Study on P-wave Attenuation in Hydrate-bearing Sediments in Shenhu Area, South China Sea

2014 ◽  
Author(s):  
Chuanhui Li ◽  
Xuewei Liu ◽  
Yong Wang ◽  
Xuejian Ma
Keyword(s):  
South China Sea ◽  
South China ◽  
Wave Attenuation ◽  
P Wave ◽  
Shenhu Area ◽  
China Sea ◽  
Hydrate Bearing Sediments

Seismic wave attenuation in hydrate-bearing sediments based on the patchy saturation model in the Shenhu area, South China Sea

2017 ◽  
Vol 5 (3) ◽  
pp. SM25-SM32
Author(s):  
Chuanhui Li ◽  
Xuewei Liu
Keyword(s):  
South China Sea ◽  
South China ◽  
Wave Attenuation ◽  
Theoretical Modeling ◽  
P Wave ◽  
Saturation Model ◽  
Shenhu Area ◽  
China Sea ◽  
Seismic Frequencies ◽  
Hydrate Bearing Sediments

In the Shenhu area, South China Sea, a study on P-wave attenuation in the hydrate-bearing sediments has been developed based on the Biot-Squirt (BISQ) porous medium model. However, the BISQ model has been proven to be inappropriate for the attenuation characteristics at seismic frequencies. We have adopted the patchy-saturation model, which is being increasingly considered to be more suitable for attenuation analysis at seismic frequencies in porous media, to study P-wave attenuation in the hydrate-bearing sediments in the Shenhu area, South China Sea. The theoretical modeling indicates that the P-wave attenuation at seismic frequencies is observed to decrease when the sediments contain gas hydrates. In the case studies in the Shenhu area, the interval inverse [Formula: see text]-factors from seismic reflection data were estimated, and the results indicate good agreement with the theoretical modeling.

scholarly journals Study on p-Wave Attenuation in Hydrate-Bearing Sediments Based on BISQ Model

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Chuanhui Li ◽  
Kai Feng ◽  
Xuewei Liu
Keyword(s):  
Porous Medium ◽  
South China Sea ◽  
South China ◽  
Gas Hydrates ◽  
Wave Attenuation ◽  
P Wave ◽  
Shenhu Area ◽  
Seismic Wave Attenuation ◽  
Hydrate Bearing Sediments ◽  
Attenuation Characteristics

In hydrate-bearing sediments, the elastic wave attenuation characteristics depend on the elastic properties of the sediments themselves on the one hand, and on the other hand, they also depend on the hydrate occurrence state and hydrate saturation. Since the hydrate-bearing sediments always have high porosity, so they show significant porous medium characteristics. Based on the BISQ porous medium model which is the most widely used model to study the attenuation characteristics in the porous media, we focused on p-wave attenuation in hydrate-bearing sediments in Shenhu Area, South China Sea, especially in specific seismic frequency range, which lays a foundation for the identification of gas hydrates by using seismic wave attenuation in Shenhu Area, South China Sea. Our results depict that seismic wave attenuation is an effective attribute to identify gas hydrates.

Revision of P-wave velocity and thickness of hydrate layer in Shenhu Area, South China Sea

2014 ◽  
Vol 13 (5) ◽  
pp. 742-746 ◽  
Author(s):  
Jianming Gong ◽  
Xunhua Zhang ◽  
Changchun Zou ◽  
Qiang Chen ◽  
Lichen Wang ◽  
...  
Keyword(s):  
South China Sea ◽  
Wave Velocity ◽  
South China ◽  
P Wave ◽  
Shenhu Area ◽  
China Sea ◽  
Hydrate Layer ◽  
P Wave Velocity
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