吐哈盆地台北凹陷勒3区块七克台组沉积相研究

以岩心和测井资料为基础,通过对七克台组岩石相类型、沉积构造、沉积韵律进行研究,确定其为一套近源的浅水湖盆扇三角洲沉积,研究区内主要发育前缘亚相并细分为水下分流河道、前缘席状砂和分流间湾等微相.在此基础上探讨了沉积相带与油气聚集的关系,指出水下分流河道为有利的勘探开发相带.

Study on sedimentary facies of Qiketai Formation of Block Le 3 in Taibei Depression of Tuha Basin

On the basis of core and logging data,this paper researches on the facies symbol of Qiketai Formation of Block Le 3,and gets into the conclusion that it is a suit of fan delta deposit through the analysis on type and distribution of rock facies,sedimentary structures and the response of logging curves.It mainly develops delta front subfacies which are further divided into sub-water distributary channel,delta front sheet sand and inter channel.And then this paper discusses the relationship between sedimentary facies and oil-gas accumulation and points out the advantageous belt of exploration and development,which can provide a geological evidence for stable production of the oilfield.