| 李疾翎,陶爱华,刘临政,程林波,王明辉.有效测量套管井泄漏Lamb波衰减的实验研究[J].,2020,39(1):142-149 |
| 有效测量套管井泄漏Lamb波衰减的实验研究 |
| Experimental study on effective measurement of leakage Lamb wave attenuation in cased hole |
| 投稿时间：2019-03-29 修订日期：2019-12-25 |
| 中文摘要: |
| 低密度水泥在油气井中的广泛应用使得声阻抗类测井方法难以准确、有效地评价固井质量。基于套管中传播的弯曲型Lamb波对套后介质的声学参数和胶结状况的敏感性，本文通过实验验证了激发弯曲型Lamb波的有效方式，探讨了入射和接收角度对Lamb波衰减测量的影响。测量结果表明，入射和接收角度在一定范围内变化时，虽然激发的Lamb波模式均是弯曲型Lamb波，但在同一套管模型下测量的衰减值会有差异，选择激发弯曲型Lamb波的最有效方式，计算得到的Lamb波衰减对套后介质的灵敏度才会最高。 |
| 英文摘要: |
| The wide application of low-density cement in oil and gas wells makes it difficult to accurately and effectively evaluate the cementing quality of acoustic impedance logging methods. Based on the sensitivity of the flexural Lamb wave propagated in the casing to the acoustic parameters and cementation status of the media behind the casing, this paper verified the effective way of stimulating the flexural Lamb wave through experiments, and discussed the influence of incidence and reception Angle on the attenuation measurement of the Lamb wave. The measurement results show that when the incident and receiving angles are within a certain range, although the excited Lamb wave modes are flexural Lamb waves, the attenuation values measured under the same casing model will be different. Select the most effective way to excite the flexural Lamb wave, and the calculated Lamb wave attenuation will have the highest sensitivity to the medium behind the casing. |
| DOI：10.11684/j.issn.1000-310X.2020.01.018 |
| 中文关键词: 弯曲型Lamb波，衰减，频散 |
| 英文关键词: Flexural lamb wave, Attenuation, Dispersion |
| 基金项目:国家十二五科技重大专项 “声电套损检测技术与装备研制” |
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