依据岩心、测井资料 ,采用 T-R旋回划分方法在牛心坨地区下第三系沙四段牛心坨油层识别出 8个T-R旋回 ,建立起该区的层序地层格架。在此基础上开展全区地层对比 ,指出沙四段牛心坨油层总体上是水体加深的沉积序列 ,其有利的含油气层段是层序 , 和 。 According to the core and well logging data, 8 T-R cycles were identified by the method of T-R cycle division in the Niuxintuo reservoir of the Tertiary Shahejie Formation in the Niuxintuo area, and the sequence stratigraphic framework of the area was established. Based on this, the stratigraphic comparison of the whole area is carried out. It is pointed out that the Niuxintuo reservoir in the fourth member of the Shahejie formation is generally a sedimentary sequence with deepening water bodies. The favorable hydrocarbon-bearing intervals are the sequence and.