安棚油田H_3IV2^(1—3)油层高分辨率层序地层特征

High-resolution sequence stratigraphy characteristics of H_3IV2～(1-3) oil layers in Anpeng Oilfield

以高分辨率层序地层学理论为指导,对泌阳凹陷安棚油田核三段IV油组21—23(H3IV21—3)小层进行层序地层分析。在层序界面和地层叠加样式研究的基础上,在该层段识别出2个级次(1个中期和6个短期)的基准面旋回,进而以短期基准面旋回为单元建立研究层段的等时层序地层格架,并以此在格架内讨论了研究层段的沉积演化规律。

Sequence stratigraphy analysis has been done in the horizon of H_3IV2～(1-3)in Anpeng Oilfield based on the high-resolution sequence stratigraphy.After the sequence boundary and stacking pattern of horizon were studied,1 medium-term base-level cycles and 6 short-term base-level cycles have been identified.And short-term base-level cycles were divided into three basic structure types.The reservoir synchronous framework has been established.Then the evolvement of the sedimentation was discussed in study horizon.