准噶尔盆地南缘中段紫泥泉子组三段物源体系分析

准噶尔盆地南缘中段紫泥泉子组三段(E1-2z3)储集性能好,是本区油气勘探的重要层段。储层的分布与物源有密切的成生联系,物源体系分析是油气勘探的一项重要工作。本文基于研究区内钻井和野外露头剖面的重矿物资料,对重矿物含量变化及平面分布特征进行分析,划分出不同的重矿物分区,同时对工区内钻井的砂砾岩厚度进行统计,并分析其在平面上的展布特征,确定了准噶尔盆地南缘紫泥泉子组三段物源体系,为下一步沉积体系的精细研究和储层预测奠定了基础。

A material source system analysis of the 3rd Member of Ziniquanzi Formation in the central part of southern margin of Junggar Basin

In the central part of southern margin of Junggar Basin, the 3rd Member of Ziniquanzi Formation(E_(1-2)z~3) characterized by fine accumulation properties is an important oil and gas exploration horizon. There exists intimate relationship between the reservoir distribution and the material sources, and hence the material source system analysis is a key to hydrocarbon exploration. In this paper, an analysis of heavy minerals and a division of their assemblages were carried out for well data and field sections according to their type, quantity variation and distribution in the study area. In addition, statistics of sand and conglomerate thicknesses as well as their spatial distribution characteristics were studied. It is found that there exist four material source systems in the 3rd Member of Ziniquanzi Formation in the central part of southern margin of Junggar Basin. The authors' study of the depositional systems and reservoir prediction in this area is of great significance for further researches.