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GPU Accelerated Anisotropic PSTM Imaging Success in a Fold and Thrust Belt, Onshore TrinidadNormal access

Authors: T. Dhanpaul, S. Ragbir, M.Q. Guo, Y.M. He and Y. Tian
Event name: 76th EAGE Conference and Exhibition 2014
Session: Practical Velocity Estimation in Complex Environments
Publication date: 16 June 2014
DOI: 10.3997/2214-4609.20140860
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.22Mb )
Price: € 20

Summary:
Nowadays PSDM has the unbeatable imaging advantages with the increasing computing capability. However, in some tectonically complex area, comparing to possibility of mislead by sudden velocity variation of PSDM results, practical experiences frequently told PSTM yielding good results. With the reinforcement of GPU technology,anisotropic PSTM can achieve an accurate result and and it can be used as a good guidance for further PSDM study. Trinidad lies on the South American tectonic plate and falls within the Orinoco Fold Belt which is a prolific oil producer. The study area is located within the intensely deformed southern basin of Trinidad.Seismic data recorded is typically very poor. This paper focuses primarily on some of the processing challenges caused by the undulating topography, complex subsurface structures, the presence of high-velocity rocks near at surface within the project area as well as the impact of back-scattered energy and severe migration wavefields and how these challenges were mitigated against thereby improving the overall data quality and its interpretability. The final results showed better resolution,enhanced structural geometries and fault definition. As a result, it is envisaged that when interpretation is completed on this dataset in the very foreseeable future that enormous potential would be unlocked.


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