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OGP updates seismic position "P" standards

Thursday, May 24, 2012

The Geomatics Committee of the International Association of Oil & Gas producers (OGP) has launched revised versions of its P1, P2 and P6 marine seismic position data standards.

The revised P1 and P2 formats, for marine seismic position data, are called OGP P1/11 and OGP P2/11.

The new files have a common header, which appears at the beginning of each "P" format file, containing survey summary and configuration data. The Co-ordinate Reference Systems have been defined, and the standard can handle pre-plot data, the definition of positional information and its accuracy.

The developments should allowing greater flexibility in dealing with today's survey configurations and those in the future, OGP says.

The work to update the formats is "essentially complete," OGP says.

The revised standards have been "pre-released". The standards will now be thoroughly tested and reviewed, before being formally ratified and released later this year.

Since the early 1990s, marine seismic position data has been recorded using "P" formats, commonly P1/90 and P2/94. The formats were originally developed for the UK oil industry body UKOOA (since renamed Oil and Gas UK) and were then adopted by the industry worldwide. Ownership of the standards was transferred to OGP's geomatics committee in 2006.

OGP started work to revise the P1 and P2 standards in 2009, because they were unable to deal with an increasing number of variations and add-ons being used, and advances in seismic acquisition and processing technologies.

The work to revise standards was co-ordinated with standard development work at the Society of Exploration Geophysicists (SEG) to revise its SEG-D standards, with a decision to phase-out the SEG-P1 standard.

The P6 standard covers definition and exchange of 3D seismic binning grids. The existing standard is called P6/98.

There is now a revised P6 standard, which will replace the P1 standard for data exchange. The new standard addresses geo-spatial integrity issues being faced with the re-projection of 3D seismic bin grids.

There is an existing standard for the definition and exchange of 3D seismic binning grids, called p6/98.

OGP is developing user guides for the P1, P2 and P6 formats.

The revised formats will also be presented in a paper at EAGE Conference in Copenhagen (4 - 7 June 2012).

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