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论文题目 |
井下前视声波偏移聚焦成像方法 |
论文题目(英文) |
Acoustic imaging system of migration technique used in borehole |
作者 |
林伟军 |
发表年度 |
2008 |
卷 |
33 |
期 |
2 |
页码 |
159-163 |
期刊名称 |
声学学报 |
摘要 |
介绍了一种可用于检测油井套管形态的前视声波成像方法。本方法采用由多个独立阵元组成的面阵式换能器,每个阵元均能独立发射,将所有阵元接收的波形数字化后,采用偏移聚焦成像方法,实现井下油井套管形态的前视声波三维成像.本文对数字偏移聚焦成像的基本原理进行了介绍,并用数值模拟和成像实验进行验证.表明本方法能够在阵元个数有限的情况下得到具有较高分辨率的图像,并可以简化井下仪器的电路结构。 PACS数: 43.35 |
摘要_英文 |
In order to detect the dageof cing borehol,an acollstic imaging method with a two-dimeional ultronic array is presented.Eauch element of the array independently emits down ultronicw;w,the echoreceived by all elements are sampled and tramitted to a computer on ground 8llrface,where the dynic migration method is ed to form a 2 or 3_dimeⅡ8ionalimage of the situatioⅡiⅡthe borehole.The nerical simulation and experiment are conducted that demonstrate a high imaging accuracy with a smaU number of elements used in array. Since the delay circuitsed in the traditional phe array imaging 8ystem i8 not needed iⅡthi8 system,d all data process could be completed in a ground system,the complexity and the volume of system in borehole may be 8ignmcantly simplied,which is critical to the borehole instnlment. |
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