可控震源和炸药震源在松辽盆地西南部地区的适用性研究

Study on the applicability of controllable source and explosive source in the southwestern area of Songliao Basin

由于松辽盆地西南部地区浅层地表覆盖厚度变化较大,仅使用传统的炸药震源进行施工将面临成孔难度大、危爆物品管控等难题,影响施工效果。通过从多方法多技术的思路出发,对炸药震源和可控震源的单炮记录及叠加时间剖面进行对比,并结合实际工区应用效果,分别分析了它们各自的优缺点及其适用性。结果表明:在松辽盆地西南部地区使用可控震源代替炸药震源进行施工是切实可行的,与炸药震源相比,可控震源具有受外界信号干扰较小、施工简单、可根据不同地震地质条件随时调整激发参数来提高野外数据质量等优点。研究结果对该盆地以后的野外勘探开发工作具有指导意义。

Due to the large variation in the thickness of shallow surface coverage in the southwestern area of Songliao Basin,construction using only traditional explosive source will face difficulties such as difficulty in hole formation and control of hazardous explosive,which will affect the construction effect.Based on the multi-method and multi-technical approach and combination of the actual application effect in the work area,this paper analyzes their respective advantages and disadvantages and applicability by comparing the single shot records and superposition time profiles of the explosive source and controllable source.The result shows that it is feasible to use controllable source instead of explosive source in the southwestern area of Songliao Basin.Compared with explosive source,controllable source has the advantages of less interference from external signals,simple construction,adjusting the excitation parameters at any time to improve the quality of field data based on the different seismic and geological conditions.The research result has a guiding significance for the field exploration and development of the basin in the future.