歧南次凹及其邻区古近系物源特征分析  

Provenance Characteristic Analysis in Qinan Subsag and Its Adjacent Paleogene System

作　　者：袁淑琴[1] 王书香[1] 纪建峥[1] 张洪娟 王洪彪[3] 赵宇超[1] 

机构地区：[1]中石油大港油田分公司勘探开发研究院,天津300280 [2]中石油渤海钻探工程有限公司油气合作开发分公司,天津300280 [3]中石油大港油田分公司滩海开发公司,天津300280

出　　处：《石油天然气学报》2013年第10期56-62,6,共7页Journal of Oil and Gas Technology

摘　　要：物源分析是盆地分析的重要内容之一。歧南次凹及其邻区古近系沙河街组三段(Es3)、二段(Es2)沉积时期发育两大物源体系,即盆外的南部埕宁隆起物源,盆内的西部羊三木凸起物源。根据岩石学特征、重矿物组合、砂体分布体系和沟谷体系的分析研究成果,对研究区的物源口进行分解研究,Es3沉积时期细分为4个子物源口,Es2沉积时期细分为6个子物源口。近东西向的层拉平地震剖面显示,4条近南北向展布的沟谷对应发育4大物源通道,沟谷中砂岩发育,砂地比高。该研究成果为该区的古地理重建和有利砂体预测提供了最重要的依据和保障。Provenance analysis was one of the important contents of basin analysis.In the third and second members of Shahejie Formation,there developed two source sedimentary systems in Qinan Subsag and its adjacent area,that was the Chengning uplift source outside the basin and Yangsanmu bulge source inside the basin.Based on the analytical results of petrological characters,heavy mineral assemblage,sandbody distribution system and valley analysis,the source mouth in the studied area was analyzed and studied.For the Es3 sedimentary period,it is divided into four source mouths.For the Es2 sedimentary period,it is divided into six source mouths.The bed flattening seismic profile in the near EW indicates that there develop 4source channels correspondingly in 4valleys distributed to the near SN,in the valleys,sandstone is grown and sand belt is higher.The results provide significant basis for Paleaogeographic reconstruction and favorable sandbody prediction.

关 键 词：古近系 物源特征 歧南次凹 

分 类 号：P618.13[天文地球—矿床学]