Advances in New and Renewable Energy >
Study of the Technology to Obtain the Sound Velocity Profile of Hydrate Bearing Unconsolidated Sediments
Received date: 2015-05-17
Revised date: 2015-06-29
Online published: 2015-08-30
According to the ultrasonic tomography technology based on ray theory, the adaptive noise cancellation was adopted to remove the premise of autoclave under the inherent noise. The straight ray-tracing method and the iterative algorithm based on SIRT algorithm were applied to realize forward modeling and inversion of the ultrasonic tomography. Then the acoustic velocity profile distribution images of hydrate formation in loose sediments were obtained. The results showed that the two-dimensional sound velocity profile structures of hydrate bearing sediments obtained by using ultrasonic tomography technology could accurately reflect the distribution of hydrate in sediments at different time and saturation. The P-wave velocity profile structures fit in well with S-wave velocity profile structures. Besides, with the experimental data, several velocity models were used to validate the relationship between the sonic velocity and the saturation of hydrate.
FANG Yue-long , HU Gao-wei , LIU Chang-ling , ZHAO Shi-jun . Study of the Technology to Obtain the Sound Velocity Profile of Hydrate Bearing Unconsolidated Sediments[J]. Advances in New and Renewable Energy, 2015 , 3(4) : 309 -318 . DOI: 10.3969/j.issn.2095-560X.2015.04.011
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