculty of Resources and Information, China University of Petroleum, Beijing 102249, China;
2. Dagang Oil Field Branch, PetroChina, Tianjin 300280, China;
3. Liaohe Oil Field Branch, PetroChina, Panjing 124010, Liaoning, China

摘要: 利用岩性、钻井、地震及露头资料,通过对该地区进行层序地层学分析和研究,根据层序界面的识别原则,把大民屯凹陷古近系划分为1个二级层序,两个三级层序。从单井相入手,结合地震相识别出大民屯凹陷沙四段主要发育扇三角洲-湖泊沉积体系和近岸浊积扇-湖相沉积体系,主要发育扇三角洲和湖泊沉积相,局部发育近岸浊积扇。在沉积体系研究的基础上,利用地震反演预测了有利的储集砂体的发育区。
- 大民屯凹陷 /
- 层序地层 /
- 体系域 /
- 沉积体系 /
- 扇三角洲
Abstract: The Palaeogene strata in the Damintun depression may be divided into one second-order sequence and two third-order sequences on the basis of lithologic,well logs,outcrops and seismic data.In the fourth member of the Shahejie Formation in the Damintun depression,the depositional systems include the fan-delta to lake depositional system and the nearshore turbidite fan to lake depositional system,and the sedimentary facies types consist of the fan-delta facies,lake facies,and locally nearshore turbidite fan facies.The favourable areas for hydrocarbon accumulation are delineated by means of seismic inversion based on the research of depositional systems.
- Damintun depression /
- sequence stratigraphy /
- systems tract /
- depositional system /
- fan delta