陆相断陷湖盆层序构成样式及砂体预测模式——以南堡凹陷东营组为例

Sequence stratigraphic patterns and sand body prediction models of fault-depressed lacustrine basins:a case study from the Dongying Formation in the Nanpu Sag, Bohai Bay Basin

董月霞 王建伟 刁帆 赵忠新 杜景霞 孟令箭

Dong Yuexia Zhao Zhongxin Wang Jianwei Du Jingxia Meng Lingjian Diao Fan

以渤海湾盆地南堡凹陷东营组为例，通过不同构造带的层序构成样式分析，阐明了陆相断陷湖盆的层序构成样式对砂体分布的控制作用，为陆相断陷湖盆砂体分布预测提供了理论依据。通过南堡凹陷东营组沉积充填时不同构造背景下形成的层序样式及其对储集砂体控制作用的分析，归纳出两种构造背景下的4种层序构成样式，即在北部断坡带构造背景下发育的多断坡带型、单断坡带型和转换带型以及在南部滩海地区斜坡带构造背景下发育的缓坡坡折型。在此基础上，建立砂体预测模式指导储层预测，对确定优质储集体的分布具有指导意义。

Through analysis of sequence stratigraphic patterns in different structural belts, this paper illustrates the control of sequence stratigraphic pattern on sandbody distribution, and provides theoretical evidences for the sandbody prediction in fault-depressed lacustrine basin.Four sequence stratigraphic patterns in two different structural settings are identified based on the analysis of the sequence stratigraphic pattern and its control on reservoir sandbody in different structural settings of Dongying sedimentary period.They include the multiple faulted-slope-zone pattern, single faulted-slope zone pattern and transform zone pattern in the northern fault-break zone setting and the gentle slope-break pattern in the slope structure setting in southern beach area.On this basis, a sandbody prediction model was established to guide reservoir prediction which is of great significance for determining the distribution of favorable reservoir.

10.11743/ogg20150112