| 带扇形窜槽的套管井声场 |
| |
| 引用本文： | 林伟军, 张澄宇, 张海澜, 王秀明. 带扇形窜槽的套管井声场[J]. 声学学报, 2005, 30(1): 9-14. DOI: 10.15949/j.cnki.0371-0025.2005.01.002 |
| |
| 作者姓名： | 林伟军 张澄宇 张海澜 王秀明 |
| |
| 作者单位： | 中国科学院声学研究所,北京,100080;澳大利亚科学技术研究院,澳大利亚,WA6102 |
| |
| 基金项目： | 国家自然科学基金资助项目(19974059)国家自然科学基金重点资助项目(10134020) |
| |
| 摘 要： | 首次使用2.5维的有限差分算法对带窜槽的套管井声场进行了数值研究,计算得到了带有不同大小窜槽套管井的声场展开图及井轴上不同源距的接收波列。本文还应用2维谱的方法对带窜槽的套管井声场进行了分析研究。发现窜槽的存在影响了纵波头波的速度,其大小决定纵波头波的幅度。并且只有当窜槽形成角度大于30°时,才能从接收波列中被鉴别。
|
| 收稿时间： | 2003-04-22 |
| 修稿时间： | 2003-07-24 |
Acoustic field in a cased well with a sectorial crossing channel |
| |
| LIN Weijun, ZHANG Chengyu, ZHANG Hailan, WANG Xiuming. Acoustic field in a cased well with a sectorial crossing channel[J]. ACTA ACUSTICA, 2005, 30(1): 9-14. DOI: 10.15949/j.cnki.0371-0025.2005.01.002 |
| |
| Authors: | LIN Weijun ZHANG Chengyu ZHANG Hailan WANG Xiuming |
| |
| Abstract: | To study the possibility of detecting the crossing channel by using a traditional logging tool, acoustic field generated by a monopole source in a cased well with a crossing channel of various angles is simulated by 2.5-D finite difference method for the first time. Snapshots of normal stress and synthetic time-domain waveforms are displayed. The two-dimensional spectrum in wave-number and frequency domains is also calculated, where the influence of the channel is clearer than that in the waveforms. Numerical study demonstrated that a crossing channel can be detected and sized if its angle is greater than 30 degree, and larger offset and lower frequency source are favorable to detect and size the crossing channel. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《声学学报》浏览原始摘要信息 |
|
点击此处可从《声学学报》下载全文 |
|
