中文摘要：

近几年鄂尔多斯盆地东南部上古生界陆续发现新的天然气区带,显示出了巨大的勘探潜力,因此对盆地东南部二叠系物源的研究对于确定储集砂体展布规律具有重要价值。以钻测井、岩芯及周边露头资料为基础,通过露头剖面古流向测定、重矿物分析、边缘相分析、相带分析的方法,确定了研究区二叠系的物源方向;研究认为鄂尔多斯盆地东南部二叠系山西组与石盒子组物源可分为北北东、北北西及南部3个方向,以延安为中心区域属于汇水区;山二段南部物源影响范围较大,影响到延安以北区域;盒八段北部物源范围较大,越过了延安,相应的南部物源范围后撤。

英文摘要：

Recent years＇ discovery in the Upper Paleozoic of the southeastern Ordos basin displays great exploration prospects.Therefore,the study on provenance of the Permian in the southeastern Ordos basin is of great importance to confine reservoir distribution rules.Based on data of well drilling,logging and core along with outcrop sections of surroundings,the provenance directions of the Permian were confined by means of paleo-current direction measuring in outcrop sections,heavy mineral test,and marginal facies analysis as well as facies belt explanation.The study shows that the provenance of Shanxi and Shihezi Formations of the Permian in the southeastern Ordos basin can be divided into three directions which are NNE,NNE,and south,while the Yan＇an region being the center of water catchment.The southern provenance of the 2nd Member of Shanxi Formation has a large influence over the northern area to Yan＇an,whilethe northern provenance of the 8th Member of Shihezi Formation affects the area beyond the southern areas to Yan＇an and the southern provenance receded simultaneously.