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为解释断层下降盘浊积砂体横向不均一的控制机理,从河125断层几何特征入手,剖析了断层形态与浊积砂体的关系,发现弧形断裂平行于断层走向剖面上为断槽、断脊组合;在垂直于断层走向剖面上断层可分为竖滑段、倾滑段和平滑段三段。生长指数规律为弧中大于弧翼;H/L指数为弧中小于弧翼。断裂的几何学特征与动力学、运动学特征具有相关性,断裂不同位置几何学特征的不同反映了断裂动力学、运动学特征的差异。断层对浊积岩具有重要的控制作用:弧中对应浊积扇最发育区,弧翼为不同浊积扇的分界线;断槽为浊积砂体的补给通道;断脊为扇体不同补给区的分水岭,形成了典型的弧扇对应现象。
In order to explain the control mechanism of lateral heterogeneity of turbidite sand body in the descending plate of fault, the relationship between fault shape and turbidite sand body was analyzed from the geometry of He 125 fault. It was found that the arcuate fault was parallel to the strike of the fault, Broken ridge combination; in the direction perpendicular to the fault strike section, the fault can be divided into vertical section, dip section and smooth section. The law of growth index is larger than the arc in the arc; H / L index is less than the arc in the arc. The geometric characteristics of faults are related to kinetic and kinematic characteristics. The differences of geometric characteristics at different locations of fracture reflect the differences in fracture dynamics and kinematics. Faults have important control over turbidite: the most developed zone of turbidite fan in the arc, the arc wing is the dividing line of different turbidite fans; the fault channel is the recharge channel of turbidite sand body; The watershed watershed, forming a typical arc fan corresponding phenomenon.