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基于盆地结构分析,井-震结合确定沧东—南皮凹陷孔一上亚段残留盆地边界。应用边缘相法和平衡剖面法对孔一上亚段原型盆地边界进行了恢复。综合分析恢复结果表明,沧东—南皮凹陷孔一上亚段地层沉积时期受沧东、徐西断层控制,遭受强烈改造,为后期构造改造的盆地,盆地剥蚀面积大于500km2,剥蚀率高于20%,且原型盆地与残留盆地的边界亦有较大差异。
Based on the structural analysis of the basin and well-seismic combination, the boundary of the residual basins in the Kong-Yilian Member of Cangdong-Nanpi Depression is determined. The marginal phase of the Proterozoic Kong-1 Member basin was restored by the method of marginal facies and equilibrium profiling. The results of comprehensive analysis and restoration show that the sedimentary period of the Chang1-Nanpi depression in Cangdong-Nanpi Depression was under the control of Cangdong and Xuxi faults and was strongly altered. As the basin with later tectonic transformation, the erosion area of the basin is more than 500 km 2 and the erosion rate is higher than 20%, and there is a big difference between the boundary of the prototype basin and the residual basin.