A case study: travel time inversion for P-wave velocity using OBS data of South China Sea

2012 ◽  
Vol 33 (4) ◽  
pp. 389-396 ◽  
Author(s):  
Xiangchun Wang ◽  
Timothy A. Minshull ◽  
Changliang Xia ◽  
Xuewei Liu
Keyword(s):  
South China Sea ◽  
Travel Time ◽  
Wave Velocity ◽  
South China ◽  
P Wave ◽  
Time Inversion ◽  
P Wave Velocity ◽  
Travel Time Inversion ◽  
Obs Data

scholarly journals Erratum to: A case study: travel time inversion for P-wave velocity using OBS data of South China Sea

2015 ◽  
Vol 36 (4) ◽  
pp. 355-355
Author(s):  
Xiangchun Wang ◽  
Changliang Xia ◽  
Xuewei Liu
Keyword(s):  
South China Sea ◽  
Travel Time ◽  
Wave Velocity ◽  
South China ◽  
P Wave ◽  
Time Inversion ◽  
P Wave Velocity ◽  
Travel Time Inversion ◽  
Obs Data

scholarly journals Travel time inversion for three-dimensional P-wave velocity anisotropy.

1984 ◽  
Vol 32 (3) ◽  
pp. 197-218 ◽  
Author(s):  
Kazuro HIRAHARA ◽  
Yuzo ISHIKAWA
Keyword(s):  
Travel Time ◽  
Wave Velocity ◽  
Three Dimensional ◽  
P Wave ◽  
Time Inversion ◽  
Velocity Anisotropy ◽  
P Wave Velocity ◽  
Travel Time Inversion

Empirical Equations of P-Wave Velocity in the Shallow and Semi-Deep Sea Sediments from the South China Sea

2021 ◽  
Vol 20 (3) ◽  
pp. 532-538
Author(s):  
Guanbao Li ◽  
Zhengyu Hou ◽  
Jingqiang Wang ◽  
Guangming Kan ◽  
Baohua Liu
Keyword(s):  
South China Sea ◽  
Wave Velocity ◽  
South China ◽  
Deep Sea ◽  
The South China Sea ◽  
P Wave ◽  
Empirical Equations ◽  
China Sea ◽  
P Wave Velocity ◽  
Deep Sea Sediments

Crustal P-Wave Velocity Structure and Layering Beneath Zhujiangkou-Qiongdongnan Basins in the Northern Continental Margin of South China Sea

2009 ◽  
Vol 52 (5) ◽  
pp. 1012-1023 ◽  
Author(s):  
Zhong-Jie ZHANG ◽  
Yi-Feng LIU ◽  
Su-Fang ZHANG ◽  
Gong-Cheng ZHANG ◽  
Wei-Ming FAN
Keyword(s):  
South China Sea ◽  
Wave Velocity ◽  
Continental Margin ◽  
South China ◽  
Velocity Structure ◽  
P Wave ◽  
China Sea ◽  
P Wave Velocity ◽  
P Wave Velocity Structure

scholarly journals Travel-Time Inversion Method of Converted Shear Waves Using RayInvr Algorithm

2021 ◽  
Vol 11 (8) ◽  
pp. 3571
Author(s):  
Genggeng Wen ◽  
Kuiyuan Wan ◽  
Shaohong Xia ◽  
Huilong Xu ◽  
Chaoyan Fan ◽  
...  
Keyword(s):  
Travel Time ◽  
Wave Velocity ◽  
P Wave ◽  
Inversion Method ◽  
Time Inversion ◽  
Ocean Bottom Seismometer ◽  
S Wave ◽  
S Waves ◽  
Inversion Model ◽  
Travel Time Inversion

The detailed studies of converted S-waves recorded on the Ocean Bottom Seismometer (OBS) can provide evidence for constraining lithology and geophysical properties. However, the research of converted S-waves remains a weakness, especially the S-waves’ inversion. In this study, we applied a travel-time inversion method of converted S-waves to obtain the crustal S-wave velocity along the profile NS5. The velocities of the crust are determined by the following four aspects: (1) modelling the P-wave velocity, (2) constrained sediments Vp/Vs ratios and S-wave velocity using PPS phases, (3) the correction of PSS phases’ travel-time, and (4) appropriate parameters and initial model are selected for inversion. Our results show that the vs. and Vp/Vs of the crust are 3.0–4.4 km/s and 1.71–1.80, respectively. The inversion model has a similar trend in velocity and Vp/Vs ratios with the forward model, due to a small difference with ∆Vs of 0.1 km/s and ∆Vp/Vs of 0.03 between two models. In addition, the high-resolution inversion model has revealed many details of the crustal structures, including magma conduits, which further supports our method as feasible.

P-wave velocity anomalies atop and in the mantle transition zone beneath the northern South China Sea from triplicated waveforms

2020 ◽  
Vol 197 ◽  
pp. 104379
Author(s):  
Wenlan Li ◽  
Rongqiang Wei ◽  
Qinghui Cui ◽  
Guohui Li ◽  
Yuanze Zhou
Keyword(s):  
South China Sea ◽  
Transition Zone ◽  
Wave Velocity ◽  
South China ◽  
Northern South China Sea ◽  
P Wave ◽  
Mantle Transition Zone ◽  
China Sea ◽  
P Wave Velocity ◽  
Velocity Anomalies

P wave Velocity Structure in the Crust and Upper Mantle Beneath Northeastern South China Sea and Surrounding Regions

2009 ◽  
Vol 16 (4) ◽  
pp. 252-260 ◽  
Author(s):  
Zhiwei LI ◽  
Yi XU ◽  
Tianyao HAO ◽  
Ya XU ◽  
Jingsong LIU
Keyword(s):  
South China Sea ◽  
Wave Velocity ◽  
South China ◽  
Upper Mantle ◽  
Velocity Structure ◽  
P Wave ◽  
Crust And Upper Mantle ◽  
P Wave Velocity ◽  
Northeastern South China Sea ◽  
P Wave Velocity Structure

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

scholarly journals Acoustic Velocity Log Numerical Simulation and Saturation Estimation of Gas Hydrate Reservoir in Shenhu Area, South China Sea

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Kun Xiao ◽  
Changchun Zou ◽  
Biao Xiang ◽  
Jieqiong Liu
Keyword(s):  
Numerical Simulation ◽  
South China Sea ◽  
Wave Velocity ◽  
South China ◽  
Gas Hydrate ◽  
P Wave ◽  
Shenhu Area ◽  
Free Gas ◽  
P Wave Velocity ◽  
Hydrate Saturation

Gas hydrate model and free gas model are established, and two-phase theory (TPT) for numerical simulation of elastic wave velocity is adopted to investigate the unconsolidated deep-water sedimentary strata in Shenhu area, South China Sea. The relationships between compression wave (P wave) velocity and gas hydrate saturation, free gas saturation, and sediment porosity at site SH2 are studied, respectively, and gas hydrate saturation of research area is estimated by gas hydrate model. In depth of 50 to 245 m below seafloor (mbsf), as sediment porosity decreases, P wave velocity increases gradually; as gas hydrate saturation increases, P wave velocity increases gradually; as free gas saturation increases, P wave velocity decreases. This rule is almost consistent with the previous research result. In depth of 195 to 220 mbsf, the actual measurement of P wave velocity increases significantly relative to the P wave velocity of saturated water modeling, and this layer is determined to be rich in gas hydrate. The average value of gas hydrate saturation estimated from the TPT model is 23.2%, and the maximum saturation is 31.5%, which is basically in accordance with simplified three-phase equation (STPE), effective medium theory (EMT), resistivity log (Rt), and chloride anomaly method.

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