Challenges for velocity model building and depth imaging in mountainous areas

2017 ◽  
Author(s):  
Jiandong Liang
Keyword(s):  
Model Building ◽  
Velocity Model ◽  
Mountainous Areas ◽  
Depth Imaging ◽  
Velocity Model Building

Velocity model building for tilted orthorhombic depth imaging

2012 ◽  
Author(s):  
Yunfeng Li ◽  
Weishan Han ◽  
Chuen-song Chen ◽  
Tony Huang
Keyword(s):  
Model Building ◽  
Velocity Model ◽  
Depth Imaging ◽  
Velocity Model Building

Getting it right the first time in the Ceduna Sub-basin: regional and target depth imaging in a frontier setting

2017 ◽  
Vol 57 (2) ◽  
pp. 767
Author(s):  
Weidi Koh
Keyword(s):  
Model Building ◽  
Survey Design ◽  
Velocity Model ◽  
Quantitative Interpretation ◽  
Depth Imaging ◽  
Velocity Model Building ◽  
Amplitude Versus Offset ◽  
Dual Sensor ◽  
Streamer Data ◽  
Great Australian Bight

The acquisition and depth imaging of almost 20400 km2 of broadband seismic data in the Great Australian Bight has created an excellent dataset fit for quantitative interpretation. This new dataset was derived from a merge of 12400 km2 of 2011 vintage conventional streamer data in an almost seamless manner with 8000 km2 of 2014 vintage dual-sensor streamer data. The Ceduna Sub-basin is the main depocentre of the Bight Basin. It lies adjacent to the continental shelf and slope and is covered by two broad bathymetric terraces in water depths ranging from <200 to >4000 m. A potentially prospective Late Jurassic syn-rift to Late Cretaceous post-rift sedimentary succession (fluvial to paralic sediments) >15 km thick is imaged with remarkable quality and resolution. Features of particular interest include large stacked fan and channel systems, as well as simple, structurally closed formations. Careful survey design and execution optimised efficiency, enabling each survey to be acquired in less than one season. Particular attention was given to amplitude versus offset and phase compliance, including customised flows to overcome a paucity of well control in this frontier area. Optimised preprocessing, velocity model building and survey merging were applied to ensure structural and depth integrity in the final images. Regional and targeted mapping and quantitative interpretation results testify to the value of the multifaceted geophysical and geological disciplines used in the overall project execution.

Sign in / Sign up

Export Citation Format

Share Document