| 一种过套管双源反激声波测井方法 |
| |
| 引用本文： | 张博,苏远大,唐晓明,祁晓,谭宝海.一种过套管双源反激声波测井方法[J].声学学报,2015,40(6):863-870. |
| |
| 作者姓名： | 张博 苏远大 唐晓明 祁晓 谭宝海 |
| |
| 作者单位： | 1 中国石油大学(华东)地球科学与技术学院 青岛 266580; |
| |
| 基金项目： | 国家青年自然科学基金(41474092,41204070)资助 |
| |
| 摘 要： | 套管井胶结差时,地层声速的测量是一个很重要的测井难题。为解决这一难题,提出了一种过套管双源反激声波测井方法,从数据采集上压制套管波,增强地层波的信噪比。模拟计算了这种情况下双源反激的测井声波波形,并在实验室制作了1:10的套管模型井,进行了物理模拟实验。计算结果表明利用该方法可以有效压制套管波,并能清晰地识别出地层纵波。对实测波形的分析表明,实验条件下采用双源反激方法套管波幅度能够被压制到单源激励时的0.12倍,有效提高了地层波的信噪比,并能有效提取地层波的速度。理论和物理模拟结果验证了该方法的可行性,为其工程应用奠定了基础。
|
| 收稿时间： | 2014-07-09 |
A cased-hole acoustic logging technique using the dual source of opposite polarity |
| |
| Affiliation: | 1 College of Geosciences, China University of Petroleum Qingdao 266580;2 China Research Institute of Radiowave Propagation Xinxiang 453003 |
| |
| Abstract: | It is usually difficult to measure acoustic velocity through casing, especially when the casing is poorly bonded with formation. An acoustic logging technique using the dual source of opposite polarity is proposed to enhance the Signal to Noise Ratio of the formation signal while reducing casing wave in the data acquisition process. In what follows, theoretical modeling is used to caculate the wavefroms of cased wells. Then a scaled experiment was conducted in the 1:10 scaled experimental well using the technique in the poorly bonded condition. The results show that this technique can effectively suppress casing wave and enhance formation wave, even in the poorly bonded condition. By analyzing the measured wavefroms, the casing wave amplitude is reduced to 12% and the compressional wave velocity can be easily obtained from the measurement technique. Both the theoretical modeling and experiment results demonstrate the feasibility of the proposed technique. This study establishes the theoretical and experimental foundation for cased-hole dual source of opposite polarity acoustic logging tool development. |
| |
| Keywords: | |
|
| 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 |
|
