巴楚地区基于多重条件下约束下激发参数设计

How choose the mode of the seismic excitation,under the complicated complex geology's shallow layer condition in Tarim basin

塔里木盆地巴楚隆起区地表条件复杂、岩性横向变化大,历年地震资料品质较差.选择激发井深时,应考虑激发岩性、近地表、地震、地质等资料分析地震波的传播速度、传播路径、地震成像等条件对激发的影响进行井深设计.应充分考虑潜水面、虚反射界面、子波形态、低频带等因素对地震资料品质的影响;选择激发药量时,根据地震地质条件选择药量,合理控制岩体动能与传播速度的比率;选择扪井方式时,考虑扪井材料与井壁的耦合关系,选用模量较大、变形较小的封填材料以利于提高激发效果.

The surface condition of the Bachu uplift in the Tarim basin is very complex,for the horizontal lithology is varied.While we designed shoting hole depth,we proceed synthesized shoting hole depth design by analysis of seismic wave propagation velocity,propagation path and seismic imaging accord to near-surface data,seismic data,geological data and so on.Especially to take full advantage of near-surface data,giving sufficient consideration to surface structure,water table,ghosting interface,seismic wavelet,low-frequency belt and other factors that effect the the quality of seismic data.When designing explosive quantity,we chose reasonable dose of explosive accorded to seismic geological condition.To choose sealing well method,we meanly consider the coupling relation between the sealing well materials;sealing material with large modulus and little deformation can improve the blast effect.