SVALEX-2004                 

 RV "G.O. SARS" Seismic Survey

University of Bergen (UiB)
Dept. of Earth Science (IFG)
Allé gt. 41, N-5007 Bergen, Norway
Tel: (+47) 5558 3600 Fax: (+47) 5558 3660
23 Nov 2005 w/corrections 3 Dec 2008 (OM)

Introduction

The Svalex course covers a broad range of geophysics and geology topics. It's arranged on Svalbard, with lectures on the UNIS campus in Longyearbyen and field trips using vessels "Nordstjernen" and "G.O. Sars". E-learning is also used - see learning modules at EAGE "learningGEOSCIENCE" journal web site.

More information on Svalex on the project web page www.svalex.net. Participating departments on Norwegian universities are

This web page provides documentation on the RV "G.O. Sars" seismic survey.

Click to see photo gallery:

Content

  1. Navigation data, field logs, geophysical datasets
  2. Gravitymeter ties
  3. Airgun array configuration
  4. Marine seismic streamer configuration

 

1. Navigation data, field logs, geophysical datasets

1
Nav data datum,
UTM Zone / CM		  2
Survey Computer
(EIVA) files:		 3
240 ch, 3 km streamer		 4
Gravitymeter
Data files		 5
Notes
Shot event navigation files Data logging Log sheet Triacq system logs  Tail buoy
position
WGS84
Zone 33X / 15º

./navdata/

QC plots of shot distance
and DOL (Distance Off Line)

 ./EIVA-data-logging ./logsheets/
originals (hand-written)
 ./triacq/ ./tailbuoy ./gravitymeter/  

Table 1: Data, log files

Fig.1: Shotpoint map (click to enlarge)

2. Gravitymeter ties

Correction for drift of the gravitymeter is applied using gravity ties made at the beginning and end of the survey.

Date Gravity station Ship
Time Location    Values    Remarks Time Location Values Remarks
 22. aug. 2004  15:03
Local time (UTC+2h)		  Longyearbyen Airport 6401.91
6401.95
6401.93		 Descriptions:
../gravitymeter/gravity-stations/Longyearbyen-1978.jpg
../gravitymeter/gravity-stations/Longyearbyen-1978-b.jpg		 15:30
 Local time (UTC+2h)		 Kullkaien  6404.30 
6404.32
6404.34		  Distance from quay to sea: 3.0 m
 14. sep. 2004  10:07
Local time (UTC+2h)		 Dampskipskaia (=Hurtigrutekaia)
3rd mooring point from north.
Land gravitymeter put on top of mooring point, which is 41 cm above quay.
 Made in the mistaken belief that this location was a gravity station.
 5999.16
5999.19
5999.20		 Distance from quay to sea: 3.0 m
Pictures from quay		 10:27
Local time (UTC+2h)		 Dampskipskaia, alongside ship.
Land gravitymeter on quay. 		 5999.30
5999.31
5999.29		 Distance from quay to sea: 3.0 m
Pictures from quay

Ultrasys: Spring tension OFF

  • ST from program =14200.8
  • Digital gravity from program = 14200.9
  • ST on gravitymeter = 14201.4

 


3. Airgun array configuration


Click to download pdf file.

 

5. Marine seismic streamer configuration

Click to view streamer configuration as of 26. sep. 2004:

PDF-version