关键词: 东营盆地, 岩性油藏, 三角洲, 古流向

Abstract: Sedimentary fabric analysis shows that middle member Ⅲ of Shahejie Formation (S₃^m) is mainly composed of normal deltafront sediments in this study areas. Magnetic anisotropy measurements were carried out on samples from rotary drilling cores, and the results were used to calculate the direction of paleo-current oriented by magnetic polarity. The distribution of paleo-current, coinciding with the prograding direction of the Dongying Delta from the southeast to northwest, distinctly manifests that in the study areas, X, Y and Z blocks in Dongying depression are directly controlled by Dongying Delta during the sedimentary epoch of S₃^m. The comprehensive analysis on the source and the sedimentary characteristics proves that area of Dongying Delta should be expanded. Thus, there will be widening area in the Dongying Delta inferred to be further prospect of lithological oil pool exploration. The method shown in this paper could be a new way to analyze the paleocurrent in paleo-limnological delta and will provide new scientific data to serve the petroleum exploration.

Key words: Dongying depression, lithological oil pool, delta, paleo-current