论文部分内容阅读
本文利用全光学方法对不同地区的页岩样本进行各向异性检测.利用激光在页岩等岩石中激发产生超声波,基于激光干涉原理对超声波速进行检测,从而获得页岩层理结构的各向异性分布特点.检测结果表明超声纵波波速与页岩层理结构吻合得很好.超声纵波沿页岩层理面传播时速度最大,垂直页岩层理面传播时速度最小,超声波速关于页岩层理方向以正弦规律对称分布.不同地区的页岩超声波速也不同.全光学检测方法可以实现对页岩层理结构的快速判断,根据在页岩中传播的超声波速可了解页岩的致密度及各向异性强度,对页岩储层的开发具有一定指导意义.
In this paper, the anisotropy of shale samples in different regions is detected by using the all-optical method.Using laser to generate ultrasonic waves in shale and other rocks, the ultrasonic velocity is detected based on the laser interference principle to obtain the anisotropy of shale bedding structure The results show that the ultrasonic longitudinal wave velocity is in good agreement with the shale bedding structure.The ultrasonic longitudinal wave propagates most along shale bedding plane and has the least propagation velocity when the vertical shale bedding plane propagates.The ultrasonic velocity is sinusoidal Regular symmetrical distribution of shales in different regions of the ultrasonic velocity is also different.All optical detection method can achieve rapid judgment of the shale bedding structure, based on the ultrasonic velocity in shale can understand shale density and anisotropy , Which is of guiding significance for the development of shale reservoirs.