东濮凹陷兰聊断层的分段特征及其石油地质意义

对兰聊断层不同地质时期的垂直位移沿走向分布特征的分析结果表明,其主演化期内表现出很强的分段性,沙四期是初始分段期,沙三期分段作用最为强烈,兰聊断层分解为3个断层段,各断层段表现出独立正断层的位移分布特征;沙二—东营期是断层的连锁期,兰聊断层南北形成统一的动力学系统.兰聊断层的分段作用使其形成横向褶皱,向斜形成于局部位移极大处,位于断层段中央附近;背斜位于断层段连接处,是断层位移局部极小处;兰聊断层早、中期分段和晚期连锁对东濮凹陷沉积作用、油气聚集有重要影响.

Segmentation characteristics of Lanliao Fault in Dongpu Depression

The analysis on along_strike displacement of Lanliao Fault in different epochs of Eogene indicates that Lanliao Fault has a great segmentation.Es 4 period is intiative,and Es 3 is its main segmental phase.The fault consists of three segments,and each shows the features of displacement distribution of individual normal fault.The segments in Es 2_Dongying period were linked together dynamically.Segmentation of Lanliao Fault produced transverse folds in the fault.The synclines were formed in the maximum displacement and located near the center of the fault segment,and the anticlines located in the minimum displacement and beside the linkage of segments.Its segmentation in the early and middle periods and linkage in the later period have great influences on sedimentation and hydrocarbon accumulation in Dongpu Depression.