Open data

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Dictionary entry for Open data (edit)

Open datasets are explicitly and clearly licensed for use by anyone without permission from the rights holder. The purpose may or may not be restricted by the terms of the license — common exclusions are 'attribution' and 'non-commercial', though some people do not consider 'non-commercial' restricted data to be open sensu stricto. Public domain datasets are unrestricted in use or range, and have no license.

This page documents geophysical data that is readily available for download from the internet, via mail, or through special request. Key parts of the data documentation are:

  • a descriptive overview of the data including types of data available
  • terms of use
  • how to obtain a copy of the data
  • how to obtain other support data
  • links to publications

NOTE: Please visit this page for internet-accessible exploration and geophysical consortia.

2D land seismic data

ALASKA 2D LAND LINE 31-81

This 2D land data, from the National Petroleum reserve Alaska, is provided by the U.S. Geological Survey. It is a short line with small statics. There is ground roll and noise bursts, but there is also good signal. Data includes unprocessed prestack data, final stack, and images of previous stack. Scripts for processing with Seismic Unix (su) are available. This is a good line to start experimenting with open data and su because there is a full processing sequence including data download, reformat, header loading, gain, prestack f-k filter, brute velocity estimation, brute stack, residual statics, final velocity analysis, final stack, and two types of post stack migration (phase shift and Kirchhoff migration). This 2D land data comes with executables for su release 43R1 on Linux, which is useful if su is not installed on your system. For more information on the Alaska 2D Land Line 31-81, click here.

ALASKA 2D LAND LINE 16-81

This 2D land data, from the National Petroleum reserve Alaska, is provided by the U.S. Geological Survey. The Alaska 2D Land Line 16-81 intersects Land Line 31-81, and its processing sequence is the same as that used for Alaska 2D Land Line 31-81. Seismic Unix scripts and a research poster are available. When compared with line 31-81: the ground roll is weaker; there are fewer noise bursts; and there is a larger statics problem and more structure between 1 and 2 seconds. For more information on the Alaska 2D Land Line 16-81, click here.

Poland 2D Vibroseis LINE 01

This 2D land vibroseis dataset was donated to the public domain by Geofizyka Torun S.A, Poland. SEG Y data includes geometry in headers and uphole statics in SPS files. This data was used to create Freusp and Madagascar RSF tutorials.

To download the Line_001, click here. (388.9 MB)

For more information on the Poland 2D Vibroseis Line 01, click here.

2D marine seismic data

US EAST COAST DEEP WATER LINE 32

This 242 km line is collected from a water depth of over 5 seconds to less than 0.3 seconds, and is provided by the U.S. Geological Survey. There are strong multiples, diffractors, and a bottom-simulating reflector (BSR) related the the gas hydrate. For more information on the US East Coast Deep Water Line 32, click here.

Mobil Avo Viking Graben Line 12

Mobil Oil Company released this 25 km line to be used at an SEG research workshop on Seismic inversion methods at the Los Angeles convention in 1994. Data includes prestack shot record data and measurement from two wells that intersect the line. It has been widely used to validate amplitude variation with angle/offset (AVA/AVO) and multiple attenuation algorithms. For more information on the Mobil Avo Viking Graben Line 12, click here.

3D land seismic data

TEAPOT DOME 3D SURVEY

The Teapot Dome 3D Survey is a land 3D data set from Wyoming provided by the U.S. Department of Energy and RMOTC. After obtaining an FTP password, Post stack data, well logs, production history, and GIS data can be downloaded from the internet. Unprocessed prestack data is available via mail. For more information on the Teapot Dome 3D Survey, click here.

3D marine seismic data

NORTH SEA NORNE FIELD

These two datasets are provided by Statoil and its partners ENI and Petoro, and hosted by the Norges teknisk-naturvitenskapelige universitet (the Norwegian University of Science and Technology, or NTNU). It consists of:

  • Reservoir simulation model in Eclipse.
  • All wells in the E-Segment including well logs.
  • Oil rates, water rates, and gas rates are available for each well.
  • Production data for each well up to 2004 are given for history matching purpose.
  • 4D seismic data in 2001 is used as base case and two monitors in 2003 and 2004 - (full, mid, near and far offset seismic data in inline and crossline sections).
  • Interpreted horizons such as oil-water contacts for 2001, 2003, and 2004 and faults.

The first dataset spans the 1997-2004 period and covers the E-segment of the Norne Field, while the second dataset spans the 1997-2006 period and contains data for the whole Norne Field.

License terms, which are basically by-attribution, non-commercial, can be found on the NTNU website.

F3 NETHERLANDS

This small marine 3D (plus wells) is offshore Netherlands. It is available in OpendTect format on the dGB Open Seismic Repository under a Creative Commons (CC BY-SA) license: F3 Complete. It is also available as a seismic-only dataset: F3 Seismic Only.

The data are in OpendTect format, but can easily be exported from that tool into SEG Y format.

PENOBSCOT 3D

This small marine 3D (plus wells) is offshore Nova Scotia, Canada. It is available in OpendTect format on the dGB Open Seismic Repository under a Creative Commons (CC BY-SA) license: Penobscot 3D. It is also available as a pre-stack seismic dataset from the same page (101 GB).

The data are in OpendTect format, but can easily be exported from that tool into SEG Y format.

BLAKE RIDGE 3D

This small marine 3D is offshore South Carolina, US. It is available in OpendTect format on the dGB Open Seismic Repository under a Creative Commons (CC BY-SA) license: Blake Ridge 3D. It is available as PreSTM and PreSDM stacks. Blake Ridge is one of the best studied gas hydrate sites in the world.

The data are in OpendTect format, but can easily be exported from that tool into SEG Y format.

New Zealand 3D

Parihaka-3D

This marine 3D final migrated volume is from offshore New Zealand. For more information click here.

Other processed data

There are several other sources for open data that have not been indexed here. These leads include: Gulf of Mexico fata from www.boem.gov and database.gov (click on seismic data) North Sea data - petrobank Brazin ANP

Gravity data

This is a satellite acquired data, curated by the University of California, San Diego (UCSD) and publicly available at the the UCSD website.

Also available is the GOCE data and the recently launched Cryosat, both by the European Space Agency. For more information on accessing this data, click here.

2D Synthetic Seismic Data

SEAM Phase I 2D classic subset

The SEAM phase I 2D classic dataset, distributed in 2014, consists of a cross section at North=23,900 from the 3D Seam phase I model. The section is 35000 m long and depth extends to 15000 m. The earth model is defined with three files: P-Velocity, S-Velocity, and Density. The dataset also includes a segy file of 151 shots from the 3D elastic simulation. Only traces with shot and receiver coordinates on North=23,900 are included. Additional information is in this wiki at SEAM Phase I 2D classic subset.

BP velocity estimation benchmark model

For links to the data set pages, click here.

Chevron GOM Full Waveform Inversion Synthetics for SEG workshops

Chevron distributed a series of 2D Elastic isotropic (Vp, Vs, Dn) marine benchmark synthetics, with and without free surface multiples. These data, used for the SEG workshop on Full Waveform Inversion in 2012, 2013, and 2014. 2012 and 2013 SEG workshops "Gulf of Mexico Imaging challenge" were designed to exercise FWI algorithms for complex salt shapes. Datasets included 2012 SEG model with and without surface multiples included complex salt bodies 2013 SEG model was based on The same earth model, but maximum offset was increased to 30 KM and maximum time to 23 seconds. A starting velocity model to assist inversion testing was made available in August of 2013. CSEM and MT data from the same earth model was distributed in August 2013 An anisotropic (tilted transverse isotropy or tti) version of the synthetic was released in November 2013.

For more information on the models above click Chevron GOM Full Waveform Inversion Synthetic and to download click here.

2014 SEG model released in April of 2014 uses a new earth model. To download click here

SMAART models

SMAART (Subsalt Multiples Attenuation And Reduction Team) models — Pluto, Sigsbee, and Ziggy — are maintained and licensed by TNO and Delphi.

3D Synthetic Seismic Data

SEG/EAGE 3D modeling Salt Model Phase-C 1996

This model was built by the SEG research committee, and created as part of the Advanced Computational Technology Initiative, in partnership with the United States Department of Energy National Laboratories and Technology Centers. The bulk of the computation was done at Sandia and Los Alamos National Laboratories. The modeling resulted in shot records with a large areal receiver array. These data were not retained, but three famous subsets archived by Chuck Mosher are still available:

For more information, email Chuck Mosher. Or, click here.

3D 9C synthetic VSP data

The 3D 9C synthetic VSP data sets were calculated to understand processing challenges caused by laterally-varying anisotropy in the presence of statics.

For data and detailed documentation, click here

Seismic data from Forel's book

Synthetic gravity and magnetic data

Bishop Model

Topographic data for a portion of the volcanic tablelands area north of Bishop, CA has been upscaled by a factor of 30 in x,y, and z dimensions and then shifted in the depth direction such that the structures are all now subsurface (approx 100 to 9300 meters subsea) to use as a test data set for gravity and magnetic calculations (see image below).

Forward calculations of the gravity and magnetic fields were done using GM-SYS-3D from Northwest Geophysical using default extrapolation parameters for a series of models using the depth model with some arbitrary additional susceptibility boundaries added to represent basement lithologic changes/intrusives. The magnetic field was calculated for each model using inclinations of 0, 30, 45, 60 and 90 degrees and a total field of 50,000 nT. Additionally the fields were calculated using varying depths to the base of the magnetic layer (15000 m, 20000 m, 30000 m and a Moho varying from approximately 33000 to 22000 m generated to approximate a passive margin setting).

For more information on the Bishop Model, click here.

Chevron GOM Full Waveform Inversion Seismic CSEM and MT Synthetic

In August of 2013 Chevron distributed CSEM and MT data from the same earth model used in the SEG and EAGE workshops on GOM Full Waveform Inversion. For more information and to download, click here.


See also