Data Storage and Distribution
One of the painful lessons learned from the earlier SEG/EAGE 3D modeling work was that provision needs to be made quite early in the process for long-term storage and distribution so that the data that are generated don’t become inaccessible within a few years. For example, the old SEG/ EAGE 3D model shot records are sitting on D2 tapes in the basement of the Tulsa SEG headquarters. It is now cheaper for someone to regenerate those shot records from scratch on a moderate Linux cluster than it is to try to recover the data from those outmoded tapes. In line with the overall SEAM business model to put out for bid contracts for the various aspects and phases of the project, the Storage and Distribution Committee was formed to research commercial storage options, estimate budget impact, and help draft bid specifications.
The first step was to assess the amount of data that would need to be stored. As the model and acquisition design were constantly in flux, this proved a challenge. At various points, proposed data acquisition schemes ranged from the low hundred terabytes to more than two petabytes. Clearly, as the volume of data would be a large component in the cost of storage and distribution, the committee assembled a list of companies that would have the capability and potential interest in storing and distributing SEAM data. These covered a range of business models: traditional E&P data storage and transcription, PC data backup and restore, and corporate data center.
Figures & Tables
SEAM Phase I: Challenges of Subsalt Imaging in Tertiary Basins, with Emphasis on Deepwater Gulf of Mexico
“SEAM is a collaborative industrial research effort dedicated to largescale, geophysical numerical simulation projects. The projects are designed to provide the geosciences exploration community with earth models and simulated data that represent significant geophysical challenges of high business value to the petroleum resource industry. The Phase I project produced a deepwater subsalt earth model designed to capture as much physics and realism as possible in a 3D model that was relevant to oil and gas exploration. The 3D model covers a 40 õ 35 õ 15 km area and includes a complex salt intrusive in a folded Tertiary basin. The primary deliverable was the seismic data set of variable density acoustic simulations consisting of 200 TB of uncompressed traces for over 60,000 shots. Also delivered to the participants were several smaller compressed subsets of these data (“classic” data sets) intended for easier handling, simpler distribution to third parties, and easier comparison of imaging tests results. This report covers how the prime objectives of Phase I were met. Details are outlined in chapters on Model Development, Numerical Design and Vendor Qualification, Acquisition Design, Production Simulations, Quality Control, and Data Storage and Distribution.”