| 摘要: |
| 针对随钻声波测井过程中各种噪声干扰造成声波信号失真的问题，提出了使用线性V系统的降噪方法。首 先，通过V系统变换将声波测井信号变换到频率域,然后去除其高频分量，再通过V系统反变换获得降噪后的信号。 由于V系统是在匕[0,1]空间上的分段钱性完备正交函数系，并且具有多分辨性质，所以V系统降噪相比经典的小 波降噪有更好的效果。试验结果表明，该方法能够获得较好的降噪信号。 |
| 关键词: 随钻声波测井 V系统 降噪 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重点项目(10534040);国家自然科学基金面上项目(40574049和40874097)；高等学校博士学科点专项科研 基金项目(20070425028) |
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| Application of V-system in acoustic logging while drilling data denoising |
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XIAO Hong-bing1,2,YANG Jin-zhou2,JU Xiao-dong1,QIAO Wen-xiao1
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(1. State Key Laboratory of Petroleum Resource and Prospecting in China University of Petroleum，Beijing 102249，China;2. Drilling Technology Research Institute, Shengli Oilfield, Dongying 257017，China)
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| Abstract: |
| For acoustic signal distortion problems caused by a variety of noises in acoustic logging while drilling ( LWD), a denoising method by using a linear V-system was proposed. First, acoustic logging signals are transformed to frequency domain by V-system, and its high-frequency components are removed, then the signals after noise reduction are reconstructed by the inverse V-system transform. V-system is a class of complete orthogonal function system on ^[0, 1 ], and it is multiresolution. So the linear discrete V-system transform (DVT) is better than traditional wavelet transform. The test results show that relatively good denoising signals can be obtained by linear DVT. |
| Key words: acoustic logging while drilling V-system denoising |
