东营凹陷边界断层活动性与沉积演化耦合关系的量化表征

基于边界断层组合样式及演化特征的分析,利用新方法量化表征边界断层活动性特征,并从微观-宏观角度分析边界断层活动性对沉积的控制作用,最终建立基于断层活动性的沉积模式量板。结果表明:东营凹陷北带沙四期边界断层活动性自西向东具有弱—强弱交替—强的变化特征;微观上,边界断层活动性控制形成了稳定-富物源型、动荡-富物源型、稳定-贫物源型和动荡-贫物源型4种沉积环境;宏观上,边界断层活动性与沉积厚度呈正相关关系,与推进距离呈负相关关系;微观与宏观上相结合,可以建立基于断层活动性的沉积模式识别量板,明确边界断层活动性与陡坡带沉积演化的耦合关系。

Quantitative research of coupling relationship between boundary fault activity and sedimentary evolution in Dongying Depression

Based on the analysis of the combination patterns and evolution characteristics, the boundary fault activity in Dongying Depression was studied quantitatively using a new method. The relationship between the boundary fault activity and the depositing process was analyzed at the micro to the macro level, and the depositional models template based on fault activity was built. Results show that the activity of boundary fault in Dongying Depression has "weak-alternating strength-strong" characteristics from west to east. At the microscopic level, boundary fault activity controls the four types of sedimentary environment:"stable-rich source", "unstable-rich source", "stable-poor source", and "unstable-poor source". At the macro level, the boundary fault activity has a positive correlation with the sedimentary thickness and negative correlation with forward distance. Combining both microcosm and macrocosm, the depositional models template was built based on boundary fault activity, and the coupling relationship between boundary fault activity and steep slope sedimentary evolution has been defined quantitatively.