冀东高尚堡油田Es_3~(2+3)层序地层学研究

采用地震约束测井、测井标定和校正地震,二者相互动态调整的方法,对冀东高尚堡油田深层地层进行了深入的层序地层学研究:将Es23+3地层划分为1个层序、2个体系域、6个准层序组和16个准层序;总结了层序界面特征,将Es23和Es43顶部大套厚层泥岩作为目的层段层序研究的一般标志层,但是陆相沉积特有的复杂性,使得其识别难度很大;探讨了地层层序特征,认为目的层有两处沉积中心,其总体延伸方向近东西向。下部湖退体系域形成于湖盆收缩期,以G35-1、G62井区和G82井区沉积为中心,地层最厚;上部湖进体系域形成于湖盆大面积扩张时期,其沉积中心(G30-28井区以及G13-13井区)相对于下部体系域两个沉积中心,分别向北和东迁移。

Study on Sequence Stratigraphy of Es_3~(2+3) Formation in Gaoshangpu Oil Field

The sequence stratigraphy of Es~(2+3)_3 formation in Gaoshangpu oil field is deeply studied with the method that seismic data controls well logs data while well logs data calibrates and adjusts seismic data dynamically. The target formation is classified into 1 sequence, 2 system tracts, 6 parasequence sets and 16 parasequences. Then, the features of sequence stratigraphic boundary are concluded. The thick shales on the top of Es~2_3 and Es~4_3 can be regarded as a general index horizon which is hard to recognize because of the complexity of lacustrine formation. And the sequence characteristics is debated that there are two sedimentation centers which prolong proximately eastward. The bottom regressive system tract, whose sedimentation center is well zone G35-1G62 and G82, was formed in the early period of the lake shrinkage; The top transgressive system tract, whose sedimentation center is well zone G30-28 and G13-13, was formed in the later lake extension period, during which the two sedimentation centers migrated northward and eastward.