论文部分内容阅读
在一个已知含油气的陆相沉积盆地中,应用亮点和振幅比的方法检测油气是可行的,前者的关键是对地震波的振幅进行补偿,恢复地震波的真振幅。文中叙述了计算波前扩散补偿因子和地层吸收系数的方法,并提出只要反复调整地层吸收系数,就有可能使波的振幅得到较好的补偿。利用相对振幅比法的关键,在于计算平均相对振幅比,以消除偶然因素的影响,根据平均相对振幅比资料,预测了油气层的分布范围,经钻探证实,是正确的。
In a terrestrial sedimentary basin with a known oil and gas field, it is feasible to detect oil and gas by means of the bright spot and the amplitude ratio. The former key is to compensate the amplitude of the seismic wave and restore the true amplitude of the seismic wave. The method to calculate the wavefront diffusion compensation factor and formation absorption coefficient is described in this paper. It is also suggested that the amplitude of the wave can be well compensated by repeatedly adjusting the formation absorption coefficient. The key to using the relative amplitude ratio method is to calculate the average relative amplitude ratio to eliminate the influence of accidental factors. Based on the data of average relative amplitude ratio, the distribution range of the oil and gas layers is predicted, which is correct after drilling.