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Penobscot 3D - Survey

Download this Torrent


Optional Downloads:

  • Download additional 3D gathers (101 GB)
  • The well data in the above torrent do not contain any wireline logs. The well data in OpendTect can be downloaded by clicking the link below. These wireline logs have been digitized by the university students (see Acknowledgement) and the data is being contributed by CNSOPB.

Download OpendTect WellInfo Directory
Download LAS files (zipped)

General

Country:CANADA
Location:Offshore Nova Scotia
CNSOPB Program No:NS 24-N11–1E
Coordinates:44°07′46″ N / 60°06′00″ W view in Google Earth
Year:1992
Data Summary3D and 2D Seismic Data, 3D and 2D Prestack Data, Stacking velocities, Wells, Markers, Horizons
Size:12.4 GB (uncompressed), 8.7 GB (download)
License:Seismic data and velocity functions: Owned by Nova Scotia Department of Energy. Distributed by permission. Derived volumes may be distributed if Nova Scotia Department of Energy is acknowledged as the owner of the original data.
Interpretations and derived volumes: Created and released by dGB Earth Sciences B. V. under Creative Commons license


Contributors

Company:Nova Scotia Department of Energy and
Canada Nova Scotia Offshore Petroleum Board
Website: www.gov.ns.ca/energy and www.cnsopbdmc.ca
Company:dGB Earth Sciences B.V.
Website: www.dGBes.com
Acknowledgment:dGB thanks the Nova Scotia Department of Energy and the Canada Nova Scotia Offshore Petroleum Board for making this dataset available for the Open Seismic Repository. We also acknowledge the M.Phil. research students namely Naveed Iqbal and Junaid Talha from Quaid-i-Azam University (Islamabad, Pakistan) for digitizing the wireline logs and sharing the dataset to the community. CNSOPB is hereby acknowledge for granting permission to publish the well data also.



Geological Features

The data covers many geological features, which include graben bounded faults, channels, mega-scale de-watering faults, reefs, etc.

Applicable Techniques

Attributes

  • All OpendTect Attributes
  • Prestack Attributes
  • Attribute Cross plots
  • Creation of velocity volumes

Plugins

  • Dip-Steering
  • Neural Networks
  • SSIS
  • VMB


Full survey description


Figure-1: The Penobscot survey is located about 25 km NW of the Sable Island (Canada).
The survey lies in the Scotian shelf (Figure-1), Offshore Canada. It contains several interpreted surfaces and two key wells. The survey contains several structural and stratigraphic features which can be highlighted by OpendTect attributes or advanced plugins. One main advantage of this survey is that it comes with a prestack dataset. You might also notice two major faults within the survey area that form en echelon pattern. These faults mostly displace the interpreted surfaces. Multi-trace similarity, volumetric amplitude or volumetric curvature maps could highlight these features.


The seismic signal is poor below 3.0 seconds (about 5km). Only two wells, L-30 and B-41, were drilled in the area penetrating Misaine and Baccaro members of Jurassic Abenaki Formation (Figure-2). Several oil and gas fields are located in these Late Jurassic to Cretaceous intervals (http://www.cnsopb.ns.ca/cnsopb_assessment_reports.php). The Lower Logan Canyon sands in L-30 were considered oil bearing (minor accumulation). Some of the stratigraphic information is available also in OpendTect (please see the Manage Stratigraphy window in the OpendTect survey). However, the sub intervals of the Lower Logan formation are not mapped in OpendTect.

Figure-2a: A stratigraphic column of the Scotian Basin [1]. Figure-2b: A geological model of Scotian basin [1].


The wells are available in the OpendTect survey, with markers and a time to depth model. The time to depth models have been taken from the CNSOPB report [1]. The survey also contains a limited range of prestack data, which is listed in the Available Data section.


Figure-3: A 3D perspective view of the data that is contained in the survey.

Survey parameters

Inline Range10001600step 1
Crossline Range10001481step 1
Bin size (m) [inl/xl]12.0125.01 
Z Range (ms)06000step 4
Seismic Polarity: SEG Normal
Size (km)7.2 x 12.03


Available Data

3D Seismic Data:

1-PSTM stack agc
2-Detailed Steering BG111–113 (filt 224)
3-Background_Steering BG550 (filt 339)

2D Seismic Data:

Sable-Island-2D lineset
Lines 02C, 03C, 04C, 05C, 06C, 07C, 08C, 44, 45, 46, 47
pstm stack raw
Steering detailed
Steering background

Prestack Gathers:

  • 3D_gathers_pstm_nmo
    • Type: NMO migrated gathers
    • Total number of gathers: 19280
    • Inline range: 1280 - 1320 step 1
    • Crossline range: 1000 - 1481 step 1
    • Mute definition: provided
  • 2D gathers pstm nmo
    • Type: NMO migrated gathers
    • Lines: 2: 05C, 45.

Stacking velocities

  • Loaded as velocity functions
  • A volume builder setup is saved and will provide the RMS velocity volume when run.

Horizons

  • 1-Hor A Seabed
  • 2-Hor B
  • 3-Hor C
  • 4-Hor D
  • 5-Hor E

Wells and available logs

  • B-41 (Track, TD Model, Markers)
  • L-30 (Track, TD Model, Markers)


References

1- CNSOPB: Geoscience - Publication link http://www.cnsopb.ns.ca/geoscience_publications.php

Other helpful references:

Kidston, A. G., Brwonl, D. E., Smith, B. M., and Altheim, B., 2005. The Upper Jurassic Abenaki Formation, Offshore Nova Scotia: A Seismic and Geologic Perspective. Download PDF

Nova Scotia: Offshore Wells Overview Map Download PDF

CNSOPB: Discoveries and Produciton Licenses Download PDF

CNSOPB: Technical Summaries of of Scotian Shelf: Significant and Commercial Discoveries Download PDF

Ammonite Nova Scotia Corporation weblink: More information on Penobscot and Eagle Structures http://www.ammonitenovascotia.com/index.htm

OETR Note: Data Release Download PDF