东濮断陷湖盆陡坡带构造演化史恢复研究

陡坡带构造演化史研究对断陷湖盆具有重要意义,平衡剖面技术在面积(体积)守恒的基础上为恢复构造演化史提供了一种科学合理的技术方法。通过对东濮凹陷兰聊陡坡带进行平衡剖面法构造演化史恢复,再现了兰聊断层的活动规律及其对东濮断陷湖盆发展演化的控制作用,明确了东濮凹陷早第三纪层序地层发育特征、坡折带类型及其对砂砾岩扇体的控制作用,指出了隐蔽油气藏发育的有利层段和分布的有利地区。

Restoration of structural evolution of steep slope belt in Dongpu depression

Based on the restoration the structural evolution of Lanliao steep slope zone by the balanced cross section technology in Dongpu depression,it shows activities regulations of the structural evolution in Lanliao fault and its control of the Dongpu depression lake basin.The authors indicate that there are 2 sequences of II level and 6 sequences of III level in Eocene,and there are 5 types of slope break that controlled the position of sand-conglomerate fans.This paper also points out that the suitable oil trap often locates at Sha III member in low upwelling areas of Baimiao,Maogang and in depression areas of Qianliyuan and Pucheng.These studied results have already been used to the petroleum exploration and many of economic benefits have been obtained.