摘要
利用岩心、测井及地震等资料,对塔南凹陷南屯组(K1n)沉积类型、分布特征进行了详细研究。结果表明,K1n主要发育近岸水下扇、远岸水下扇和湖泊等3种沉积体系。近岸水下扇主要发育在凹陷东部控盆断裂的下降盘一侧,在盆地东南、东北部形成了2套规模较大、相对独立的朵状扇体,而在中央断裂低洼处发育远岸水下扇沉积体系。由于控盆断裂活动的差异,影响了东南、东北物源供给的速度,导致东南部扇体发展和消失速度均略早于东北部扇体。
Based on the core,well logging and seismic data,the sedimentary type and its distribution characteristics of Nantun Formation(K1n)were systematically studied.The results showed that in Nantun Formation there developed nearshore subaqueous fan,far-shore subaqueous fan and lacustrine depositional systems.The near-shore subaqueous fan was concentrated on the downthrown side of the basin controlling fault in the east part of the depression,there formed two larger and relatively independent lobate fan in the southeast and northeast parts,while far-shore subaqueous fan was developed in the central fault area.Owning to the difference of episodic activities of the basin controlling fault it affects the source supply in the southeast and northeast parts,the velocity of fan development and disappear in the southeast is little earlier than that in the northeast part.
出处
《长江大学学报（自科版）（中旬）》
2016年第6期13-17,3-4,共5页
Journal of Yangtze University(Nature Science Edition)
基金
中国石油天然气股份有限公司重大科技专项(2011E-1202)
关键词
塔南凹陷
南屯组
近岸水下扇
远岸水下扇
沉积特征
Tanan Depression
Nantun Formation
near-shore subaqueous fan
far-shore subaque-ous fan
sedimentary characteristics
favorable oil-bearing facies belt
