利用介质的物理参数判断其含油性的实验

Experiment on judging the oil-bearing character using the physical parameters of medium,

本文以大理岩、木材、原油、黄蜡为材料,制作了三种不同的模型。在介质裂隙、孔隙中充油或将油均匀地混合在介质中构成三种含油模式。在实验室内使用超声模拟方法作了介质含油量与震波运动学和动力学特征以及与介质电阻率之间的关系的实验。实验结果说明,当介质含油时,随着介质含油量的增加,震波的振幅逐渐减小,介质的电阻率值则逐渐增大,P波、S波的速度呈现下降趋势,震波的功率谱和振幅谱的主频f_0分裂成f_1、f_2两个主频,其中反映介质含油情况的主频f_1对应的振幅值和功率值逐渐增大。上述物理参数的变化规律与含油介质的性质及含油方式无关,只依赖于介质的含油量。

Three different models were made of marble, wood, yellow wax and crude oil. Crude oil was filled in fractures and pores, or mixed uniformly with medium to form three kinds of oil-bearing patterns. Experiments on the relations between wave kinematic character, wave dynamic character or medium resistivity and oil content in medium were accomplished using ultrasonic modeling method in laboratory. The experimental results say that when oil content in medium increases: ·the amplitude of seismic wave attenuates gradually; ·the resistivity of medium increases gradually; ·both P-wave velocity and S-wave velocity tend downwards; ·dominant frequency f_0 in power and amplitude spectia cf seismic wave splits into two dominant frequencies f-1 and f_z; besides, the amplitude and power tend upwards which are relevant to f-1 that reflects oil content in medium. The variation regularity of these physical parameters depends on oil content in medium instead of meium character and oil-bearing pattern.