SEG 2013 in Houston

Where: Houston, Texas, USA
Date: September 22-27, 2013
Booth: #3117
Website: www.seg.org/web/annual-meeting-2013/overview

Stop by the Acceleware booth at SEG to find out the latest in seismic exploration and high performance computing. Learn about the latest algorithm developments for FWI and 3D Elastic modeling, hardware acceleration advancements and product updates for Acceleware’s Reverse Time Migration (RTM) library and forward modeling solver for marine CSEM.

Acceleware Conference Sessions

True-amplitude common-shot acoustic reverse time migration (RTM)

Presented by: Yilong Qin, Acceleware Ltd.
Thu September 26 @9:45am, SPMI 6: Advanced Migration Algorithms Session
Generating true-amplitude acoustic RTM shot images is an important step for improving the quality of an RTM image. One way to generate a true-amplitude RTM common-shot image is via Least-Squares RTM (LSRTM). But iterative LSRTM can be computationally expensive. In practice, a cross-correlation imaging condition (CCIC) with source illumination normalization is often used in the conventional time-domain RTM. However, the CCIC with source illumination normalization does not produce a true-amplitude RTM common-shot image, if the directional fold correction factor (or the horizontal slowness at each receiver) is not accounted for while back-propagating the receiver wavefield.

In this presentation, enlightened by the true-amplitude Kirchhoff common-shot inversion formula, we propose an approach to generate the true-amplitude RTM common-shot image by incorporating the directional fold correction into the receiver wavefield. Synthetic examples in constant and v(z) models show that, in the absence of low-frequency self-correlation noises, a true-amplitude acoustic RTM common-shot image can be obtained by combining the source-illumination-normalized cross-correlation imaging condition with the directional fold correction factor. Imaging of a modified version of the Marmousi-II model is also shown to demonstrate the effectiveness of our proposed approach.

Direction-vector-based angle gathers from anisotropic elastic RTM

Presented by: Ray McGarry, Acceleware Ltd.
Wed September 25 @10:35am, SPMI 4: Anisotropy, Elasticity, and Attenuation Session
In this session we will present a method for calculating angle gathers from anisotropic elastic RTM. Reflection angle and azimuth are determined from direction vectors calculated directly from the propagating wavefields. We show that, depending on how the direction vectors are calculated, it may be necessary to convert from group angle to phase angle as part of the angle gather binning process. We give a simple expression for performing this conversion in the case of qPwave components. Finally, we show that our method is capable of accurate reproduction of theoretical PP reflection coefficients for anisotropic elastic models.

HPC Theater Presentation

Optimizing RTM for Intel® Xeon Phi™ Coprocessors: Lessons Learned

Presented by: Darren Foltinek, Acceleware
When: Wednesday, September 25 at 10:00am
Where: High Performance Computing Theater (exhibition floor #3501)
In this presentation we will share our experience in porting and optimizing a commercial Reverse Time Migration library to a cluster of Xeon Phi Coprocessors. We first highlight the similarities of optimizing a TTI propagation kernel for Xeon Phi and Xeon Sandy Bridge, demonstrating how we optimized the OpenMP pragmas and tuned the auto-vectorizer. The second part of the presentation will focus on achieving linear scaling across multiple devices and nodes, which is critical when dealing with real-world problem sizes. We will discuss how to multi-task communication between Xeon Phi devices, hard disk IO, and the core computation kernel. Finally, we will provide an overview of the Linux set up and the additional tools that were used.

Acceleware Booth Presentations

An Introduction to Full Waveform Inversion using the AxRTM™ Library

Presented by Dr. Ray McGarry, Acceleware
Mon September 23 @11:00am, Tue September 24 @2:00pm, Wed September 25 @2:00pm
Full Waveform Inversion (FWI) is a technology whose time has come. In this presentation Acceleware will introduce the basic concepts of FWI. We will show, through examples, that FWI is very closely related to the Reverse Time Migration (RTM) method of seismic imaging and demonstrate how the Acceleware AxRTM library may be used to invert seismic data to derive high quality earth models of unprecedented detail.

AxRTM: An Industry Leading Reverse Time Migration Library

Presented by Darren Foltinek, Acceleware
Mon September 23 @2:00pm, Tue September 24 @11:00am, Wed September 25 @1:00pm
AxRTM is Acceleware's CPU & GPU enabled Reverse Time Migration library. This presentation will profile recent product enhancements including: low-cost and effective removal of the RTM low-frequency noise, improved amplitude correctness for better image quality in shallow sediments, improved speed for TTI, VTI and isotropic media and support for the latest NVIDIA® Tesla GPUs and Intel® Xeon Phi™ coprocessors. Performance figures and image results will be examined.

How Systems and Software Must Evolve to Satisfy Seismic Imaging Challenges

Presented by Ty McKercher, NVIDIA
Tue September 24 @10:00am, Wed September 25 @10:00am
This presentation will cover how GPUs have evolved to solve complex seismic imaging challenges. Over the past five years, three generations of NVIDIA GPUs have delivered affordable seismic imaging techniques, including RTM, FWI, and Elastic algorithms. During this evolution, earth models have significantly improved, yielding better drilling decisions. Customer performance proof points will be used to highlight real world experiences.

High Performance Computing Platforms for Geophysics in the Coming Decade

Presented by Philippe Thierry, Intel
Mon September 23 @1:00pm, Tue September 24 @1:00pm
Can seismic imaging and inversion problems be scaled to the next generation super computer as data volume and complexity continue to grow? This presentation will examine the compute demands of the industry and how technology may meet this challenge. An overview of Intel’s current and future hardware will be provided as well as planned software advancements.

Speakers

Darren Foltinek

Darren Foltinek at SEG 2013

RTM Product Manager, Acceleware Ltd.
Darren is the product manager for seismic products at Acceleware. He is responsible for the successful development and launch of Acceleware seismic software used by companies world-wide. Darren has over 12 years of experience in developing commercial applications, including Acceleware’s GPU enabled Reverse Time Migration and Forward Modeling libraries. Prior to joining Acceleware Darren worked in the geophysics industry as a software consultant. Darren has a B.Sc. in Electrical Engineering with a Minor Computing Engineering from the University of Calgary.

Dr Ray McGarry

Dr Ray McGarry at SEG 2013

Seismic Research Team Lead, Acceleware Ltd.
Ray leads the seismic research team at Acceleware, with particular interests covering Acoustic and Elastic Modeling, Migration and Full Waveform Inversion. He is the principal researcher behind the AxRTM family of products. Prior to joining Acceleware, Ray held various consultancy positions throughout the Oil & Gas, Nuclear and Environmental industries. He has presented at many conferences, including SEG and EAGE, and co-authored numerous publications, including several high-level reports to the UK government. Ray has a Ph.D. in Theoretical Quantum Physics from the University of Manchester.

Dr. Yilong Qin

Dr Yilong Qin at SEG 2013

Geophysical Researcher, Acceleware Ltd.
Yilong is responsible for developing and implementing new geophysical algorithms. He has developed several key technologies for Acceleware’s modeling and migration libraries and has worked on RTM workflow and process optimizations. Prior to joining Acceleware, Yilong’s experience included the research and development of innovative seismic processing techniques to extract more reliable subsurface information from seismic datasets. Yilong has authored many publications for industry associations and journals. Yilong has a Ph.D. in Seismology from the Institut de Physique du Globe de Paris (IPGP)..

Ty McKercher

Ty McKercher at SEG 2013

Principal Solution Architect, NVIDIA
Ty McKercher is a Principal Solution Architect with NVIDIA, leading a team that specializes in systems architecture across multiple industries. He often serves as a liaison between customer and product engineering teams during emerging technology evaluations. His passion is to help solve problems that intersect visualization and HPC challenges. Ty earned his Mathematics degree with emphasis in Geophysics and Computer Science from the Colorado School of Mines.

Philippe Thierry

Philippe Thierry at SEG 2013

Energy Engineering Team Manager, Intel
Philippe Thierry leads the Energy Engineering team at Intel. His long term research activity is devoted to performance extrapolation, application characterization and modeling toward Exascale computing. Philippe obtained a Ph.D. in Geophysics and seismic imaging from Paris School of Mines, France, where he has spent several years working on 3D Prestack Depth Migration, AVO/AVA Inversion and High Performance Computing. Philippe also worked at SGI as a benchmarking team leader before joining Intel Corp in the Paris area.