摘要
利用钻/测井、三维地震等资料,在地震资料解释成果的基础上,运用断层活动速率法分析了福山凹陷西部美台断层的活动演化特征。研究发现:美台断层在流沙港二期开始活动,在流沙港二期至一期,断层活动速率达到最高,此后活动性逐渐减小;在空间上,活动强度大的部位随着时间的发展而发生迁移;同一时期断层的不同部位活动强度也具有明显差异,总体表现为在美台断层中部断层活动性最强,而在断层两端活动性相对较弱。结合区域地层总沉降速率和沉积体系分析,初步探讨了断层对凹陷沉降与沉积体系的控制作用。
This paper analyzes the activity characteristics of Meitai fault in west of Fushan Depression with the reference of drill/logging and 3D seismic data, on the basis of interpreted seismic results, and by fault activity ratio analysis methods. Meitai fault started to develop in E2ls2. Its activity was stronger in E21s2 and E2lsl , thereafter the activity gradually decreased. In space, the site with the greatest activity intensity migrated with the time passing by, while fault activity intensity differed significantly in different parts of the study area. Generally speaking, the intensity of fault activity changed in a way of dying down from the middle to the two flanks. We made a preliminary study on the fault controlling effect on basin settlement and sedimentary system types with the combination of basin sedimentation rate and analysis of sedimentary system types and discussed the controlling effect of fault activity on the deposition of sedimentation and sedimentary facies distribution.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第4期51-59,共9页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金(41273001)
关键词
断层活动速率
盆地沉降
美台断层
沉积相
福山凹陷
fault activity
basin settlement
Meitai fault
sedimentary facies
Fushan Depression
