机构地区: 华北油田
出 处: 《测井技术》 1992年第3期177-182,共6页
摘 要: 研究了如何利用井眼中的超声回波信号进行三维超声测井成象的问题。首先,将三维测井成象问题归结为一分布参数系统的参数辨识问题,再应用阶跃梯度分层反演法得出一种快速辨识算法。附有仿真例题。此方法充分利用了回波信号的动态信息,对发射信号无严格限制。 How to acquisite 3-D ultrasonic logging images by using the ultrasonic reflected signals in the boreholes is studied. Firstly, the 3-D logging imagings are reduced to the parameter identification of distributed parameter system. Then, a quick identification algorithm is obtained with the use of the step gradient layered inversion. Finally, a digital simulation example proves the feasibility of the algorithm. This method fully uses the dynamic information of echo signals and has no strict limits to the transmitting signals.