【摘要】 针对RVSP勘探存在的既要获得高的地震波能量,又要保证油井套管不被炸坏的矛盾,在理论分析的基础上,使用AUTODYN数值仿真软件,研究了油井材料对炸药能量传递的影响,得到了距离震源10m处的质点振动速度和压力变化曲线;分析了炸药震源半径与油井套管的变形的关系;讨论了炸药震源长度与其能量传递以及油井套管变形的关系。开展了相应的实验研究,数值仿真与实验结果吻合较好。研究结果可以为RVSP勘探的工程应用提供参考和依据。更多还原

【Abstract】 To achieve that a dynamite source should provide high seismic energy without destroying the oil well in the reversed vertical seismic profile(RVSP) prospecting of petroleum,theoretical analysis was carried out for the energy transfer of the dynamite source and finite element models were developed for the dynamite source and its surrounding media in the oil well.Numerical simulations were conducted by applying the AUTODYN-2 Dsoftware to explore the interaction between the oil well and the dynamite source.The vibration velocity and pressure curves were obtained for the particle located 10m away from the seismic source to investigate the influences of the media in the oil well on the energy transfer of the dynamite source.Effects of the charge diameters on the deformation of the oil well pipe were analyzed.And some discussion was made on the effects of the charge length on the energy transfer of the dynamite source and the deformation of the oil well pipe.The corresponding experiment was implemented to compare with the numerical results.The numerical results are consistent with the experimental observations.The research can provide help for the engineering application of the RVSP prospecting.更多还原