【摘要】 滨北地区是目前深层油气勘探的重点区 ,深部油气的形成与基底断裂活动有关 .根据重、磁资料 ,结合部分地震剖面把基底断裂分为三级 .Ⅰ级断裂有 6条 ,属于深大断裂 ;Ⅱ级断裂规模小 ,又称区域性大断裂 ;Ⅲ级断裂规模较小 ,可在地震剖面上反映出来 .基底断裂的展布方向有 4个 ,从老到新依次为北北东向、东西向、北西向、南北向 .滨北地区基底断裂的演化模式有 4种 :(1)东西向的强烈拉张形成北东、北北东向的深大断裂 ;(2 )北东向大断裂的左旋剪切作用形成北东向的Ⅱ级断裂 ;(3)南北向的再次强烈拉张形成近东西向的三条深大断裂 ;(4)东西向断裂的右旋剪切作用形成北西向的Ⅱ级断裂 .即基底构造格局是通过“二张二剪”形成的 .基底断裂控制了滨北地区的侏罗系断陷的分布更多还原

【Abstract】 At present the deep formation of Binbei area is an improtant hydrocarbon exploration part. The formation of the hydrocarbon in the deep is closely associated with the basement fracture. The basement fracture at Binbei area in Songliao Basin can be divided into three different scale types. Six of the largest belong to the deep fracture; the second are regional fractures; the smallest can be interpreted from seismic section. The oriention of them are NNE, EW, NW and NS. The basement fractures are as follows: (1) the fractures of NE trend and the NNE are due to the NNE\|trending strong extention; (2) The NE\|trending left\|shearing results in the formation of the regional fractures; (3) The NS\|trending further strong extension causes three EW\|trending regional deep fractures; (4) The EW\|trending right\|shearing results in NW\|trending regional fractures. Therefore, the tectonic basement framework is formed by twice extending and twice shearing. The basement fractures controlling the spreading of the Juarric faulted depression have good relations with the oil and gas at depth.更多还原