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Method to Estimate Cement Acoustic Wave Speeds from Data Acquired by A Cased Hole Ultrasonic Cement Evaluation Tool
Method to Estimate Cement Acoustic Wave Speeds from Data Acquired by A Cased Hole Ultrasonic Cement Evaluation Tool
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机译:用套管式超声波水泥评估工具获得的数据估算水泥声波速度的方法
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摘要
Embodiments of the disclosure may include systems and methods for estimating an acoustic property of an annulus in a cement evaluation system. In one embodiment, a casing arrival signal is acquired at acoustic receivers a cement evaluation tool. A spectral amplitude ratio is calculated based on the casing arrival signal. The spectral amplitude ratio is scanned to detect and identify discontinuities. If discontinuities are detected, the frequency at the discontinuity may be used to estimate a wavespeed of the annulus. If discontinuities are not detected, attenuation dispersions are calculated and estimated, and an estimated wavespeed and parameters are updated until the calculated and estimated attenuation dispersions match.
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