When: October 16 - 21, 2016
Where: Dallas, Texas, USA
From global oil, gas, and mineral exploration to new areas of civil engineering, environmental regulation, and archaeology, the SEG Annual Meeting is one of the year's most anticipated events for gaining the latest in technical insights and meeting face-to-face with colleagues and companies across multiple disciplines of the geosciences sector.
Acceleware will be presenting during the technical program, as well as providing in-booth presentations on seismic exploration and high performance computing. Speak with an expert or attend one of our presentations about Acceleware’s FWI commercially ready modular platform (AxFWI), as well as our Reverse Time Migration (AxRTM) and our 3D finite difference seismic modelling application (AxWAVE) – which is now available in the cloud!
Acceleware In-booth Presentations at SEG 2016
Reverse Time Migration and a Cost Effective Approach to Generating Angle Gathers
In today’s tight budget reality, new seismic data acquisition is scarce. Now is the time to take a second look at existing data. RTM is an advanced migration method for seismic depth imaging in areas of complex geology. Acceleware’s AxRTM is highly optimized for modern high performance computing (HPC) and uses advanced techniques for better images. We present our recent developments in this talk including RTM Angle Gathers.
Monday October 17: 11:00 am
Tuesday October 18: 3:00 pm
Wednesday October 19: 1:00 pm
Live Demo! Running a Seismic Forward Modelling Example in the Cloud
Seismic forward modelling is used to simulate seismic wave propagation through the subsurface to gain insight into subsurface structures. It is very useful for seismic acquisition design, testing geological model hypothesis, and seismic processing. Here we demonstrate its ease of use and ease of access - for the very first time in the cloud!
Monday October 17: 1:00 pm
Tuesday October 18: 11:00 am
Wednesday October 19: 3:00 pm
Want to Get Started with Full Waveform Inversion?
Full Waveform Inversion is gaining more and more popularity, yet it largely remains a specialist’s tool. Acceleware has developed a modular FWI platform allowing geoscientists to discover and expand its potential to deliver very detailed subsurface velocity models. We present an introduction to this platform as a means to jumpstart your work in FWI with an optimized solution for modern HPC environments.
Monday October 17: 3:00 pm
Tuesday October 18: 1:00 pm
Wednesday October 19: 11:00 am
Acceleware Technical Program Presentations at SEG 2016
Reducing under-sampling artifacts in 3D true-amplitude RTM angle gathers
For generating RTM Angle-Domain Common Image Gathers (ADCIGs), indexed by subsurface reflection and azimuth angles, the coarsely-sampled or irregularly-smapled shot and receiver locations on the surface leads to severe under-sampling artifacts in ADCIGs with small angle binning size. These under-sampling artifacts are worse for the shallow refelctors and small reflection angle in the case of 3D data.
In this paper, we first derive that the theoretical number of hitcount for each angle bin is given by the determinant of the Jacobian matrix of transforming subsurface angle to surface shot coordinates. Then we illustrate that the undersampling artifacts are linearly proportional to the percentage deviation of actual hitcount number with respect to the theoretical hitcount number. At last, we propose using relative hitcount compenstation to reduce the undersampling artifacts for RTM 3D ADCIGs, and demonstrate its effectiveness on 3D synthetic.
Session ID: Advances and Applications in Seismic Migration - SPMI P1
Type: Poster Presentation
Presenter: Dr. Yilong Qin, Acceleware
When: Monday, October 17 - 4:10pm
Room: 7G, Lobby D/C in the Kay Bailey Hutchison Convention Center
Effect of random noises and inaccurate reflection angle estimation on the amplitude of 3D RTM angle gathers: a numberical study
The amplitude of the true-amplitude RTM angle gather provides an estimate of the angle-dependent reflection coefficient. In other words, for RTM angle gathers, the peak amplitude on each reflector is proportional to the angle-dependent reflection coefficient at the specular incidence angle. However, the amplitude of the RTM angle gather is also affected by other factors such as different imaging conditions, complex overburden velocity, undersampling artifactsm random noise, reflection angle estimation methods, source/receiver ghosts, transmission losses, attenuations, etc.
In the paper, we first use 3D angle-domain correlation-type imaging conditions to generate 3D true-amplitude RTM azimuth-sctored angle gathers by using a small shot spacing and show the corresponding specular hitcount number for each angle bin. Then, by adding very strong Gaussian noise to the shot gather, we demonstrate that the Huygens summation process in the receiver wavefield backward propogation attenuates most of the random noise. The SNR in the true-amplitude RTM shot image is lower in the deeper part of the image. The obtained angle gather has a much higher SNR than the shot image, due to the small shot spacing. By perturbing the reflection angle estimation, we show that the amplitude of near angle traces is more sensitive to errors in the reflection angle calculation.
Session ID: Workflows and New Indicators - AVO 1
Type: PC-Based Oral Presentation
Presenter: Dr. Yilong Qin, Acceleware
When: Monday, October 17 - 4:35pm
Room: 174 in the Kay Bailey Hutchison Convention Center
Dr. Yilong Qin
Geophysical Researcher, Acceleware Ltd.
Team Lead, Software Development, Acceleware Ltd.