摘要
对穿过青东地区新生代主要断层的地震测线进行了详细的解释和分析,以了解该区断层的发育演化特征及其对沉积的控制作用。结果表明:青东地区新生代主要发育北西、近东西、北北东、北东(东)走向断裂;北西及多数近东西向断层在新生代继承性活动,在孔店组沉积时期活动最强烈,同时控制了孔店组—沙四段沉积时期北西向盆地格局以及孔店组残留厚度最大、沙四段减薄的沉积特征;北东(东)向断层大多形成于古近纪,在沙四段沉积时期强烈活动,并控制了沙三段沉积时期以及之后北东(东)向盆地格局、与沙三段相比沙四段残留厚度有所增大(小于孔店组)、沙二段继续减薄、沙一段—东营组缺失的沉积特征;自下而上残留厚度最大地区逐渐向北迁移,地层展布方向具有由孔店组—沙四段—沙三段—沙二段由北西向—近东西向—北东东向—北东向逐渐变化的趋势。
In order to investigate the development characteristic of Cenozoic faults and its influence on the deposition in Qingdong area,several seismic sections cutting the main faults area were interpreted and analyzed in detail.The study results show that there are four fault groups,which are NW,nearly EW,NNE and NE(E) trend since Cenozoic in Qingdong area.NW and mostly EW trend faults continue its activities and peaked in Ek periods,in the meantime,they have controlled the NW trend basin pattern in Ek-Es4 periods and the sedimentary characteristics with largest residual thickness in Ek periods and thinning in Es4 periods.NE,NE(E) trend faults mainly formed in Paleogene and peaked in Es4 periods,and controlled the NE(E) trend basin pattern since Es3 periods and sedimentary characteristics with higher Es4 residue thickness compared to in Es3 periods (less than Ek),continually thinning in Es2 periods,and hiatus in Es1 to Ed periods.The thickest residual depositional area gradually migrated northwards,with the strata distribution showing a gradual trend from the NW-near EW to NEE-NE from the Ek-Es4 to Es3-Es2 periods.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第4期13-16,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"渤海湾盆地精细勘探关键技术"(2008ZX05006)
关键词
断层
发育特征
控制作用
新生代
青东地区
fault
development characteristics
fault drop
Cenozoic
Tanlu fault
Qingdong area
